Question

我已经阅读了本网站和其他网站上的其他问题，但其中没有一个有效。我的EXPLAIN ANALYSE中有两列，在点击编辑链接时应该成为GridView。他们确实变成DropDownList但从未获得任何数据。我确实放了一个DropDownList，但这也没有给我任何帮助。我试图通过使用另一个函数显式绑定它，但我一直没有返回任何值。这是我的代码：

ASPX：

RowDataBound

代码背后：

<asp:GridView ID="dgvGameFIFolderMaintenance" runat="server" AutoGenerateColumns="false" 
CssClass="ReportDataGrid" HeaderStyle-CssClass="DataGridHeader" FooterStyle-CssClass="NoShade" 
RowStyle-CssClass="AccentShade" AlternatingRowStyle-CssClass="NoShade" SelectedRowStyle-CssClass="AccentLvl3" 
PagerSettings-Mode="NumericFirstLast" PagerStyle-HorizontalAlign="Center" PagerStyle-CssClass="paging" 
PageSize="25" AllowSorting="false" ShowFooter="true" ShowHeaderWhenEmpty="true" AllowPaging="true" 
Width="900px" OnRowCancelingEdit="CancelEditRecord" OnRowEditing="EditRecord" OnRowUpdating="UpdateRecord"> 
    <Columns>
    <asp:TemplateField HeaderText="Account ID" ItemStyle-Width="110px">
    <ItemTemplate>
    <asp:Label ID="lblAccountID" runat="server" Text='<%#Eval("Account_ID")%>'></asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
    <asp:TextBox ID="txtAccountID" runat="server" Text='<%#Eval("Account_ID")%>'></asp:TextBox>
    </EditItemTemplate>
    <FooterTemplate>
    <asp:TextBox ID="txtAccountIDFT" runat="server"></asp:TextBox>
    </FooterTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="File Type" ItemStyle-Width="110px">
    <ItemTemplate>
    <asp:Label ID="lblFileType" runat="server" Text='<%#Eval("FileType")%>'></asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
    <asp:Label ID="lblFileType" runat="server" Text='<%#Eval("FileType")%>' Visible="false"></asp:Label>
    <asp:DropDownList ID="ddlFileType" runat="server"></asp:DropDownList>
    </EditItemTemplate>
    <FooterTemplate>
    <asp:DropDownList ID="ddlFileTypeFT" runat="server" Width="98%"></asp:DropDownList>
    </FooterTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Drop Location" ItemStyle-Width="110px">
    <ItemTemplate>
    <asp:Label ID="lblDropLocation" runat="server" Text='<%#Eval("DropLocation")%>'></asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
    <asp:TextBox ID="txtDropLocation" runat="server" Text='<%#Eval("DropLocation")%>'></asp:TextBox>
    </EditItemTemplate>
    <FooterTemplate>
    <asp:TextBox ID="txtDropLocationFT" runat="server"></asp:TextBox>
    </FooterTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Product" ItemStyle-Width="110px">
    <ItemTemplate>
    <asp:Label ID="lblProduct" runat="server" Text='<%#Eval("Product")%>'></asp:Label>
    </ItemTemplate>
    <EditItemTemplate>
    <asp:Label ID="lblProduct" runat="server" Text='<%#Eval("Product")%>' Visible="false"></asp:Label>
    <asp:DropDownList ID="ddlProduct" runat="server"></asp:DropDownList>
    </EditItemTemplate>
    <FooterTemplate>
    <asp:DropDownList ID="ddlProductFT" runat="server" Width="98%"></asp:DropDownList>
    </FooterTemplate>
     <asp:TemplateField HeaderText="Delete">
    <ItemTemplate>
    <asp:LinkButton ID="btnDelete" runat="server" CommandName="Delete" Text="Delete"
    OnClientClick="retrun confirm('Are you sure you want to delete?');"></asp:LinkButton>
    </ItemTemplate>
    <FooterTemplate>
    <asp:Button ID="btnAdd" runat="server" CommandName="AddNew" Text="Add" OnClick="AddNewRecord" />
    </FooterTemplate>
    </asp:TemplateField>
    <asp:CommandField ButtonType="Link" ShowEditButton="true" HeaderText="Edit" EditText="Edit" />
    </Columns>
    </asp:GridView>

Answer 1

Dim ddLFileType As DropDownList = TryCast(dgvGameFIFolderMaintenance.FooterRow.FindControl("ddLFileType"), DropDownList)
Dim ddLProduct As DropDownList = TryCast(dgvGameFIFolderMaintenance.FooterRow.FindControl("ddLProduct"), DropDownList)

在编辑项目模板中声明页脚时，您正在寻找页脚中的ddLProduct和ddLFileType。

在你的RowDataBound中，你应该只能切换到使用当前行。

Dim ddLFileType As DropDownList = TryCast(e.Row.FindControl("ddLFileType"), DropDownList)
Dim ddLProduct As DropDownList = TryCast(e.Row.FindControl("ddLProduct"), DropDownList)

GridView EditItemTemplate中的DropDownList未填充数据

1 个答案: