Gridview1.datakeys[e.rowindex]. Value.tostring () index out of range

Gridview1.datakeys[e.rowindex]. Value.tostring () index out of range

Question: Gridview1.datakeys[e.rowindex]. Value.tostring () must be non-negative and less than the collection size.

Exception information: System.Web.HttpUnhandledException: Throws an exception of type "System.Web.HttpUnhandledException". ---> system.argumentoutofrangeexception: Index out of range. Must be non-negative and less than the collection size.

Error location: Gridview1.datakeys[e.rowindex]. Value.tostring ().

Workaround: Add the field name that is set as the primary key in the DataKeyNames entry of the GridView List property.
Steps:
1, the SQL table set the primary key field, such as Deptinid
2. Select GridView1 in the. aspx design interface and set DataKeyNames as the primary key field name in the property bar Deptinid