Delphi tobject to string. Some kind of universal container.

Delphi tobject to string function TMainForm. TObject encapsulates fundamental behavior common to objects by introducing methods that: Create, Create a public function in your class, or override ToString if you are using Delphi 2009 or later: Public function ToString: string; override; Then, inside the function body, put Wenn du die Objekte in der Liste nich automatisch freigeben läßt, sondern dieses selber machst, dann sollte String(meineListe. Sort with necessary sorted functions as I have a string var 'HTMLCode' that contains HTML code. The general idea is that the string will be compatible enough to save anywhere, move it around, and load it I have Delphi 2006 client application. For this purpose, TPersistent introduces methods that can be overridden to: Jul 30, 2010 · 在经过前段日子的评估与调查后，从今天开始进行重构。 也想趁这个机会，将界面的开发由Delphi 6转向Delphi 2009。从而逐步放弃Delphi 6这个用了近7年的开发工具。也知道在转移的_delphi implicit string cast with potential data loss from 'string' to 'short Nov 29, 2023 · These methods of TObject are available for objects of every class, since TObject is the common ancestor class of every class. But I am at I would like to get text width of a string before an application starts. Objects[index]) als Grundsätzlich ist es aber heute mit Generics in 99,9% der Fälle nicht sinnvoll, den Weg mit TStringList zu gehen, wenn man Objekte und Strings einander zuordnen möchte. Perhaps I need to split the string under '=' and ',' ? Any other ideas are welcome thanks. I don't know how to save data into json – Romowski. They must be explicitly destroyed With a dynamic array, and a suitably modern version of Delphi you can use an array constructor. SysUtils. From Excel VBA it´s working: I have the following string A type string. Briefly, a TStringList is like an array of strings that you can reference by index. JSON. g. This method takes a string representation of a JSON object or array and converts it to a Delphi object or array. Button1Click(Sender: TObject); begin SaveStringGrid(StringGrid1, 'c:\temp. Directives should appear in the class declaration only, not in the defining declaration, and should always be listed in the following order: reintroduce; overload; binding; calling convention; abstract; warning where binding is virtual, dynamic, or You can use the Delimiter and DelimitedText of a TStringList to do this in a few lines of code - see below. ReadAl 1 Use a string variable in your form textvar 2 Use a single variable bitword 3 Use the procedure str Textvar <--- bitword 4 Assign Textvar to Editbutton. Text:= Ticks. For reference this what I am getting at, I studied Barry Kelly's blog post referenced in the prior SO post mentioned above and came up with this solution:. } TNewObject = class private FName: String; public constructor Create (const AName: String); Ever wanted to take an Object into a format that is easily persisted and back? Well now you can. If we are an object (e. AddObject(string, Pointer(int_val)). Basically, I want to store different objects in that list, but all objects will descend from TSerializable, By default, the ToString returns a string containing the class name of the instance that is being called. Ticks: integer; LabelTicks: TLabel; () LabelTicks. 5. You can use the 'virtualness' of the tree. var OutputPath: string; OutputBuffer: TBytes; begin // use SetLength to set the length of your OutputBuffer // byte array, fill it somehow and then call WriteAllBytes TFile. And it works. Some kind of universal container. The meaning of the Assigned function. Follow answered May 16, 2016 at 16:56. Sorted property), a string/object map (via the . JSON Options. procedure TdlgPreferences. I can get some object to give back what I think is Since they are reserved as string delimiters they need to be escaped. Delphi: determine actual type of a generic I just did my first steps with a 30day test version of Delphi XE8 and figured out that one has to write e. You will have to use one of the standard lifetime management mechanisms: You take care of it with try/finally blocks, and explicit calls to Free. Button2Click(Sender: TObject); begin LoadStringGrid(StringGrid1, 'c:\temp. LabelTicks. Most likely because I'm pretty new to Delphi (and coming from C#). For example, calling ToString on The ToString method concerts the current Single value into a string representation. You can't do it with a record without allocating memory when you add a new record to the TStringList. rgMyGroupClick(Sender:TObject) begin if sender is TRadioButton then //do action else if sender is TForm then . For example, calling ToString on a TButton instance returns a string containing "TButton". You don't need to load all the data into the tree. Canvas. David Description: The Object keyword has one principle use - to qualify a function or procedure data type, allowing it to refer to an equivalent object method. TObject is the ultimate ancestor of all objects and components. type TDay = (dMonday, dTuesday, dWednesday, dThursday, dFriday, dSaturday, dSunday); Then we can create a constant array indexed by TDay that contains the day names:. 3] of Pointer; PVtable = ^TVtable; PPVtable = ^PVtable; begin TMethod(Result). I have a form (not the main one)for getting many different data from the user and I want to pass it to a manager class for creating an object with these. Here's the magic you're looking for - delete your OnDrawCell handler, and create an OnCreate handler for the form. If so then this char literal could instead be expressed as "'", though whether you find this less or more confusing In Delphi 2009 and later, String is an alias for UnicodeString. The FormatProvider parameter determines the parsing rules and is beyond the scope of this article. I have a lot of information to display into a TStringList. GetName<T{: enum}>(AValue: T): string; class It has several specialized methods for string-list handling that make it extremely versatile: it can essentially be used as a list of strings, a set of strings (via the . Objects added to the TStrings object still exist even if the TStrings instance is destroyed. Assign(self. Here's how I would do it. I need to store multiple objects (most of them are TObject/non persistent) to a TMemoryStream, save the stream to disk and load it back. Length) that can be called on the types. JSON unit. This is Embarcadero's code: procedure THTMLEdit. txt': procedure TForm1. EDIT: Delphi specific serialization. Unlike on Delphi, where the String types are basically pointers, the above types are implemented as records, meaning they provide APIs (such as . TJSONObject. Font. The Delphi Case Statement only supports ordinal types. So you need to call Add on List. Add(Client); // <--- mistake here finally Clients. Jump to: navigation, search. I am using Delphi XE7 and I am having trouble converting objects into JSON. xfm or . LoadFromFile() what the encoding of the file is. Every class has a unique VMT and all objects of that class share the class's VMT. Somehow this crucial information is missing as an answer: In recent Delphi versions there is no need to write any generic helper to convert enums to string and back, because it is already there in System. It must be possible, the Object Inspector and Code Complete seem to do that. The objects need to be streamed one after each other. Hot I haven't got the time to review all the code, but I do see that you're using a static IV set to all zero's. Code. Lines. Unfortunately, StrToDate() requires the input string to have a separator between the date components (ie 2017/09/01), but your input string does not (20170901). Jun 5, 2014 · Using TJSON you can convert an object to a JSON string and back with a little help from generics along the way. Objects, and you'd have to free it afterwards. TPersistent is the ancestor for all objects that have assignment and streaming capabilities. The table below describes all the available If the type of Data is TObject then you cannot avoid memory management issues. I'd like a function that takes an enum and returns a stringlist (or name:value pairs). Free; end; end; Calculating text width The TObject methods fall into two categories - class and non-class. Names[c]]); an implicit local variable of type string is created to hold whatever sl. So you would need to write it like this: So I think I need to duplicate those existing default string helper functions in my new string helper, and call into the original. Create, maintain, and destroy instances of the object by allocating, initializing, and freeing required memory. ObjectToJsonString accepts an optional set of options, AJsonOptions, that determines how ObjectToJsonString interprets the data of AObject and renders that data in the resulting JSON string. The Converts the current salient Object contents into a formatted string. Create(btn1, btn2, btn3); And then to iterate over the array of buttons: It's soooooooo much easier, Delphi does everything for you. For this purpose, TPersistent introduces methods that can be overridden to: I have a TObjectList, which I am trying to write to disk. I want to assign a record to TStringGrid. You can get it to parse an input string into the array by setting the value of the delimiter, in your case '|' and then assigning the input string to its DelimitedText property. But instead, we can use an enumerated type:. Why a function was ever needed, I do not know. This allows you access to TJSON a class with some very helpful class methods. I think it goes without saying that strings are easy to store on disk. The following code uses a class called TFoo that has a Foo and a Fee property (string and Integer) Mar 12, 2020 · 我们都知道，在 DELPHI 中 TObject 是所有 class 系列对象的基本类。也就是说，在 DELPHI 中，TObject 是万物之源。不管你自定义的类是否指明了所继承的父类，一定都是 TObject 的子孙，一样具有 TObject 定义的所有特性。 那么，一个对象到底是什么？ Jul 20, 2012 · 但借助于string类型，两者可以互相转换，但并不推荐这样做。因为这样会降低程序的运行效率。variant转tobjecttobject(string(v));tobject转stringstring(tobject);其实借助于integer 也可以在两者之间进行转换。但没有string做为媒介转换的信息多。因为str_delphi Jul 29, 2015 · Strings是一个可读写的属性。这也就是说，大家并不仅可以获取第N行的内容，也可以改变第N行的内容。因此我们需要知道TStringList里String的总数。TStringList的属性Count则可以满足我们的需求。 May 23, 2003 · 以下内容是CSDN社区关于如何把word类型转换成string类型？ 相关内容，如果想了解更多关于Delphi社区其他内容，请访问CSDN社区。 社区 Delphi 帖子详情 如何把word类型转换成string类型？ luo521 2003-05-23 11:01:14 Feb 13, 2023 · function TObject. const DayNames: array[TDay] of string = ('Monday', 'Tuesday', 'Wednesday', It may seem a little newbie, but I really have got problem with it. myArray := TArray<string>. IntToStr( Ticks); But: The variable 'Ticks' seems to be an object! I did not expect that, but you can also write. I can´t read OleVariant type data from delphi. Consider this program: var p: Pointer; procedure TForm1. The formatting value has the following syntax : Feb 3, 2023 · By default, the ToString returns a string containing the class name of the instance that is being called. So, you don't know how to save data into JSON string or how to save delphi string to file ? – Arioch 'The. List := Clients. The way you're doing it now is fine. Everything works fine until Application. It is preferable to set OwnsObjects as part of the object's construction. LockList; try To convert JSON to a class in Delphi, you can use the TJSON. TStringHelper. Why would you then expect that local variable's content to magically be stored in the cells? All you've done is drawn it. procedure FuncStringList (StringList : TStringList); and let the calling code create and free the string list. ReadAl (Especially with older Delphi versions. TObject vs String casting there and back. Use ClassName to obtain the class name from an object instance or class reference. However, WideCharToString() long predates UnicodeString, dating back all the way to at least Delphi 5 (maybe even earlier) when String was an alias for AnsiString instead. Set the RootNodeCount of the tree to the number of records in CustomerObjectList: This is a very broad question with many different angles. This is useful for differentiating object instances that are assigned to a variable that has the type of an ancestor class. By default, the ToString returns a string containing the class name of the instance that is being called. The TObject methods fall into two categories - class and non-class. You've drawn (using DRAWText) some text you assigned to a local variable. It provides a ready method for classes to convert At StackOverflow, you are not allowed to change your question to a new one. Description: The ToString method concerts the current Char value, or the specified UnicodeChar into a string representation. Rtti, and in fact it is implemented very similar to the existing answers here. Using TJSON you can convert an object to a JSON string and back with a Continue reading How to convert an object to JSON and back with a single line Delphi knows class helpers you can use to add functionality to existing class. Memo1. Such a static method cannot access any class fields because a class has no data itself - only instantiated classes - objects - have data. I didn't want to confuse the issue; but if you look at IEnumerable, you'll see what is actually going on. – Wim ten all of the fields start out empty, that is, pointers are initialized to nil, strings and dynamic arrays are empty, numbers have the value zero, Boolean fields are False, and I've searched a lot, but cannot find a working solution. In Delphi, a set cannot have string as its base type. The Formatting string (or array of strings) provides the desired formatting of the Double value. Names[c]] evaluates to. Tests for a nil (unassigned) pointer or procedural variable. Object (TObject) class. It should only count the word "in" and not words that contain "in". How to encrypt/decrypt it and have a normal view: letters only from A to Z and numbers from 0 to 9. Hence the use of the backslash character as the escape character. As Jim mentioned already, in this specific cast you added an event handler to the OnClick event of Button1. The pseudocode seems simple enoug As already stated, the easiest way is to use a Stream and its WriteComponent and ReadComponent methods. 1. ClassName); Nov 27, 2024 · Returns a string containing the class name. ToString: string; begi n. The formatting value has the following syntax : I'm wondering how I can perform serialization of a generic TObjectList<T> container. ToString. I believe the first thing you need it to iterate over its pairs (use GetEnumerator if you don't know the key names, otherwise just use the overloaded Get - passing a string instead of a number). If your data is an object, it will have the type TJSONObject, so check its API to see how to proceed. Imagine the following code: procedure TForm1. Values[sl. Create('this', 'that', 'and uh'); If you want to create an array of buttons then it is written so: buttons := TArray<TButton>. The older, obsolete use (not given in the syntax above), was used to create an object (now we use a class constructor). TCustomer, TPatron, TSalesOrder, TShape), then we can return the object just fine. Note: ToString is intended to be overridden in user-derived classes, to provide consumer objects TObject is the ultimate ancestor of all objects and components. Helper. – Remy Lebeau procedure ListView1Edited(Sender: TObject; Item: TListItem; var S: string); Note that the item is passed as type TListItem . This client recieves an Olevariant type data from COM server. (Sender: TObject); var Returns a string containing the class name. TClassRegister = class class procedure RegisterClass(AClass: TClass); This statement in the documentation for TStrings. TextWidth('My String')); finally c. ShowSender(Sender: TObject); begin. System. Create; try c. Commented May 28, 2013 at 10:48. Returns a JSON string that represents the specified TObject descendant. There's nothing to keep the string alive. Note: ToString is intended to be overridden in user-derived classes, to provide consumer objects with a string representation. The ToString method concerts the current Single value into a string representation. This example demonstrates the usage of the generic TObjectList class. The compiler is not going to manage the lifetime of a TObject instance for you. Font); Caption := IntToStr(c. Proc2NotifyEvent(const aProc: TNotifyReference): TNotifyEvent; type TVtable = array[0. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company While digging in the depths of a legacy application I was shocked to see that a binary data received through the network is stored and handled as a String. The is keyword tests to see if an object is of a certain type. You can try for example: TObjectHelper = class helper for TObject private function GetMyProp: string; procedure SetMyProp(const Value: string); public property myprop:string read GetMyProp write SetMyProp; end; How can in delphi convert : '1' to '1,00' or '1,5' to '1,50' e. thank you I want create a Playlist control. Parse method provided by the REST. LockList; try Clients. Use TBytes instead. And ansistring is much faster, gets automatically created and destroyed, can have any length (up to 2GB), uses less memory --because identical strings only get stored once (which means stringa:= stringb where a string is 20 chars is at least 5x faster using ansistrings than array's But you could actually pass any object to a Sender parameter as long as it inherits from TObject in this specific case. Button1Click(Sender: TObject); Var tb: TBytes; s: String; begin tb := TFile. That will confuse people and make it difficult to find the question you are looking for. g All variables are in string. TObject); var c: TBitmap; begin c := TBitmap. All content below this line refers to System. txt'); end; // Load StringGrid1 from 'c:\temp. The function is: procedure OnLimitsChanged(var SymbolsChanged: {??PSafeArray}OleVariant); This function returns an array of string. Here is an example of how to use TJSON. Button1Click(Sender: TObject); var buf: TBytes; I: Integer; begin //ANSI编码 buf 终身会员 周边 新闻 博问 闪存 赞助商 Chat2DB 所有博客 当前博客 我的博客 我的园子 Oct 16, 2011 · Description. Items, where having Items the default allows you to use List[x] instead of List. TPersistent encapsulates the behavior common to all objects that can be assigned to other objects, and that can read and write their properties to and from a form file (. 2c67. This is a very important method - allowing all classes to show themselves as it were. Commented May 28, 2013 at 10:51. pas(36): E2018 Record, object or class type required Assuming you are running this code on Windows, then the problem is two-fold: you are not telling TStringList. Objects property) and a string/string map String APIs. This hidden field points to the class's virtual method table (VMT). Bonus Reading. Jun 10, 2009 · 文章浏览阅读570次。TObject = class//创建constructor Create;//释放procedure Free;//初始化实列class function InitInstance(Instance: Pointer): TO_delphi xml to tobject [摘要]Delphi 中的所有类都是从 TObject 继承而来的，都具有 TObject 的所有特性，TObject 是所有类的根类，本文详细介绍TObject。 Mar 19, 2023 · Delphi 版本： Delphi 中的所有类都是从 TObject 继承而来的，都具有 TObject 的所有特性，TObject 是所有类的根类。 我们可以在 System 单元中找到 TObject 的定义，但是这个定义并不完整，我们只能对 TObject 有一个大概的了解，因为 TObject 的 May 12, 2021 · While digging in the depths of a legacy application I was shocked to see that a binary data received through the network is stored and handled as a String. ToInteger(Self); end; [dccosx64 Error] My. That local variable goes out of scope, as far as the compiler is aware, nothing references it, and the string object is destroyed. It's easy because each part is always at the same position. Something like this : function TStringHelper. The documentation states this:. But exist another options like . AddObject, which is how the Strings are added to the destination, further muddies the waters for me: Note: The TStrings object does not own the objects you add this way. build a function which returns a Integer (hash) based on a string; using generics and anonymous methods ( A generic case for strings) using a function which receive an array of strings (Making a case for Strings, the sane way) In my application I have many sets defined: eBlockTypes = (btNone,btUndefined,btStone, btYellowFlower, btWoodBrown); sMinerals = set of eBlockTypes; var mineralsRare: sMinerals; minerals The OwnsObjects property of TStringList should be set to True in order for the list to free its objects when being destroyed. As far as I understand it, it can be used to store object instances that can be accessed via string keys (basically what was always possible with a sorted TStringList but typesafe). Code here is an old tipp from SwissDelphiCenter that could help you // Save StringGrid1 to 'c:\temp. dfm file). type { Declare a new object type. Variables of function and procedure types can be used as pointers, in effect, to functions and procedures Description. Improve this answer. text For the opposite use the val procedure after the OnExit event Example The text isn't there. Button1Click(Sender: TObject); var Returns a string containing the class name. When you write: s := PChar(sl. I want to convert it into TStringList in order to see if the flagC is set to 1 by inspecting B. html'); StringToFile(TempFile, HTMLCode); wbBrowser. If you have Delphi older than Delphi 2009 you might be missing the tkUString type. Or, relevant to the OP's actual case: a string may be freed behind your back. By default, with no parameters, it is equivalent to ToString('G') - 'General' formatting is carried. More fun with typecasting I would extract each part of the date (year, month, day, hours, minutes, milliseconds) from that string, and encode a datetime value. an Integer, String, or OleVariant), then it will return nil, and not crash horribly. I want to load this code into the browser. Parse to convert a JSON object to a Delphi class: What does VarType(v) return? Mask that with the varTypeMask constant using the AND operator to find out the data type of the individual elements of the array, ie: ElementType := VarType(v) and varTypeMask;, then use the VarArray() functions (VarArrayLowBound(), VarArrayHighBound(), VarArrayGet(), etc) to access the elements. StrToDate() does not allow DateSeparator to be set to #0 when parsing a string, even if the ShortDateFormat does not specify any separators are in the format. "} The JSON is invalid because: it isn't escaping CR into \r; it isn't escaping LF Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Generics Collections TObjectList (Delphi) From RAD Studio Code Examples. A = 'flagA=0,flagB=0,flagC=1' I also have. Some of the new classes of Delphi 2009 override the ToString virtual function, like TStringBuilder and TStringWriter. (NOTE: In Delphi 2010 I seem to recall that strings may now be delimited with either single or double quote chars, although I do not recall off-hand whether this extends to char literals (as distinct from single character strings. Although I end up with a file (54 bytes), when I change the FNAME property value to something really long, the size of the file never changes, and I get nil when I try to read it. Str. ; You derive your object from TComponent and let it be actually i was opened question previously, but can't get answer what i exactly want, so i would like to ask again thanks All for example, i have some text file name is 'test. Create is responsible for zeroing all data, not calling that one results in possible unknown data. New in XE6 is the REST. Objects[index]), oder auch PChar(meineListe. Converts the current salient Object contents into a formatted string. It should be pretty easy to use a random IV and prepend that to the cipher text before encoding it in base 64. TObject encapsulates fundamental behavior common to objects by introducing methods that: . A user must send Is there a Delphi function to split string by a multi-character delimiter rather than a single character ? For instance when I'd use that function this way: SplitString('Whale<->Mammal<->Ocean', '<->') I would get a result of these 3 strings: 'Whale', 'Mammal', 'Ocean' Is there such function in Delphi for this ? From Delphi 9 help: Method declarations can include special directives that are not used with other functions or procedures. If so, simply remove it from the following code: The string contents may be transferred by other means between each of these, such as copying the string from a text file and saving it to a database record. For each pair, the key will be a simple Yes, just create your own list of classes and add whatever classes you want to it. : Notes: ToString without parameters is a method inherited from the base System. your string might look like this: a5b3. EDIT: This is a very basic example, but I think you can understand the concept easily enough. Note that the test if AObject is TObject is always true because every object is derived from TObject. For the base Object type, there For example, calling ToString on a TButton instance returns a string containing "TButton". . The user needs to enter a sentence where the code should display the number of times the word "in" appears in the sentence. EditText(CONST HTMLCode: string); {VAR Doc: IHTMLDocument2; TempFile: string; } begin TempFile := GetTempFile('. ) Since TObject. Use Assigned to determine whether the pointer or the procedure The Delphi XE2 online help (as well as the Embarcadero DocWiki) is very thin on the documentation of TObjectDictionary (or I am too stupid to find it). B:TStringList. But If need sort by integer field and string - use TObjectList and after adding all records call TObjectList. For the base Object type, there are no real contents, so the class name itself is used as the string. ToInteger: integer; begin result := System. txt'); end; // I have a string - a serial number of a mother board (only numbers and letters). If your need sorted by string then use sorted TStringList and add record by TString. Among the existing classes, the method has been redefined in the Exception class, to return the messages in a list of exceptions (as covered in the section "The InnerEx-ception Feb 28, 2024 · Byte 与 字符串（AnsiString、WideString） 相互转换 代码 String转Byte procedure TForm1. But be aware that : - it works for descendants of TComponent, not plain TObject; - only for the published properties (those saved in a dfm), not the public ones nor (a fortiori) the privwte ones; - you have to pay a special attention for the Name property when If T is not an object (e. So you cannot use strings directly. From Delphi in a Nutshell: The TObject class declares several methods and one special, hidden field to store a reference to the object's class. At the For array properties, to indicate that the array is the default property of the class (such as Delphi's TList. Respond when object instances are created or destroyed. This can be achieved either by calling the constructor overload that receives the OwnsObjects parameter, or by explicitly setting the property after creation. class function TRttiEnumerationType. So, instead you should free the string list in the calling context after you're done working with it or pass the string list as a parameter to your function like this. So, unless the file begins with a UTF-8 BOM (which is unlikely with a JSON file), it will be decoded as ANSI, not as UTF-8, thus corrupting any NON-ASCII characters. ToString returns the (invalid) JSON: {"comment":"The quick bröwn fox↵ jumped \"over\" the \lazy/ dog↵ then 💩 on a log. ToString() The call: o. Es Are there methods in the TValue class or in Rtti to convert a string to the desired simple type (Like Integer, Float, DateTime)? TValue has a method that converts a simple Description: The ToString method concerts the current Single value into a string representation. ToString; Description. Navigate(TempFile); does therefore not copy the string list, but only copies the reference. txt' , and inside text. Description. Values['flagC']. Json unit. ToString inherits from System. Returns a string containing the class name. You're just as well off using a class as you are now; you have to free the objects before freeing the stringlist. Add ('Class Name: ' + Sender. Objects instead of an object because so many objects may take a while to create/destroy. Text:= System. For reals, pointers, and strings, there is an implicit default value of 0, nil, and '' (the empty string), respectively. Like strings in Delphi, they are not part of the TObject class hierarchy, and cannot be assigned to TObject-typed references. WriteAllBytes(OutputPath, OutputBuffer); end; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company How do I have Delphi XE6 return me the corresponding valid JSON string? Research Effort Attempt #1 - TJsonObject. Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument). Here is how we can use these methods to access class information: procedure TSenderForm. Then you could parse that string and assign the appropriate values to all the members. I have a unit with the following class declaration: TReplaceField = class public Key: string; Value: string; constructor Create; overload; constructor Create(strKey, strValue: string); overload; end; Take as an example of this issue the following: since you're encoding Unicode Delphi strings in UTF-16 format, the second byte of each character is usually zero (unless you're in the east or a country with a non-latin alphabet), and you will find the exact bytes of the key repeats in your encoded stored strings. When prefixed by the keyword Class , a method may be called in both an object of the class, and in the class itself. UnlockList; end; The idiom is that you lock the list with a call to LockList and that returns a mutable list. At the moment I put all properties/fields/variables of an object into a record and save the record to stream. The WriteAllBytes method takes TBytes which is defined as TArray<Byte> and so is an array of bytes, not just a single Byte. TObject. MainForm canvas present. i need to print a string directly into the printer i found this code by searching uses WinSpool, Printers type TDoc_Info_1 = record pDocName: pChar; pOutputFile: pChar; pDataType: p This site describes the type TJSONValue in more detail. Items[x] in your code. 1 At least as far back as Delphi 5, a PWideChar could be assigned directly to an AnsiString, Here is how to set the published string property values to an empty string and boolean values to False by using the old style RTTI. Share. Much of the code in your question betrays an incorrect understanding of the Assigned function. plol rehptn ordu xjw jggyz cbhaes sjgd ompj atarh xdbtdbko