在我的应用程序中,当我编辑网格视图中的一行时,我会从下拉列表中选择一些新数据。
我是这样填充下拉列表的:
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
DropDownList emailsListDL = (DropDownList)e.Row.FindControl("emailsDL");
emailsListDL.DataSource = allUsersEmails;//list of strings with the emails of the users
emailsListDL.DataBind();
}
}
}
但是当我从模板按下“更新”按钮并进入“RowUpdating”事件时,下拉列表中选择的值每次都是该下拉列表中的第一个值。
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
DropDownList emailsListDL = (DropDownList)GridViewAdvertisers.Rows[e.RowIndex].FindControl("emailsDL");
string email = emailsListDL.SelectedValue; //the selected value is every time the first value from the dropdownlist
}
有人有什么想法吗?
我尝试了很多方法在“RowDataBound”事件中设置所选值,但没有成功。我尝试了这个:
1. emailsListDL.SelectedIndex = emailsListDL.Items.IndexOf(emailsListDL.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "OwnerMail").ToString()));
2. emailsListDL.SelectedValue = GridViewAdvertisers.DataKeys[e.Row.RowIndex]["OwnerMail"].ToString();
3. emailsListDL.SelectedValue = GridViewAdvertisers.Rows[e.Row.RowIndex].Cells[1].Text;
//ownerMail is a string (object) from the list of objects that I put as datasource to the gridview
谢谢,Jeff
更新
我的aspx页面中的项模板如下:
<asp:TemplateField ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle"
ItemStyle-Width="150px" HeaderText="Owner Email" HeaderStyle-HorizontalAlign="Left"
HeaderStyle-BorderWidth="1px" HeaderStyle-BorderColor="#e1e1e1">
<ItemTemplate>
<asp:Label ID="LabelEmail" runat="server" Text='<%# Bind("OwnerMail")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="emailsDL" runat="server" Width="150">
</asp:DropDownList>
</EditItemTemplate>
<HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" Font-Bold="True"></HeaderStyle>
<ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="180px" BorderWidth="1px"
BorderColor="#e1e1e1"></ItemStyle>
</asp:TemplateField>
!Page.IsPostback
的情况下才进行绑定?你应该只在第一次绑定时以及在更改数据源之后进行绑定。 - Tim Schmelter