如何在Gridview中填充下拉列表？

Question

我在gridview模板字段中有一個下拉列表。

<asp:templatefield headertext="Bill Period">
<itemtemplate>
<asp:dropdownlist runat="server" id="cboBillPeriod"></asp:dropdownlist>
</itemtemplate>
</asp:templatefield>

我想填充下拉菜單，我可以嗎？ 能幫我嗎

Answer 1

您可以按以下方式綁定GridView的OnRowDataBound事件中的下拉列表：

網格視圖：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"  OnRowDataBound="OnRowDataBound">
    <Columns>
        <asp:BoundField HeaderText="Name" DataField="ContactName" />
        <asp:TemplateField HeaderText = "Country">
            <ItemTemplate>
                <asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>' Visible = "false" />
                <asp:DropDownList ID="ddlCountries" runat="server">
                </asp:DropDownList>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

背后的代碼：

借助FindControl方法，您將能夠獲得下拉控件，然后可以使用該控件。

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        //Find the DropDownList in the Row
        DropDownList ddlCountries = (e.Row.FindControl("ddlCountries") as DropDownList);
        ddlCountries.DataSource = GetData("SELECT DISTINCT Country FROM Customers");
        ddlCountries.DataTextField = "Country";
        ddlCountries.DataValueField = "Country";
        ddlCountries.DataBind();

        //Add Default Item in the DropDownList
        ddlCountries.Items.Insert(0, new ListItem("Please select"));

        // Select the Country of Customer in DropDownList
        string country = (e.Row.FindControl("lblCountry") as Label).Text;
        ddlCountries.Items.FindByValue(country).Selected = true;
    }
}

Answer 2

您必須使用網格視圖的RowDataBound事件。 有關更多信息，請檢查該鏈接 。

Answer 3

您可以將其用於gridview中的下拉菜單。

  <asp:TemplateField HeaderText="Item Condition" HeaderStyle-Width="80px" HeaderStyle-HorizontalAlign="Center" ItemStyle-Width="40px>
          <ItemTemplate>
            <asp:DropDownList ID="ddlConditions" runat="server" >  
            </asp:DropDownList>
          </ItemTemplate>
        </asp:TemplateField>

在網格“ RowDataBound”事件下，您將使用下拉列表ID將下拉列表綁定到代碼中。

DropDownList ddlConditions2 = (e.Row.FindControl("ddlConditions") as DropDownList);
                DataTable dt = _reader.GetDataTableByCommandFromStoredProc("getYourDropdownData");
                ddlConditions2.DataSource = dt;
                ddlConditions2.DataTextField = "ConditionName";
                ddlConditions2.DataValueField = "Id";
                ddlConditions2.DataBind();
                ddlConditions2.Items.Insert(0, new ListItem("--Select--", "0"));

Answer 4

在Gridview Rowdatabound事件中，嘗試綁定您的下拉列表。