如何找出哪個按鈕觸發了回發？

Question

在asp.net（c＃）中，我如何找出哪個asp：button觸發了回發？

我將其用於動態控件，並希望對不同按鈕的頁面加載執行不同的處理。 我嘗試查看__EVENTARGUMENTS等，但是它們沒有起作用。

我正在尋找做這樣的事情：

Page_load案例：單擊按鈕1 //做某事按鈕2單擊//做某事

Answer 1

使用下面的代碼。

  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;
        }

調用此函數：

我已經將上述函數包含在靜態類UtilityClass中。

String postBackControlId = UtilityClass.GetPostBackControlId(this);

該代碼已從Mahesh的Blog中引用。