C# 在asp:repeater on按钮单击事件中查找控件
我在asp:repeater项目模板中有一个下拉列表。 如何在按钮单击事件中获取其值C# 在asp:repeater on按钮单击事件中查找控件,c#,asp.net,C#,Asp.net,我在asp:repeater项目模板中有一个下拉列表。 如何在按钮单击事件中获取其值 <asp:Repeater runat="server" ID="WorkflowListAfter" onitemcreated="WorkflowListAfterItemCreated"> <ItemTemplate> <asp:DropDownList ID="ddlWorkflowMembers" runat="server" DataTextF
<asp:Repeater runat="server" ID="WorkflowListAfter" onitemcreated="WorkflowListAfterItemCreated">
<ItemTemplate>
<asp:DropDownList ID="ddlWorkflowMembers" runat="server" DataTextField="MemberName" DataValueField="MemberID">
</ItemTemplate>
</asp:Repeater>
protected DropDownList ddlWorkflowMembers = new DropDownList();
protected void WorkflowListAfterItemCreated(object sender, RepeaterItemEventArgs e)
{
ddlWorkflowMembers = (DropDownList) e.Item.FindControl("ddlWorkflowMembers");
}
protected void BtnSaveClick(object sender, EventArgs e) {
if (ddlWorkflowMembers.SelectedItem == null) return;
}
受保护的DropDownList ddlWorkflowMembers=新的DropDownList();
受保护的无效WorkflowListAfterItemCreated(对象发送方,RepeaterItemEventTarget)
{
ddlWorkflowMembers=(DropDownList)e.Item.FindControl(“ddlWorkflowMembers”);
}
受保护的无效BtnSaveClick(对象发送方,事件参数e){
if(ddlWorkflowMembers.SelectedItem==null)返回;
}
上面的代码在第一次工作时,但在回发ddlWorkflowMembers之后,总是为null expersion。假设
BtnSave
也在中继器内
您可以通过按下按钮的按钮来获得RepeaterItem
。然后,您可以使用FindControl
获取对您的DropDownList
的引用:
protected void BtnSaveClick(object sender, EventArgs e) {
var btn = (Button)sender;
var item = (RepeaterItem)btn.NamingContainer;
var ddl = (DropDownList) item.FindControl("ddlWorkflowMembers");
// ...
}
如果按钮位于中继器外部,并且您希望保存所有项目,则需要循环浏览所有:
protected void BtnSaveClick(object sender, EventArgs e) {
foreach(RepeaterItem item in WorkflowListAfter.Items)
{
var ddl = (DropDownList) item.FindControl("ddlWorkflowMembers");
// ...
}
}
回发后您是否正在执行
WorkflowListAfter.DataBind()
?否。仅在WorkflowListAfterItemCreated(){…}