Question

如何使用自定義控件渲染其他控件？顯然，在渲染階段，已經太晚了。測試工作，它不包含< ASP：sometag >，但test2的是什麼，我希望能夠寫出來和渲染正確

protected override void Render(HtmlTextWriter writer) 
     { 
      const string test = @"<a href='http://www.something.com'></a>"; 
      const string test2 = "<asp:HyperLink ID='HyperLink1' runat='server' NavigateUrl='www.something.com'>Some Text</asp:HyperLink>"; 

      writer.Write(test2); 
     } 

Answer 1

可以重寫CreateChildControls方法as shown in this example：

protected override void CreateChildControls() 
{ 
    // Add a LiteralControl to the current ControlCollection. 
    this.Controls.Add(new LiteralControl("<h3>Value: ")); 

    // Create a text box control, set the default Text property, 
    // and add it to the ControlCollection. 
    TextBox box = new TextBox(); 
    box.Text = "0"; 
    this.Controls.Add(box); 

    this.Controls.Add(new LiteralControl("</h3>")); 
} 

您可以實例化並添加HyperLink控件，而不是文字/文本框控件，例如：

var link = new HyperLink(); 
link.NavigateUrl = "..."; 
link.Text = "..."; 
this.Controls.Add(link);