[英]Asp.Net / C# - How to get the Text of a Label control nested inside a Repeater?
I am trying to get the text of my label which is inside a repeater, but I keep getting a NullPointerException
. 我正在尝试获取位于转发器内的标签的文本,但是我一直在获取
NullPointerException
。
All of the data is coming from database and it is coming correctly. 所有数据都来自数据库,并且数据正确无误。
When I click on the LinkButton, I want to use the Label Text for next bit code. 当我单击LinkButton时,我想将标签文本用于下一个位代码。
Aspx page: Aspx页面:
<asp:Repeater ID="RepeaterDepartmentParent" runat="server">
<ItemTemplate>
<div id="outerDiv" class="col-lg-3 col-xs-6" runat="server">
<!-- small box -->
<div>
<div class="inner">
<p>
<%# DataBinder.Eval(Container.DataItem, "Department_Namestr")%>
</p>
</div>
<asp:Label ID="lblDepartmentId" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "Department_Idint")%>' Visible="true"></asp:Label>
<asp:LinkButton ID="linkChildDepartment" CommandName="Click" runat="server" CssClass="small-box-footer" OnClick="linkChildDepartment_Click">More info<i class="fa fa-arrow-circle-right"></i></asp:LinkButton>
</div>
</div><%--<%-- ./col -->--%>
</ItemTemplate>
</asp:Repeater>
Code Behind: 背后的代码:
protected void Page_Load(object sender, EventArgs e)
{
DataSet dsParentDepartment = null;
dsParentDepartment = objDepartmentBL.viewDepartmentparent();
RepeaterDepartmentParent.DataSource = dsParentDepartment.Tables[0];
RepeaterDepartmentParent.DataBind();
}
protected void linkChildDepartment_Click(Object sender, EventArgs e)
{
//what to write here??
//i have tried the bellow code but it gives me every data in that loop but i
//want the single data for a link button click.
//foreach (RepeaterItem item in RepeaterDepartmentParent.Items)
// {
// Label myLabel = (Label)item.FindControl("lblDepartmentId");
// myLabel.Text = Id;
//}
//edited code that works properly
LinkButton linkChildDepartment = (LinkButton)sender;
RepeaterItem item = (RepeaterItem)linkChildDepartment.NamingContainer;
Label myLabel = (Label)item.FindControl("lblDepartmentId");
}
How can I correctly reference the Link Button Label Text? 如何正确引用链接按钮标签文本?
You can use the NamingContainer
property to get the reference of the RepeaterItem
. 您可以使用
NamingContainer
属性获取RepeaterItem
的引用。 From there it's a short way to your label: 从那里到标签的捷径很短:
protected void linkChildDepartment_Click(Object sender, EventArgs e)
{
LinkButton linkChildDepartment = (LinkButton) sender;
RepeaterItem item = (RepeaterItem) linkChildDepartment.NamingContainer;
Label myLabel = (Label)item.FindControl("lblDepartmentId");
// ...
}
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