如何在转发器中设置dropDownList的选定项？
转发器绑定到repeaterData DataTable,dropDownList绑定到后面的代码中的dropDownList DataTable.我需要将DropDownList的SelectedValue属性设置为repeaterData表中的字段值.
这就是我尝试过的：
<asp:Repeater runat="server" ID="myRepeater>
<ItemTemplate>
<asp:DropDownList runat="server" CssClass="fullSelect" ID="degree_dropdown"
AppendDataBoundItems="true"
selectedValue='<%#DataBinder.Eval(Container.DataItem,"degreeCode")%>'>
<asp:ListItem Text="Select Degree" />
</asp:DropDownList>
</ItemTemplate>
</asp:Repeater>
填充转发器的代码：
myRepeater.DataSource = myRepeaterData; //myRepeaterData is a datatable myRepeater.DataBind();
用于填充下拉列表的代码：
protected void educationPopup_repeater_ItemDataBound(object sender,RepeaterItemEventArgs e)
{
DropDownList degree_dropdown = e.Item.FindControl("degree_dropdown") as DropDownList;
if (degree_dropdown != null)
{
degree_dropdown.DataSource = degrees; //a datatable
degree_dropdown.DataTextField = "degree";
degree_dropdown.DataValueField = "code";
degree_dropdown.DataBind();
}
}
解决方法
你快到了.您只需要将DataItem转换为DataRowView,并将其分配给DropDownList,如下所示 –
protected void myRepeater_ItemDataBound(object sender,RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
var degree_dropdown = e.Item.FindControl("degree_dropdown") as DropDownList;
string degreeCode = (string) ((DataRowView) e.Item.DataItem)["degreeCode"];
if (degree_dropdown != null)
{
degree_dropdown.DataSource = degrees; //a datatable
degree_dropdown.DataTextField = "degree";
degree_dropdown.DataValueField = "code";
degree_dropdown.DataBind();
if (degree_dropdown.Items.FindByValue(degreeCode) != null)
degree_dropdown.SelectedValue = degreeCode;
}
}
}
