I created aboutcodes data base having reportcard
table as show below
created GridView as show below
Here DataKeyNames name is idnumber
Problem 1:
Forget to add DataKeyNames name in GridView
GridView must contain DataKeyNames name
Problem 2:
Different DataKeyNames name
DataField name Must be one of column name of
datbase table
Problem 3:
Forget to add DataKeyNames column in Gridview column
DataKeyNames name column must be present in GridView column
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