The parameterized query expects the parameter which was not supplied

Question

I\'m having a problem with my code:

Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged         


        

Answer 1

If you pass null value to parameter,you will get this error even after you add the parameter so try to check the value and if it null then use DBNull.Value

This will work

cmd.Parameters.Add("@Department", SqlDbType.VarChar)

If (TextBox2.Text = Nothing) Then
    cmd.Parameters("@Department").Value = DBNull.Value
Else
    cmd.Parameters("@Department").Value = TextBox2.Text
End If

This will convert the null values from the object layer to DBNull values that are acceptable to the database.