Export ERROR!

[Mike]

In the RadGrid_itemDataBound event I add an image and CssClass to a column depending on the dataItem returned.   

However, when I export to Excel, Word, or PDF it throws an error (listed below). 

How can I show an image and css in my grid and allow it to export without blowing up on the image or cssClass?

Grid Code Behind in ItemDataBound

message.Text = Convert.ToString(dataItem["ERROR_MESSAGE"].Text);
imageMessage.Text = Convert.ToString(dataItem["ERROR_MESSAGE"].Text);
imageResults.Visible = true;
message.ManualClose = true;
refreshStatus.CssClass = "colorRed";
imageResults.ImageUrl = "~/images/ResultError.gif";

Export Code

protected void ButtonExcel_Click(object sender, System.EventArgs e)
    {
        ConfigureExport();
        RadGrid Grid1 = (RadGrid)Page.Master.FindControl("Main").FindControl("RadGrid1");
        Grid1.MasterTableView.ExportToExcel();
    }
public void ConfigureExport()
    {
        RadGrid Grid1 = (RadGrid)Page.Master.FindControl("Main").FindControl("RadGrid1");
        Grid1.ExportSettings.ExportOnlyData = true;
        Grid1.ExportSettings.IgnorePaging = true;
        Grid1.ExportSettings.OpenInNewWindow = true;
    }

Error!!!

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 134: if (!IsPostBack) Line 135: message.Text = Convert.ToString(dataItem["ERROR_MESSAGE"].Text); Line 136: imageMessage.Text = Convert.ToString(dataItem["ERROR_MESSAGE"].Text);Line 137: imageResults.Visible = true; Line 138: message.ManualClose = true;

[Daniel]

Hello Mike,

I suggest you put a breakpoint on the following line:

imageMessage.Text = Convert.ToString(dataItem["ERROR_MESSAGE"].Text);

Check whether the imageMessage and dataItem does exist on this point. It would be helpful if you share the code depicted in the error message and provide the full stack trace.

Let us know whether this helps.

Best regards,
Daniel
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Mike]

I did put in the breakpoint and the dataitem does exists.  I think it is more of a problem that the parser or exporter does not know what to do with the tags.

[johnv]

I realize this thread is sort of stale, but I have seen something similar to this before with one of my co-workers. I am not sure this will help but it did the trick with my friend. Try placing in the following code at the very top of your item data bound event:

if (e.Item.ItemType != ListItemType.AlternatingItem && e.Item.ItemType != ListItemType.Item) { return; }

Since the Item Data Bound event does not have any data in the header, footer, pager, separator, or the like, you may just be falling into that old "I have no data so my data object is null" trap.

I hope this helps,

John