CodeDom这个东西个人觉得知识点不多,前几个续节写的已差不多了。在这节将演示一个CodeDom示例:
数据库实体类的生成。这里先声明在如今的CodeSmith或者是T4模板中实现这些都很简单,并且更实用,在这
里只是一个CodeDom示例,为了演示CodeDom。
在代码中位了简单、简化数据库数据信息的提取,引用了CodeSimth的SchemaExplorer.dll和SchemaExplorer.
SqlSchemaProvider.dll。可以在Demo中的CodeSimth目录下找到。
先贴上代码,需要讲解的东西没有什么:
using System; using System.Text; using System.Windows.Forms; using SchemaExplorer; using System.CodeDom; using System.CodeDom.Compiler; namespace CodeDomDemo { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { IDbSchemaProvider provider = new SqlSchemaProvider(); string connectionString = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"].ToString(); if (string.IsNullOrEmpty(connectionString)) { MessageBox.Show(this, "Connection String is requested,in app configuration.","Error", MessageBoxButtons.OK, MessageBoxIcon.Error); Application.Exit(); } DatabaseSchema db = new DatabaseSchema(provider, connectionString); lboxTables.Items.AddRange(db.Tables.ToArray()); }public CodeCompileUnit GenTableCompilerUnit(TableSchema item) { if (item == null) throw new ArgumentNullException("item"); CodeTypeDeclaration tableClass = new CodeTypeDeclaration(); tableClass.Attributes = MemberAttributes.Public | MemberAttributes.Final; tableClass.Name = item.Name;foreach (var col in item.Columns) { CodeMemberField field = new CodeMemberField(new CodeTypeReference(col.SystemType), "_" + col.Name); CodeMemberProperty property = new CodeMemberProperty(); property.Name = col.Name; property.Attributes = MemberAttributes.Public | MemberAttributes.Final; property.Type = new CodeTypeReference(col.SystemType); property.SetStatements.Add(new CodeAssignStatement(new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), field.Name), new CodePropertySetValueReferenceExpression())); property.GetStatements.Add(new CodeMethodReturnStatement(new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), field.Name))); tableClass.Members.Add(field); tableClass.Members.Add(property); } CodeNamespace nspace = new CodeNamespace(item.Database.Name); nspace.Imports.Add(new CodeNamespaceImport("System")); nspace.Types.Add(tableClass); CodeCompileUnit unit=new CodeCompileUnit(); unit.Namespaces.Add(nspace); return unit; } public string GenTanleCodeFromCompilerUnit(CodeCompileUnit unit, string language) { CodeGeneratorOptions option=new CodeGeneratorOptions(); option.BlankLinesBetweenMembers =true; option.BracingStyle ="c"; option.ElseOnClosing=true; option.IndentString=" "; StringBuilder sb=new StringBuilder(); System.IO.StringWriter sw=new System.IO.StringWriter(sb); CodeDomProvider.CreateProvider(language).GenerateCodeFromCompileUnit(unit, sw, option); sw.Close(); return sb.ToString(); }private void lboxTables_SelectedIndexChanged(object sender, EventArgs e) { int index = lboxTables.SelectedIndex; if (index > -1 && index < lboxTables.Items.Count) { object obj = lboxTables.Items[index]; if (obj is TableSchema) { CodeCompileUnit unit= GenTableCompilerUnit(obj as TableSchema); string language="c#"; if(!string.IsNullOrEmpty(this.toolStripComboBox1.Text)) language=this.toolStripComboBox1.Text; string code = GenTanleCodeFromCompilerUnit(unit,language); this.rtbCode.Text = code; } } } } }运行示图:c#图vb图:
代码比较简单界面也做得太简洁了,呵呵导出文件都没有,我觉得没有什么必要讲解的,如果有什么不懂的或者是写的不对
不好的,请留言,我会尽快回复。
本文转自破狼博客园博客,原文链接:http://www.cnblogs.com/whitewolf/archive/2010/07/08/1773361.html,如需转载请自行联系原作者