Devexpress Network - PerformCallback generates invalid view state

Question

I have a DevExpress grid that needs to be updated every time a value is changed in combobox. For example, I have a combo box that sets the size of the grid page. One of the requirements is that combobox does not cause a complete reverse gear.

The mapping is declared as follows:

<asp:DropDownList ID="cboPages" AutoPostBack="false" runat="server" EnableViewState="false" OnSelectedIndexChanged="cboPages_SelectedIndexChanged" /> 

In the selected index is modified, it sets a cookie whose value is the selected value. When the combobox value changes, the javascript function is called:

 function PerformCallbackOnGrid(grid) { try { grid.PerformCallback("refresh"); } catch(err){ alert('Could not perform callback on grid.'); } } 

The function is added to the code behind:

 this.cboPages.Attributes["onChange"] = "PerformCallbackOnGrid(" + this.GridClientID + ")"; 

After completing the following steps:

• The user resizes the grid page using combobox, so PerformCallback is called at least once.
• User presses F5 (update).
• The user again tries to resize the page.

an "Invalid view" error message appears.

I tried to set ViewStateMode to Disabled for the grid, also EnableViewState = "false".

Answer 1

It figured it yourself! Apparently, it was enough to establish

 EnableViewState="false" EnableRowsCache="false" 

to the grid.

The line cache was the cause of the error in the view.