我有一个ASP.Net网页,其中包含实现IPostBackEventHandler接口多重控制。 代码的简化版本给出如下:
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//Custom Control
MyTextBox mytxt = new MyTextBox();
mytxt.ID = "mytxt";
mytxt.TextChange += mytxt_TextChange;
this.Form.Controls.Add(mytxt);
//Custom Control
MyButton mybtn = new MyButton();
mybtn.ID = "mybtn";
mybtn.Click += mybtn_Click;
this.Form.Controls.Add(mybtn);
}
void mybtn_Click(object sender, EventArgs e)
{
Response.Write("mybtn_Click");
}
void mytxt_TextChange(object sender, EventArgs e)
{
Response.Write("mytxt_TextChange");
}
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
public class MyTextBox : Control, IPostBackEventHandler
{
public event EventHandler TextChange;
protected virtual void OnTextChange(EventArgs e)
{
if (TextChange != null)
{
TextChange(this, e);
}
}
public void RaisePostBackEvent(string eventArgument)
{
OnTextChange(new EventArgs());
}
protected override void Render(HtmlTextWriter output)
{
output.Write("<input type='text' id='" + ID + "' name='" + ID + "' onchange='__doPostBack('" + ID + "','')' />");
}
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
public class MyButton : Control, IPostBackEventHandler
{
public event EventHandler Click;
protected virtual void OnClick(EventArgs e)
{
if (Click != null)
{
Click(this, e);
}
}
public void RaisePostBackEvent(string eventArgument)
{
OnClick(new EventArgs());
}
protected override void Render(HtmlTextWriter output)
{
output.Write("<input type='button' id='" + ID + "' name='" + ID + "' value='Click Me' onclick='__doPostBack('" + ID + "','')' />");
}
}
有2个自定义控件 - MyTextBox&myButton的实现IPostBackEventHandler接口。 MyTextBox有TextChange事件,则myButton有Click事件。
如果我把页面(MyTextBox或为myButton)上只有一个控制 - 事件火属性。 但随着网页上同时控制MyTextBox TextChange事件越来越甚至单击myButton的后解雇。 该myButton的Click事件时MyTextBox在页面上不会被解雇。
我在这里张贴之前已经试过许多东西。 先谢谢您的帮助。