Save all datagridview rows to table

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What is wrong with this code. I am trying to loop through all datagridview rows and save all rows to table.

VB

Dim con As New SqlConnection
        Dim cmd As New SqlCommand
        Dim val1 = TextBox1.Text
        Dim val2 = TextBox2.Text
        con.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True"
        con.Open()
        cmd.Connection = con

        For i As Integer = 0 To Me.DataGridView1.Rows.Count - 1
            cmd.CommandText = "Insert into table2(aa,bb) Values(@firstname,@lastname)"
            cmd.Parameters.AddWithValue("@firstname", DataGridView1.Rows(i).Cells(0).Value)
            cmd.Parameters.AddWithValue("@lastname", DataGridView1.Rows(i).Cells(1).Value)
            cmd.ExecuteNonQuery()
        Next

Posted 28-Apr-12 2:54am

wiswalld

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Mantu Singh · Answer 1 · 2012-04-28T04:33:00

Solution 1

try this code it will work for you I guess

VB

Dim con As New SqlConnection
        
        Dim val1 = TextBox1.Text
        Dim val2 = TextBox2.Text
        con.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True"
        con.Open()
        

        For i As Integer = 0 To Me.DataGridView1.Rows.Count - 1
          Dim cmd As New SqlCommand()
cmd.Connection = con
            cmd.CommandText = "Insert into table2(aa,bb) Values(@firstname,@lastname)"
            cmd.Parameters.AddWithValue("@firstname", DataGridView1.Rows(i).Cells(0).Value)
            cmd.Parameters.AddWithValue("@lastname", DataGridView1.Rows(i).Cells(1).Value)
            cmd.ExecuteNonQuery()
        Next

Hope this helps....

Best of Luck.............

Posted 28-Apr-12 4:33am

Mantu Singh

Comments

wiswalld 28-Apr-12 10:39am

I get the error

The variable name '@firstname' has already been declared. Variable names must be unique within a query batch or stored procedure.

wiswalld 28-Apr-12 10:48am

Sorry the error is

The parameterized query '(@firstname nvarchar(4000),@lastname nvarchar(4000))Insert into ' expects the parameter '@firstname', which was not supplied.

Mantu Singh 28-Apr-12 10:55am

Is you data grid empty....?
if not you are passing null value to parameter
I noted a line above in u r ques

try this

cmd.CommandText = "Insert into table2(aa,bb) Values(@firstname,@lastname)"
cmd.Parameters.AddWithValue("@firstname",val1)
cmd.Parameters.AddWithValue("@lastname",val2)

wiswalld 28-Apr-12 13:50pm

There are values

I use this to populate a datagridview from an excel sheet
Dim MyConnection As System.Data.OleDb.OleDbConnection
Dim DtSet As System.Data.DataSet
Dim MyCommand As System.Data.OleDb.OleDbDataAdapter
MyConnection = New System.Data.OleDb.OleDbConnection("provider=Microsoft.Jet.OLEDB.4.0;Data Source='c:\Temp\Sex.xls';Extended Properties=Excel 8.0;")
MyCommand = New System.Data.OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection)
MyCommand.TableMappings.Add("Table", "Net-informations.com")
DtSet = New System.Data.DataSet
MyCommand.Fill(DtSet)
DataGridView1.DataSource = DtSet.Tables(0)
MyConnection.Close()

Then I am trying to save to sql table using

Dim con As New SqlConnection
con.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True"
con.Open()

For i As Integer = 0 To Me.DataGridView1.Rows.Count - 1
Dim cmd As New SqlCommand()
cmd.Connection = con
cmd.CommandText = "Insert into table2(aa,bb) Values(@firstname,@lastname)"
cmd.Parameters.AddWithValue("@firstname", DataGridView1.Rows(i).Cells(0).Value)
cmd.Parameters.AddWithValue("@lastname", DataGridView1.Rows(i).Cells(1).Value)
cmd.ExecuteNonQuery()
Next

[no name] 2-Jun-15 1:11am

Are you using a local database?