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CheckBox in DataGrid is not responding to OnCheckChanged

daforga asked
Last Modified: 2013-12-17
In my current project there is a Gridview Control with a CheckBox Column.  I want to run a javascript routine whenever a user checks one of the boxes contained on the grid.  To accomplish this I have added an Attribute to the checkbox in the RowDataBound function associated with the Gridview (this is copied to the Code section of this question).  As a preliminary I have programmed the Javascript to simply show an alert with some info from the gridview.  This pattern is very similar to one I frequently use with Buttons contained in a column of a gridview, but I am getting no reaction at all from the code listed here.  Can anyone help me with this?

In RowDataBound:
CheckBox cbPrimary = (CheckBox)e.Row.FindControl("cbPrimaryContact");
if (cbPrimary != null) 
string checkHandler = string.Format("checkPrimary('{0}');", e.Row.Cells[1].ToString());
cbPrimary.Attributes.Add("OnCheckedChanged", checkHandler); 
   function checkPrimary(varValue)

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