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POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
 

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  1. POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
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    <p>Here is the code for the button click event;</p> <pre><code> Protected Sub CompetenciesButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CompetenciesButton.Click Dim con As String = WebConfigurationManager.ConnectionStrings("foo").ToString() Dim selectedrow As String = Competencies.SelectedValue.ToString Dim s As String = "SELECT * from foo WHERE (" &amp; selectedrow &amp; " =1)" Dim DataAdapter As New SqlDataAdapter(s, con) Dim Result As New DataTable If Not IsNothing(DataAdapter) Then DataAdapter.Fill(Result) DataAdapter.Dispose() End If GV.DataSource = Result GV.DataBind() GV2.DataSource = Result GV2.DataBind() End Sub </code></pre> <p>Here is the stack:</p> <pre><code>[NullReferenceException: Object reference not set to an instance of an object.] administration_Search.CompetenciesButton_Click(Object sender, EventArgs e) +28 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746 </code></pre> <p>Everything works fine offline in VS2008 but I get this error after publishing.</p> <p>Thanks.</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMarkJ
    1. USPhil
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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
    1. VO
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      1. POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COwhich line is line 28 exactly?
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      1. POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
      1. USPbirkoff
    2. COthat is the DataAdapter.Dispose() line, thanks, phil
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      1. POWhy would this event handler code cause a Object reference not set to an instance of an object. Error (only present on live server, ok on dev)?
      1. USPhil
 

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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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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