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POHow to handle empty return from database with gridview?
 

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  1. POHow to handle empty return from database with gridview?
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    <p>I have a gridview that is bound to an ObjectDataSource, which retrieves records from a database to display in the gridview. The procedure for returning the records takes in a search string and displays the relevant results. However when there are no results from the database, I get an empty gridview with the page numbers along the bottom, as if it returned all the records from the database, as shown in the pic below:</p> <p><img src="https://i.stack.imgur.com/jP87l.jpg" alt="enter image description here"></p> <p>I have set both the EmptyDataText and EmptyDataTemplate properties, but they do not show when there are no results.</p> <p>Anyone know what's going on here?</p> <p>Here's the asp for the ObjectDataSource and GridView:</p> <pre><code>&lt;asp:ObjectDataSource ID="ObjectDataSource1" runat="server" EnablePaging="True" SelectCountMethod="GetUsersCount" SelectMethod="GetUsers" SortParameterName="sortColumn" TypeName="WebsiteBuilder.Core.UUser" OnSelecting="ObjectDataSource1_Selecting"&gt; &lt;SelectParameters&gt; &lt;asp:Parameter Name="searchExpression" Type="String" DefaultValue="" /&gt; &lt;/SelectParameters&gt; &lt;/asp:ObjectDataSource&gt; &lt;asp:GridView ID="grdUsers" runat="server" CssClass="grdUsers" AutoGenerateColumns="false" OnDataBound="grdUsers_DataBound" DataSourceID="ObjectDataSource1" AllowPaging="true" AllowSorting="true" OnRowCommand="grdUsers_RowCommand" PageSize="5" EmptyDataText="No Results"&gt; &lt;PagerSettings FirstPageText="First" LastPageText="Last" Mode="NumericFirstLast" PageButtonCount="5" Position="Bottom" /&gt; &lt;PagerStyle CssClass="pagination" HorizontalAlign="Center" VerticalAlign="Middle" /&gt; &lt;EmptyDataTemplate&gt;No Results&lt;/EmptyDataTemplate&gt;` </code></pre> <p>Here is the code for the selecting event:</p> <pre><code> protected void ObjectDataSource1_Selecting(object sender, ObjectDataSourceSelectingEventArgs e) { if (!String.IsNullOrEmpty(this.txtSearchBox.Text)) { e.InputParameters["searchExpression"] = "%" + this.txtSearchBox.Text + "%"; } else return; } </code></pre> <p>And the code for fetching the data:</p> <pre><code> cmd.AddParameter("searchExpression", searchExpression); cmd.AddParameter("sortExpression", sortColumn); cmd.AddParameter("startRowIndex", startRowIndex); cmd.AddParameter("maximumRows", maximumRows); DataSet ds = new DataSet(); SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(ds); DataTable dt = ds.Tables[0]; int i = dt.Rows.Count; return ds.Tables[0]; </code></pre> <p>When I check i in debug the value is 0. My question is why the gridview is not showing the EmptyDataTemplate and why it is still showing multiple page numbers when there are no rows.</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USBill the Lizard
    1. USryanthescot
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    2. PO
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    1. VO
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      1. POHow to handle empty return from database with gridview?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. POHow to handle empty return from database with gridview?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COcan you show us the method you use to bind the data to the gridview?
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      1. POHow to handle empty return from database with gridview?
      1. USDavide Piras
    2. COIn addition to Davide's comment, have you executed the procedure and determined that there is, indeed, nothing being returned?
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      1. POHow to handle empty return from database with gridview?
      1. USChuck
    3. COyes, i've got a count on the rows being returned and it's 0. also i've just ran it in debug and checked the grid's page count property and it's set to 0 like I would expect it to be. i'll edit the question to show the bind.
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      1. POHow to handle empty return from database with gridview?
      1. USryanthescot
 

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