Forum Discussion
asp.net loop checkboxes in gridview with DocumentFormat.OpenXml.Wordprocessing
it is ok to run this code to loop checked rows dim abc as checkbox = row.cells(1).findcontrol("Cb") but once add import DocumentFormat.OpenXml.Wordprocessing findcontrol failed function findco...
It looks like you're trying to find a System.Web.UI.WebControls.CheckBox within a cell, but importing the DocumentFormat.OpenXml.Wordprocessing namespace makes the CheckBox class ambiguous (there is a CheckBox class in both System.Web.UI.WebControls and DocumentFormat.OpenXml.Wordprocessing).
To get the checkbox from the cell, try using the fully qualifyed namespace. Also, I'd recommend a ctype and a null/nothing check:
dim abc as System.Web.UI.WebControls.CheckBox = CType(row.cells(1).findcontrol("Cb"), System.Web.UI.WebControls.CheckBox)
If abc IsNot Nothing Then
'do something here...
End If