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Failed to convert parameter value from a ListItem to a Byte[]

Failed to convert parameter value from a ListItem to a Byte[] error in inserting values to database by using of stored procedure .

I was faced this problem and  it was fixed by changing of the DropdownList.SelectedItem to ddlCategoryType.SelectedItem.Text  .

Remember That always use the  ddlCategoryType.SelectedItem.Text   property to get text instead of ddlCategoryType.SelectedItem


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