捕獲DropDownList索引更改網格內部的事件

我想捕獲SelectedIndexChanged事件的下拉列表，我已經放入了一個GridView控件。它回發很好，但不會進入我的SelectedIndexChanged事件處理程序。這裏是我的代碼捕獲DropDownList索引更改網格內部的事件

DropDownList myddl; 
    protected void Page_Load(object sender, EventArgs e) 
    { 
     this.myGridview.RowDataBound += new GridViewRowEventHandler(myGridview_RowDataBound); 
     myddl = new DropDownList(); 
     myddl.SelectedIndexChanged += new EventHandler(myddl_SelectedIndexChanged); 
     if (!Page.IsPostBack) 
     { 
      List<Team> teams = giveMeTeams(); 
      this.myGridview.DataSource = teams; 
      this.myGridview.AutoGenerateColumns = false; 

      BoundField col1 = new BoundField(); 
      col1.DataField = "Name"; 
      this.myGridview.Columns.Add(col1); 

      BoundField col2 = new BoundField(); 
      col2.DataField = "Sport"; 
      this.myGridview.Columns.Add(col2); 

      BoundField col3 = new BoundField(); 
      col3.DataField = "Status"; 
      this.myGridview.Columns.Add(col3); 

      this.myGridview.DataBind(); 
     } 
    } 

    void myGridview_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     myddl = new DropDownList(); 
     myddl.SelectedIndexChanged += new EventHandler(myddl_SelectedIndexChanged); 
     List<string> items = new List<string>(); 
     items.Add("good"); 
     items.Add("bad"); 
     myddl.DataSource = items; 
     myddl.AutoPostBack = true; 
     myddl.DataBind(); 
     e.Row.Cells[2].Controls.Add(myddl); 
    } 

    void myddl_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     string temp = "In Here"; //neve hits this code 
    } 

    private List<Team> giveMeTeams() 
    { 
     Teams teams = new Teams(); 
     teams.Add(new Team("RedWings", "Hockey", "good")); 
     teams.Add(new Team("Lions", "Football", "bad")); 
     teams.Add(new Team("Packers", "Football", "good")); 
     return teams; 
    }

任何幫助，非常感謝。謝謝，

編輯基於評論

如你所說......而且我還沒有捕捉回來後我都試過了。這裏是我的新代碼

 void myGridview_RowCreated(object sender, GridViewRowEventArgs e) 
    { 
     DropDownList myddl = new DropDownList(); 
     myddl = new DropDownList(); 
     myddl.SelectedIndexChanged += new EventHandler(myddl_SelectedIndexChanged); 
     myddl.ID = "MyID" + e.Row.RowIndex.ToString(); 
     e.Row.Cells[2].Controls.Add(myddl); 
    } 

    void myGridview_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     DropDownList myddl = e.Row.FindControl("MyID" + e.Row.RowIndex.ToString()) as DropDownList; 
     //myddl.SelectedIndexChanged += new EventHandler(myddl_SelectedIndexChanged); 
     List<string> items = new List<string>(); 
     items.Add("good"); 
     items.Add("bad"); 
     myddl.DataSource = items; 
     myddl.DataMember = "Status"; 
     myddl.AutoPostBack = true; 
     myddl.DataBind(); 
     e.Row.Cells[2].Controls.Add(myddl); 
    }

它仍然沒有進入我的myddl_SelectedIndexChanged（）事件處理程序。

來源

2011-03-16 mikemurf22

創建網格的RowCreated中的Dropdownlist併爲其分配一個ID。通過e.Row.FindControl("MyDropdownlistID")獲取RowDataBound中的這些下拉菜單並將它們綁定到數據源。創建不同的Dropdownlist實例，而不是引用總是相同的

來源

2011-03-16 22:33:18

感謝您的回覆....我剛剛嘗試了您的建議 – mikemurf22 2011-03-17 18:23:37

我用我的新代碼更新了原始問題。還是行不通。任何想法我失蹤？ – mikemurf22 2011-03-17 18:30:31

@ mikemurf22：您不必將RowIndex追加到DDL的ID，它只能是GridViewRow（它們的NamingContainer）的唯一內容。 ASP.Net自動生成唯一的ID，您可以通過FindControl（「MyID」）在RowDataBound中找到它們。但主要的問題是你在RowDataBound中再次添加它們。它們將在RowCreated的每個回傳中重新創建。刪除行e.Row.Cells [2] .Controls.Add（myddl）;'。你還必須在RowCreated和RowDatabound中嵌套你的代碼，在if（e.RowTypeRowType == DataControlRowType.DataRow）{ }' – 2011-03-17 19:32:29

捕獲DropDownList索引更改網格內部的事件

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