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    <p>You have a couple of options.</p> <p>The easiest one is to expose a public property on the user control that will let you do this:</p> <pre><code>&lt;cuc1:CourseUserControl ID="CourseUserControl1" runat="server" CourseCategoryID='&lt;%# (int)Eval("CourseCatID") %&gt;' /&gt; </code></pre> <p>Then databind in the user control as soon as that property is assigned to. Note that I'm assuming the category is an Int32. For example (note that the CourseCategoryID stores its value in a private field, not in ViewState):</p> <pre><code>private int _courseCategoryID; public int CourseCategoryID { get { return _courseCategoryID; } set { _courseCategoryID = value; // TODO: code that initializes the GridView in user control. this.DataBind(); } } </code></pre> <p>Your other option is to expose the same property and handle the RowDataBound event and do this:</p> <pre><code>if (e.Row.RowType == DataControlType.DataRow) { CourseUserControl courseDetails; courseDetails = (CourseUserControl)e.Row.FindItem("CourseUserControl1"); // Assuming category ID is Int32 courseDetails.CourseCategoryID = (int)grdCategory.DataKeys[e.Row.RowIndex].Value; courseDetails.DataBind(); } </code></pre> <p>Note that I'm databinding manually instead of immediately after assigning a new category to the user control in the current row.</p> <p>For more information, see: <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowdatabound%28v=vs.90%29.aspx" rel="nofollow">GridView.RowDataBound Event (ASP.NET 3.5)</a> or <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.rowdatabound%28v=vs.100%29.aspx" rel="nofollow">GridView.RowDataBound Event (ASP.NET 4.0)</a></p>
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    1. COThanks a lot sir for your quick reply but i solve it myself via creating it manually. Using Dim courseUC As CourseUserControl = LoadControl("~/CourseUserControl.ascx") But thanks anyway
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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