如何找出触发回发的按钮
本文关键字:按钮 何找出 | 更新日期: 2023-09-27 18:37:12
在 asp.net(c#)中,如何找出哪个asp:按钮触发了回发?
我正在将其用于动态控件,并希望在页面加载上为不同的按钮执行不同的过程。我试过查看__EVENTARGUMENTS等,但它们不起作用。
我想做这样的事情:
Page_load箱:按钮 1 已单击。做点什么按钮 2 已单击。做点什么
使用以下代码。
public static string GetPostBackControlId(this Page page)
{
if (!page.IsPostBack)
return string.Empty;
Control control = null;
// first we will check the "__EVENTTARGET" because if post back made by the controls
// which used "_doPostBack" function also available in Request.Form collection.
string controlName = page.Request.Params["__EVENTTARGET"];
if (!String.IsNullOrEmpty(controlName))
{
control = page.FindControl(controlName);
}
else
{
// if __EVENTTARGET is null, the control is a button type and we need to
// iterate over the form collection to find it
// ReSharper disable TooWideLocalVariableScope
string controlId;
Control foundControl;
// ReSharper restore TooWideLocalVariableScope
foreach (string ctl in page.Request.Form)
{
// handle ImageButton they having an additional "quasi-property"
// in their Id which identifies mouse x and y coordinates
if (ctl.EndsWith(".x") || ctl.EndsWith(".y"))
{
controlId = ctl.Substring(0, ctl.Length - 2);
foundControl = page.FindControl(controlId);
}
else
{
foundControl = page.FindControl(ctl);
}
if (!(foundControl is Button || foundControl is ImageButton)) continue;
control = foundControl;
break;
}
}
return control == null ? String.Empty : control.ID;
}
调用此函数:
我已经将上述函数包含在静态类 UtilityClass 中。
String postBackControlId = UtilityClass.GetPostBackControlId(this);
该代码已引用自 Mahesh 的博客。