gridview控件中插入dropdownlist控件，如何找到該行的ID

    問題描述：在gridview控件中插入dropdownlist控件，想要直接通過dropdownlist控件選擇“優、良、中、差、及格、不及格”批改實驗報告，要保存批改結果，需要加個OnSelectedIndexChanged事件，但是在寫事件時，要保存實驗報告結果，需要知道選擇的這一行所對應的ID，直接寫卻不行。

    解決方法：利用parent屬性。

        //
        // 摘要:
        //     獲取對頁 UI 層次結構中服務器控件的父控件的引用。
        //
        // 返回結果:
        //     對服務器控件的父控件的引用。
        [Bindable(false)]
        [Browsable(false)]
        [DesignerSerializationVisibility(0)]
        public virtual Control Parent { get; }

 

    MngRep.asp--實驗報告管理頁面

<asp:GridView runat="server" ID="gvMngRep" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="True" PageSize="20" OnPageIndexChanging="gvMngRep_PageIndexChanging" OnRowDataBound="gvMngRep_RowDataBound"> <Columns> <asp:BoundField HeaderText="序號"/> <asp:BoundField DataField="ID" /> <asp:BoundField DataField="ExpId" /> <asp:BoundField DataField="UploadStatus" HeaderText="提交狀態" /> <asp:BoundField DataField="ScoreStatus" HeaderText="批改狀態" /> <asp:BoundField DataField="StuNum" HeaderText="學號" /> <asp:BoundField DataField="ExpName" HeaderText="實驗名" /> <asp:BoundField DataField="SubmitTime" headerText="提交時間"/> <asp:TemplateField HeaderText="查看實驗報告"> <ItemTemplate> <asp:HyperLink ID="LikReport" runat="server" Text="查看實驗報告" NavigateUrl ='<%# "~/Reports/"+Eval("Path") %>'></asp:HyperLink> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="成績"> <ItemTemplate> <asp:DropDownList ID="ddlScore" runat="server" OnSelectedIndexChanged="ddlScore_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList> <%--<asp:Button ID="btnScore" runat="server" text="打分" OnClick="btnScore_Click()"/>--%> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="上傳已批報告"> <ItemTemplate> <asp:HyperLink ID="hlUpload" runat="server"></asp:HyperLink> </ItemTemplate> </asp:TemplateField> </Columns> <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> <RowStyle BackColor="#EFF3FB" /> <EditRowStyle BackColor="#2461BF" /> <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" /> <PagerStyle BackColor="#507CD1" ForeColor="White" HorizontalAlign="Center" /> <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> <AlternatingRowStyle BackColor="White" /> </asp:GridView>

    MngRep.aspx.cs代碼

protected void ddlScore_SelectedIndexChanged(object sender,System.EventArgs e) { Hashtable ht = new Hashtable(); DropDownList ddl = (DropDownList)sender; TableCell cell = (TableCell)ddl.Parent; GridViewRow row = (GridViewRow)cell.Parent; ht.Add("Score", SqlStringFormat.GetQuotedString(((DropDownList)sender).SelectedItem.Text.ToString())); int id=Convert.ToInt32(row.Cells[1].Text.ToString()); ReportInfo repupdate = new ReportInfo(); repupdate.UpdateRep(ht, id); InitData(); }

最主要的代碼就是

        DropDownList ddl = (DropDownList)sender;
        TableCell cell = (TableCell)ddl.Parent;
        GridViewRow row = (GridViewRow)cell.Parent;

通過parent屬性，逐步找到這一行，在通過row.Cells[1].Text.ToString()找到對應的單元格的數據。