show your Render code, either you need to add Button to your Controls before you call base.Render or render it specifically with Button.RenderControl(writer), show your codeby the way, it is a bad idea to add controls in Render
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{
private Label label1 = new Label();
private Label label2 = new Label();
private Button button1 = new Button(); public TestComponent()
{
//
// TODO: 在此处添加构造函数逻辑
//
button1.Text = "demo";
label1.Text = "Hello!";
label2.Text = "Goodbye!";
} protected override void CreateChildControls()
{
Controls.Add (label1);
Controls.Add (label2);
Controls.Add(button1); base.CreateChildControls();
}
protected override void Render(HtmlTextWriter output)
{ this.label1.RenderControl(output);
this.label2.RenderControl(output); this.button1.RenderControl(output);
}
}
我确实是想在设计期间看见用代码添加的组件.因为我想做一个GroupBox.
请问就没有解决办法吗?
Button bt=new Button();
this.panel.Control.Add(bt);需要一个容器承载这个控件
protected override void RenderChildren(HtmlTextWriter writer)
{
button.RenderControl(writer);
}
你好,其实如果从Panel继承,用override RenderChildren的方法也是没办法解决的
你好,
我根据你指的url(http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=94dd4aac.0302240954.62a3b347%40posting.google.com),把那个例子搬了下来,但是一直出错,我又照着做了一个,还是有问题:我设计了一个设计器,从ReadWriteControlDesigner继承
请问为什么我在获取这个设计器的DesignTimeElement属性时,一直为空呢?
而且为什么线程也没有执行?
class MyDesignerClass : ReadWriteControlDesigner, IDisposable
{ System.Web.UI.Design.ReadWriteControlDesigner c;
string ret;
private string _html;
private Thread _th;
mshtml.IHTMLElement element; private void parsecrtls()
{
mshtml.IHTMLElement e; while(true)
{
try
{
e = (mshtml.IHTMLElement)this.DesignTimeElement;
System.Diagnostics.Debug.WriteLine(a);
if(e.innerHTML != this._html)
{
OninnerContentChange(e.innerHTML);
this._html = e.innerHTML;
}
}
catch(Exception ex)
{
throw ex;
}
Thread.Sleep(50);
}
}
public MyDesignerClass()
:base()
{
//问题一:线程不执行,因为在这里不出错
this._html = "";
_th = new Thread(new ThreadStart(parsecrtls));
_th.Priority = ThreadPriority.Highest;
_th.Start();
//----------------------------- //问题二:DesignTimeElement为null,因为它出错
if(this.DesignTimeElement == null)
{
element = (mshtml.IHTMLElement)this.DesignTimeElement;
element.innerText = "<table><tr><td>abcdefg</td></tr><table>"; //这里出错
}
//--------------------------------------------
}
protected void Displose()
{
base.Dispose();
this._th.Abort();
} protected void OninnerContentChange(System.String innerContent)
{
innerContent = innerContent + "*";
} public override bool AllowResize
{
get
{
return true;
}
}
}