Hi Alan,

I think this can help you in understanding the scenario's

1) we have Created a "ig:WebDataGrid" with EnableDataViewState="true", EnableViewState="true"
this grid has check box on every row to select the row data
a) once row is checked and on click of a button(ADD From 1st Grid to 2nd Grid) we are displaying the selected row in the second grid which is mentioned below,
here we are storing the id/data of the row in viewstate
example : columns name -> id, first name, last name
data unique id, Anto , Thomson
date unique id, Gaurav, Ladani

2) we have Created another WebDataGrid with EnableDataViewState="true", EnableViewState="true", EnableAjaxViewState="true
the selected row in the above grid is displayed here.

3) we have created "Add window"
example : this window contains to add data i.e., first name, and last name
and buttons like clear/Reset - to clear all fields (to reset textbox to empty string, drop down to first index, datetime field to date.now)
cancel - "Add window" panel is hidden and displays the 1st grid and second grid.
save - to save data to DB, and hide the "Add window" panel by displaying newly added data in the 1st grid.

Note both the grids are in asp panel

Scenario's
1)

a --> without selecting any data in first grid, tried to Add data in first grid, by going to Add Window --> clicked "cancel"
b --> displays only first grid, since we have not added any data from 1st to 2nd grid
result : we don't have any issue

2)

a --> selected first data row i.e., Anto thomson now we are storing id in view state and displayed in 2nd grid
b --> Now tried to Add data in first grid, by going to Add Window --> clicked "cancel"
Expected result :
c --> displays both first and second gird data since we have added data to 2nd grid even going to "add window"
Actual result : we are getting view state exception. (Sys.WebForms.PageRequestManagerServerErrorException: Infragistics.Web.UI.GridControls.ColumnResizeSettings ViewState is corrupted.)

Note : we are facing this issue only after upgrading from 16.1 to 18.1 dlls

Gaurav,

Thank you for the additional information.  I have read through this and it isn't enough to determine what may be happening or even how to go about setting up a sample to attempt to reproduce the issue.  For example, it isn't clear if all three grids are created in markup or what events are used for the various actions.  Please provide a sample that demonstrates the approach you are using that we can reference while looking into this.

Let me know if you have any questions with this matter.