Object reference not set to an instance of an object.

[marygladys]

I have done the following program in vb and Iam getting Object reference not set to an instance of an object as error.

so plz give me the solution

[dip_developer]

Iam getting Object reference not set to an instance of an object as error and plz give solution

where are u getting the error?? post the code snippet.....

[marygladys]

where are u getting the error?? post the code snippet.....

Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Save.Click
Dim r As DataRow
r = ds.Tables("mat1").NewRow
r.Item(0) = Val(t1.Text)
r.Item(1) = t2.Text
r.Item(2) = Val(t3.Text)
r.Item(3) = Val(t4.Text)
ds.Tables("mat1").Rows.Add(r)
da.Update(ds, "mat1")
n = 0
Call filldata(n)
End Sub



Iam getting error in the line

r = ds.Tables("mat1").NewRow

[dip_developer]

Private Sub Save_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Save.Click
Dim r As DataRow
r = ds.Tables("mat1").NewRow
r.Item(0) = Val(t1.Text)
r.Item(1) = t2.Text
r.Item(2) = Val(t3.Text)
r.Item(3) = Val(t4.Text)
ds.Tables("mat1").Rows.Add(r)
da.Update(ds, "mat1")
n = 0
Call filldata(n)
End Sub



Iam getting error in the line

r = ds.Tables("mat1").NewRow

just write
Dim r As New DataRow

[kenobewan]

Have you tried

r = ds.Tables(0).NewRow

and

r = ds.Tables(0).Rows.Add(r)

?