C#应用DesignSurface完成简朴的窗体设想器的要领引见（图文）【C#.Net教程】,C#，DesignSurface，窗体设计器

这篇文章重要引见了C#应用DesignSurface怎样完成简朴窗体设想器的相干材料，文中经由过程图文及示例代码引见的很细致，对人人具有肯定的参考价值，须要的朋友们下面来一同进修进修吧。

System.ComponentModel.Design.DesignSurface是为设想组件供应一个用户界面，经由过程它能够完成一个简朴的窗体设想器。

在构建之前，我们须要引入System.Design.dll，不然会涌现找不到DesignSurface的毛病。

private void Form1_Load(object sender, EventArgs e)
 {
  //援用System.Deisgn.dll
  DesignSurface ds = new DesignSurface();
  //最先加载窗体
  ds.BeginLoad(typeof(Form));
  Control designerContorl = (Control)ds.View;
  designerContorl.Dock = DockStyle.Fill;
  this.Controls.Add(designerContorl);
 }

运转后涌现简朴的一个UI设想器

然则该设想器并不能完成控件拖放和UI设想器，以及控件的属性设置。

为了支撑从源代码加载初始化窗体，须要对源码中的相干要领举行剖析，这里我们 CodeDomDesignerLoader来完成定制化营业，CodeDomDesignerLoader是供应用于完成基于 CodeDOM 的设想器加载顺序的基类。

继续它的类须要重写CodeCompileUnit Parse()要领，来完成加载窗体：

protected override CodeCompileUnit Parse()
 {
  
  #region 源文件读取
  var sw = new StreamReader(@"E:\FrmUser.cs");
  var sw_designer = new StreamReader(@"E:\FrmUser.Designer.cs");

  string formCodeCS = sw.ReadToEnd();
  string formCodeDesigner = sw_designer.ReadToEnd();

  List<string> source = new List<string>();
  source.Add(formCodeCS);
  source.Add(formCodeDesigner);

  #endregion
  //Rolsyn剖析C#
  var rootDesigner = Source2CodeDom.Parse(formCodeDesigner);
  codeDesingerCompileUnit = Source2CodeDom.GetDesignerCodeComplieUnit(rootDesigner);
  var rootCS = Source2CodeDom.Parse(formCodeCS);
  codeCSCompileUnit = Source2CodeDom.GetCodeComplieUnit(rootCS);
  //MergeFormSource
  string mergeS = Source2CodeDom.MergeFormSource(formCodeDesigner, formCodeCS);
  codeMergeCompileUnit = Source2CodeDom.GetMergeDesignerCodeComplieUnit(mergeS);
  return codeMergeCompileUnit;

剖析的要领以下，然则此剖析只是用于代码的生成，并不能用户UI界面的显现：

public static CodeCompileUnit GetDesignerCodeComplieUnit2(CompilationUnitSyntax root)
 {
  CodeCompileUnit ccu = new CodeCompileUnit();
  var firstMember = root.Members[0];
  var namespaceDeclration = (NamespaceDeclarationSyntax)firstMember;
  var designClassDeclaration = (ClassDeclarationSyntax)namespaceDeclration.Members[0];
  var myDesignerClass = new CodeTypeDeclaration(designClassDeclaration.Identifier.ToString());
  var initializeComponent = new CodeMemberMethod();
  var ns = new CodeNamespace(namespaceDeclration.Name.ToString());

  foreach (var m in designClassDeclaration.Members)
  {

  if (m is ConstructorDeclarationSyntax)
  {
   var ctor = ((ConstructorDeclarationSyntax)m);
   var codeBody = ctor.Body.ToString();
   codeBody = codeBody.Trim().TrimStart('{').TrimEnd('}').Trim().TrimEnd(';');
   CodeSnippetExpression csbody = new CodeSnippetExpression(codeBody);
   CodeExpressionStatement stmt = new CodeExpressionStatement(csbody);
   //Add the expression statements to the method.
   // InitializeComponent
   var cctor = new CodeConstructor();
   cctor.Name = ctor.Identifier.ToString();
   //var cmm = new CodeMemberMethod();
   //cmm.Name = ctor.Identifier.ToString();
   //cmm.Attributes = GetCtoRAttrMapping(ctor);
   //cmm.ReturnType = new CodeTypeReference(typeof(void));
   cctor.Statements.Add(stmt);

   myDesignerClass.Members.Add(cctor);
  }
  if (m is FieldDeclarationSyntax)
  {
   var F = ((FieldDeclarationSyntax)m);
   var type = F.Declaration.Type;
   foreach (var variable in F.Declaration.Variables)
   {
   var field = new CodeMemberField();
   field.Name = variable.Identifier.ToString();
   field.Type = new CodeTypeReference(type.ToString());
   field.Attributes = GetFieldAttrMapping(F);
   //field.InitExpression = new CodePrimitiveExpression(null);
   myDesignerClass.Members.Add(field);
   }
  }
  if (m is MethodDeclarationSyntax)
  {
   var node = m as MethodDeclarationSyntax;
   #region xml comments
   var xmlTrivia = node.GetLeadingTrivia()
   .Select(i => i.GetStructure())
   .OfType<DocumentationCommentTriviaSyntax>()
   .FirstOrDefault();

 

   #endregion



   var method = (MethodDeclarationSyntax)m;

   var cmm = new CodeMemberMethod();
   cmm.Name = method.Identifier.ToString();



   ///XML解释
   string[] comments = xmlTrivia.ToString().Split("\r\n".ToCharArray());
   foreach (string text in comments)
   {
   if (text.Trim() != "")
   {
    cmm.Comments.Add(new CodeCommentStatement(text.Trim().TrimStart("///".ToCharArray()).Trim(), true));
   }
   }



   if (cmm.Name == "InitializeComponent")
   {
   //region 
   CodeRegionDirective codeRegion = new CodeRegionDirective(CodeRegionMode.Start, "Windows 窗体设想器生成的代码");
   CodeRegionDirective codeEndRegion = new CodeRegionDirective(CodeRegionMode.End, "");

   cmm.StartDirectives.Add(codeRegion);
   cmm.EndDirectives.Add(codeEndRegion);
   }

   //MemberAttributes.Family is protected
   //cmm.Attributes = MemberAttributes.Override | MemberAttributes.Family;
   cmm.Attributes = GetMethodAttrMapping(method);
   cmm.ReturnType = new CodeTypeReference(method.ReturnType.ToString());

   foreach (var p in method.ParameterList.Parameters)
   {
   CodeParameterDeclarationExpression cpd = new CodeParameterDeclarationExpression();
   cpd.Name = p.Identifier.ToString();

   cpd.Type = new CodeTypeReference(p.Type.ToString());

   cmm.Parameters.Add(cpd);
   }
   //包括要领{};，会反复生成{};
   string codeBody = method.Body.ToString();
   codeBody = codeBody.Trim().TrimStart('{').TrimEnd('}').Trim().TrimEnd(';');
   if (codeBody != "")
   {
   CodeSnippetExpression csbody = new CodeSnippetExpression(codeBody);
   CodeExpressionStatement stmt = new CodeExpressionStatement(csbody);
   //Add the expression statements to the method.
   cmm.Statements.Add(stmt);
   }
   myDesignerClass.Members.Add(cmm);

  }
  if (m is MemberDeclarationSyntax)
  {

  }
  }

  ccu.Namespaces.Add(ns);

  //Partial Class
  myDesignerClass.IsPartial = true;
 

  ns.Types.Add(myDesignerClass);

  

  return ccu;
 }

窗体的显现，须要逐句举行C#剖析，特别是InitializeComponent()要领。

.CS Code实在最简朴的就是读取源代码，然后返回就能够了。当设想器增加控件或许绑定事宜时，能够经由过程文本操纵举行代码完美。

 //直接返回代码，最简朴
 public string GetTextCSCode()
 {
 Flush();
 return CSTextCode;
 }

CodeDomHostLoader类中有OnComponentRename，在设想重视定名组件时刻相应，这里能够修复背景.cs中的控件援用

但此设想器另有许多不完美的处所，后期有时间再完美吧。

总结

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