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

如何找出触发回发的按钮

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