I have recently upgrade my solution from Infragistics 7.3 to 9.2 (9.2.20092.1003).

I use  the following code to save the grid layout to a database table:

MemoryStream XMLStore = new MemoryStream();

System.Text.

UTF8Encoding enc = new System.Text.UTF8Encoding();

this.dgQueryResult.DisplayLayout.SaveAsXml(XMLStore);

string strLayout = enc.GetString(XMLStore.GetBuffer());

And this code to read the string and apply it to the grid.

MemoryStream XMLStore = new MemoryStream();

System.Text.

UTF8Encoding enc = new System.Text.UTF8Encoding();

strLayout = dsTmp.Tables[

"QUERY_FILTER"].Rows[0]["QUERY_LAYOUT"].ToString();

if (strLayout.Length > 0)

{

XMLStore.Write(enc.GetBytes(strLayout), 0, strLayout.Length);

XMLStore.Position = 0;

this.dgQueryResult.DisplayLayout.LoadFromXml(XMLStore);

}

This worked fine in previous versions and will work now if I save the layout using v9.2.

However, if I attempt to load a layout in 9.2 that was saved with the code at 7.3, I get the following exception on the LoadFromXml line:

"Object reference not set to an instance of an object."
     at Infragistics.Win.UltraWinGrid.UltraGridLayout.LoadHelper(Stream stream, PropertyCategories propertyCategories, IFormatter formatter)\r\n
     at Infragistics.Win.UltraWinGrid.UltraGridLayout.LoadFromXml(Stream stream, PropertyCategories propertyCategories)\r\n
        at Infragistics.Win.UltraWinGrid.UltraGridLayout.LoadFromXml(Stream stream)\r\n

I've looked at the two strings and see a very large number of differences so it's difficult for me to determine what the issue might be.

I have attached a file containing the text from the layout for v7.3.

Can anyone suggest what I should look at to determine the cause of this problem?

Thanks,

Gerry