GridView中的Dropdownlist不會觸發selectedindex更改事件

我沒有觸發gridview中dropdownlist的選定索引更改事件的問題。我通過了SO Thread。這完全不適合我。我有如下實現。GridView中的Dropdownlist不會觸發selectedindex更改事件

.ASPX

<asp:DropDownList ID="DDL1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="DDL1_SelectedIndexChanged"> 
    <asp:ListItem Text="Review" Value="Review" Selected="True">Review</asp:ListItem> 
    <asp:ListItem Text="Level1" Value="lvl1">Send Back to Level1</asp:ListItem> 
</asp:DropDownList>

.CS

protected void Page_Load(object sender, EventArgs e) 
    { 
    if(!Page.IsPostBack) 
    { 
    // Bind the GridView to something. 
     DataBindGrid(); 
    } 
else { 
    // Bind the GridView again to maintain previous entered data in the gridview 
     DataBindGrid(); 
    } 
    } 

    protected void DDL1_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     this.lblCity.Text = ((DropDownList)sender).SelectedValue; 
    } 

protected void grdPoll_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    if(Page.IsPostBack) 
    { 
    if(e.Row.RowType == DataControlRowType.DataRow) 
    { 
     DropDownList ddl = e.Row.FindControl("DDL1") as DropDownList; 
     if(ddl != null) 
     { 
     ddl.SelectedIndexChanged += new EventHandler(DDL1_SelectedIndexChanged); 
     } 
    } 
    } 
}

當我保持if(!Page.IsPostBack)塊才把它工作正常。但我也想else塊。實施過程出了什麼問題。您可以請建議解決方案

來源

2012-11-27 Rajaram Shelar

問題是！!..IsPostBack塊，這不是事件其他部分，如你所說的。您在回帖時再次綁定網格，導致該活動被解僱。您不必再次綁定它以在網格中進行更改。

刪除這段代碼。

{ 
    // Bind the GridView again to maintain previous entered data in the gridview 
    DataBindGrid(); 
}

來源

2012-11-27 07:33:43 Adil

我想再次綁定它回傳我在哪裏分配不同的更新的數據源的GridView –

然後替換事件名稱「的Page_Load」應該綁定它在某些情況下，而不是Page_load可能在DDL1_SelectedIndexChanged – Adil

試試這個：

protected void Page_Load(object sender, EventArgs e) 
{ 
    if(!Page.IsPostBack) 
    { 
    // Bind the GridView to something. 
     DataBindGrid(); 
    } 
else { 
    // Bind the GridView again to maintain previous entered data in the gridview 
     //DataBindGrid(); //remove DataBindGrid(); from else 
    } 
} 

protected void DDL1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    this.lblCity.Text = ((DropDownList)sender).SelectedValue; 
    DataBindGrid(); 
}

來源

2012-11-27 08:51:15

網格應該要在回發時綁定.. –

remove DataBindGrid（）;從DDL1_SelectedIndexChanged事件和caode放入if（！Page.IsPostBack） //將GridView綁定到某物。 DataBindGrid（）; } else { //再次綁定GridView以保持gridview中的先前輸入的數據 DataBindGrid（）; } –

-1

與「Page_PreRender」

來源

2012-11-27 09:36:24

GridView中的Dropdownlist不會觸發selectedindex更改事件

回答

相關問題