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POhiding a column in a dynamic infragistics grid and updating header
 

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  1. POhiding a column in a dynamic infragistics grid and updating header
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    <p>I have a infragistics grid that gets data when a dropdown is changed 1- i want to hide the last column every time the grid is loaded with data 2- i also want to update header according to data</p> <p>problem I am trying </p> <pre><code> protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { EntityName.Text = DropDownList1.SelectedItem.Text; string entity = "t_" + DropDownList1.SelectedItem.Text; String strConnString = ConfigurationManager.ConnectionStrings["LiveLeaseConnectionString"].ConnectionString; SqlConnection con = new SqlConnection(strConnString); SqlCommand cmd = new SqlCommand("p_DataList_ByRegardingObject", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@RegardingObjectName", entity); SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); sqlDataAdapter.Fill(dt); this.EntityGrid.DataSource = dt; this.EntityGrid.Columns[6].Hidden = true; </code></pre> <p>its throwing null reference error and it doesnt seem to update column names each time it loads data.data is getting refreshed but not the column names. here is my aspx</p> <pre><code> &lt;asp:DropDownList ID="DropDownList1" AutoPostBack="true" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"&gt; &lt;asp:ListItem&gt;Select Entity&lt;/asp:ListItem&gt; &lt;/asp:DropDownList&gt; &lt;asp:Label runat="server" ID="EntityName"&gt;&lt;/asp:Label&gt; &lt;ig:WebScriptManager ID="WebScriptManager1" runat="server"&gt;&lt;/ig:WebScriptManager&gt; &lt;ig:WebDataGrid ID="EntityGrid" runat="server" Width="100%" Height="50%" StyleSetName="Claymation" &gt; &lt;Behaviors&gt; &lt;ig:Sorting&gt; &lt;/ig:Sorting&gt; &lt;/Behaviors&gt; &lt;ClientEvents Click="NavigateOnClick" /&gt; &lt;/ig:WebDataGrid&gt; </code></pre>
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    1. USuser2167089
    1. USuser2167089
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    1. COCan you tell me on which line throws the exception?
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      1. USSteve
    2. COsteve at this.entitygrid.columns[6].hidden=true; it throws the exception
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      1. POhiding a column in a dynamic infragistics grid and updating header
      1. USuser2167089
    3. COthe updating header is done by clearing columns. but for the hiding part i know the column is url for all entities but it may not be in the same column all the time is there away to hide it using this text?
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      1. POhiding a column in a dynamic infragistics grid and updating header
      1. USuser2167089
 

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