CodeSmith笔记

CodeSmith 部分学习
1. 注册子模板child.cst到主模板
 <%@ Register Name="ChildTemplate" Template="child.cst" MergeProperties="False" ExcludeProperties="" %>
 
2. 调用子模板并输出
    <% for(int i = 0; i < ThisTableList.Count; i++)
    {
        CodeTemplate b = new ChildTemplate();
        b.ThisTable = ThisTableList[i];
        b.Render(this.Response);
    } %>
    
3. 遍历TableCollection表，并输出表名
    <% for (int t = 0; t < ThisDatabase.Tables.Count; t++) { %>
        <%= ThisDatabase.Tables[t].Name %>
    <% } %>
    
4. 遍历Table列，其中DataType2CSharpType为一个自定义方法
<% for (int c = 0; c < ThisTable.Columns.Count; c++) { %>
    //数据库类型：DbType.<%= DataType2CSharpType(ThisIsTable.Columns[c].DataType) %>
    private <%= DataType2CSharpType(ThisIsTable.Columns[c].DataType) %> _<%= ThisIsTable.Columns[c].Name %>;
<% } %>

5. 遍历Table的PK
    <% for(int i=0;i<ThisTable.PrimaryKey.MemberColumns.Count;i++) {%>
      //主键名<%= i%>:<%= ThisTable.PrimaryKey.Name%>
      <%= ThisTable.PrimaryKey.Table.Name %>.<%= ThisTable.PrimaryKey.MemberColumns[i].Name %>
    <%}%>
    
6. 遍历Table的FK（从表明细）（以1：1为例）
    <% for(int i=0;i<ThisTable.ForeignKeys.Count;i++){%>
        //外键<%= i %>:<%= ThisTable.ForeignKeys[i].Name %>
        //外键<%= i %>对应的列
        <% for(int j=0;j<ThisTable.ForeignKeys[i].PrimaryKeyMemberColumns.Count;j++){%>
            <%= ThisTable.ForeignKeys[i].ForeignKeyTable.Name %>.<%= ThisTable.ForeignKeys[i].ForeignKeyMemberColumns[0].Name %>
        <%}%>
    <%}%>
    
7. 遍历Table的FK（主键表）（以1：1为例）
    <% for(int i=0;i<ThisTable.PrimaryKeys.Count;i++){%>
        //其他表从键<%= i %>:<%= ThisTable.PrimaryKeys[i].Name %>
        //外键<%= i %>对应的列
        <% for(int j=0;j<ThisTable.PrimaryKeys[i].PrimaryKeyMemberColumns.Count;j++){%>
            <%= ThisTable.PrimaryKeys[i].ForeignKeyTable.Name %>.<%= ThisTable.PrimaryKeys[i].ForeignKeyMemberColumns[0].Name %>
        <%}%>
    <%}%>
    
8. 添加选择目录输入参数
    private string templateOutputDirectory="";
    [Editor(typeof(System.Windows.Forms.Design.FolderNameEditor),typeof(System.Drawing.Design.UITypeEditor))]
    [Optional,NotChecked]
    [Category("OutputInfo")]
    [Description("输出结果目录")]
    [DefaultValue("")]
    public string OutputDirectory
    {
        get{
            if(string.IsNullOrEmpty(templateOutputDirectory))
            {
                return "C:\\"+(ThisDatabase!=null?ThisDatabase.Name:"Output");
            }
            else
            {
                return templateOutputDirectory;
            }
        }
        set{
            if(value.EndsWith("\\")  value=value.Substring(0，value.Length-1);
            templateOutputDirectory=value;
        }
    }
    
9. 添加选择文件的输入参数
    private string templateOutputFile;
    [Editor(typeof(System.Windows.Forms.Design.FileNameEditor),typeof(System.Drawing.Design.UITypeEditor))]
    [Optional,NotChecked]
    [Category("OutputInfo")]
    [Description("输出文件")]
    [DefaultValue("")]
    public string OutputFile
    {
        get{
            if(string.IsNullOrEmpty(templateOutputFile))
            {
                return "c:\\"+(ThisDatabase!=null?ThisDatabase.Name+".cs":"Output.cs");
            }
            else{
                return templateOutputFile;
            }
        }
        set{
            templateOutputFile=value;
        }
    }

或者
    <script runat="template">
    //生成实体Entity类
    privatevoid GenerateEntityClasses()
    {
        CodeTemplate Template =new EntityTemplate();
        foreach(TableSchema table inthis.SourceDatabase.Tables)
        {
            string FileDirectory = OutputDirectory +"\\"+ table.Name +".cs";
            //生成模板
            Template.SetProperty("Table",table);
            //文件输出
            Template.RenderToFile(FileDirectory,true);
            Debug.WriteLine(FileDirectory +" 创建成功.");
        }
    }
    </script>

10. 数据库类型转换成C#类型的函数
public string DataType2CSharpType(System.Data.DbType dbType)
{
    switch (dbType)
    {
        case DbType.AnsiString:
            return "string";
        case DbType.AnsiStringFixedLength:
            return "string";
        case DbType.Binary:
            return "byte[]";
        case DbType.Boolean:
            return "bool";
        case DbType.Byte:
            return "byte";
        case DbType.Currency:
            return "decimal";
        case DbType.Date:
            return "DateTime";
        case DbType.DateTime:
            return "DateTime";
        case DbType.DateTime2:
            return "DateTime";
        case DbType.DateTimeOffset:
            return "DateTime";
        case DbType.Decimal:
            return "decimal";
        case DbType.Double:
            return "double";
        case DbType.Guid:
            return "Guid";
        case DbType.Int16:
            return "short";
        case DbType.Int32:
            return "int";
        case DbType.Int64:
            return "long";
        case DbType.Object:
            return "object";
        case DbType.SByte:
            return "sbyte";
        case DbType.Single:
            return "float";
        case DbType.String:
            return "string";
        case DbType.StringFixedLength:
            return "string";
        case DbType.Time:
            return "DateTime";
        case DbType.UInt16:
            return "ushort";
        case DbType.UInt32:
            return "uint";
        case DbType.UInt64:
            return "ulong";
        case DbType.VarNumeric:
            return "decimal";
        case DbType.Xml:
            return "string";
        default:
            return "object";
    }
}
11. 获取数据库类型的字段在C#中的默认值
public string DataTypeDefaultValue(System.Data.DbType dbType)
{
    switch (dbType)
    {
        case DbType.AnsiString:
            return "String.Empty";
        case DbType.AnsiStringFixedLength:
            return "String.Empty";
        case DbType.Binary: //Answer modified was just 0
            return "new byte[] {}";
        case DbType.Boolean:
            return "false";
        case DbType.Byte: //Answer modified was just 0
            return "(byte)0";
        case DbType.Currency:
            return "0";
        case DbType.Date:
            return "DateTime.MinValue";
        case DbType.DateTime:
            return "DateTime.MinValue";
        case DbType.DateTime2:
            return "DateTime.MinValue";
        case DbType.DateTimeOffset:
            return "DateTime.MinValue";
        case DbType.Decimal:
                return "0.0m";
        case DbType.Double:
            return "0.0f";
        case DbType.Guid:
            return "Guid.Empty";
        case DbType.Int16:
            return "(short)0";
        case DbType.Int32:
            return "(int)0";
        case DbType.Int64:
            return "(long)0";
        case DbType.Object:
            return "new object()";
        case DbType.SByte:
            return "(sbyte)0";
        case DbType.Single:
            return "0F";
        case DbType.String:
            return "String.Empty";
        case DbType.StringFixedLength:
            return "String.Empty";
        case DbType.Time:
            return "new DateTime(1900,1,1,0,0,0,0)"; //return "DateTime.MaxValue";
        case DbType.UInt16:
            return "(ushort)0";
        case DbType.UInt32:
            return "(uint)0";
        case DbType.UInt64:
            return "(ulong)0";
        case DbType.VarNumeric:
            return "(decimal)0";
        case DbType.Xml:
            return "String.Empty";
        default:
            return "null";
    }
} 
12. 文件输出函数
    public override void Render(TextWriter writer)
    {
        if (!Directory.Exists(OutputDirectory))
            Directory.CreateDirectory(OutputDirectory);
        StreamWriter BaseFile = new StreamWriter(OutputFile, false);
        base.Render(writer);
        BaseFile.Close();
    }