VB: How to bind a DataTable to a DataGridView? - vb.net

Question

I know this is a basic question that has already been answered thousand times, but I can't make it work.
I am working in Visual Studio 2010 and have two forms in my Windows Application. In the first one (Main.vb), the user enters his inputs and the calculation takes place. In the second one (DataAnalysis.vb) the calculation results are displayed.
In Main.vb, I create the temp table that will contains all the intermediary calculation steps:
Dim tableTempJDL As DataTable = New DataTable("TempJDL")
Dim column As DataColumn
column = New DataColumn("ID", GetType(System.Int32))
tableTempJDL.Columns.Add(column)
column = New DataColumn("PthObjekt", GetType(System.Double))
tableTempJDL.Columns.Add(column)
'further columns are after created using the same method
Then, in DataAnalysis.vb, I try to display the DataTable tableTempJDL into the DataGridViewBerechnung:
Public bindingSourceBerechnung As New BindingSource()
Me.DataGridViewBerechnung.DataSource = Me.bindingSourceBerechnung
But then I don't understand how to fill the DataGridView...

Answer 1

Simply, you can make your table as the datasource of bindingsource in following way:
Me.bindingSourceBerechnung .DataSource = tableTempJDL
Later on, you can bind above binding source in your datagridview in following way:
Me.DataGridViewBerechnung.DataSource = Me.bindingSourceBerechnung

Answer 2

Public Class Form1
Dim CON As New SqlConnection
Dim CMD As New SqlCommand
Dim dt As New DataTable
Public Sub DbConnect()
If CON.State = ConnectionState.Open Then DbClose()
CON.ConnectionString = "Data Source = yourservername;Initial Catalog=your database name;Integrated Security=True"
CON.Open()
End Sub
Public Sub DbClose()
CON.Close()
CON.Dispose()
End Sub
Public Sub enabletext()
TextBox1.Enabled = True
End Sub
Public Sub CLEARFEILDS()
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
ComboBox1.DataSource = Nothing
ComboBox1.SelectedIndex = 0
DataGridView2.Rows.Clear()
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
ComboBox1.Select()
TextBox4.Enabled = False
DataGridView1.Visible = False
TextBox5.Visible = False
'AUTOSEACH()
DbConnect()
Dim SELECTQUERY As String = "SELECT PROD_CODE FROM TBLPRODUCT"
Dim MYCOMMAND As New SqlCommand(SELECTQUERY, CON)
Dim MYREADER As SqlClient.SqlDataReader
MYREADER = MYCOMMAND.ExecuteReader
Prod_Code.Items.Clear()
While MYREADER.Read
Prod_Code.Items.Add(MYREADER("PROD_CODE"))
End While
DbClose()
End Sub
Public Function InvCodeGen(ByVal CurrCode As String) As String
Dim RightSix As String = Microsoft.VisualBasic.Right(Trim(CurrCode), 3)
Dim AddValue As Integer = Microsoft.VisualBasic.Val(RightSix) + 1
Dim RetValue As String
If Microsoft.VisualBasic.Len(AddValue.ToString) = 1 Then
RetValue = "00" + AddValue.ToString
ElseIf (Microsoft.VisualBasic.Len(AddValue.ToString) = 2) Then
RetValue = "000" + AddValue.ToString
Else
RetValue = AddValue.ToString
End If
Return RetValue
End Function
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
CreateNewCode()
TextBox1.Enabled = False
DataGridView1.Visible = False
TextBox5.Visible = False
ComboBox1.Visible = True
AddCustomer()
'GridView2Load(GetDataGridView2())
End Sub
Private Sub CreateNewCode()
Dim CurrCode As String = ""
'Dim NewCode As String = "INV"
Dim NewCode As Integer
Dim mySelectQuery As String = "SELECT MAX(INV_NO) AS INVNO FROM TBLINV_HEADER"
Dim myCommand As New SqlClient.SqlCommand(mySelectQuery, CON)
myCommand.CommandType = CommandType.Text
Dim myReader As SqlClient.SqlDataReader
DbConnect()
myReader = myCommand.ExecuteReader()
Do While myReader.Read()
If IsDBNull(myReader("INVNO")) Then
myReader.Close()
Dim myNewYearQuery As String = "SELECT MAX(INV_NO) AS INVNO FROM TBLINV_HEADER"
Dim myNewYearCommand As New SqlClient.SqlCommand(myNewYearQuery, CON)
myNewYearCommand.CommandType = CommandType.Text
Dim myNewYearReader As SqlClient.SqlDataReader
myNewYearReader = myNewYearCommand.ExecuteReader()
Do While myNewYearReader.Read()
CurrCode = Trim(myNewYearReader("INVNO").ToString)
Loop
myNewYearReader.Close()
Exit Do
Else
CurrCode = Trim(myReader("INVNO").ToString)
myReader.Close()
Exit Do
End If
Loop
DbClose()
NewCode = Trim(InvCodeGen(CurrCode))
TextBox1.Text = CInt(NewCode)
End Sub
Private Sub AddCustomer()
Dim dsCusCode As New DataSet
dsCusCode.Reset()
ComboBox1.Items.Clear()
Dim myCusCodeQuery As String = "SELECT CUST_CODE as Custcode FROM TBLCUSTOMER"
Dim daCusCode As New SqlClient.SqlDataAdapter(myCusCodeQuery, CON)
DbConnect()
daCusCode.Fill(dsCusCode, "TBLCUSTOMER")
DbClose()
Dim x As Integer
For x = 0 To dsCusCode.Tables(0).Rows.Count - 1
ComboBox1.Items.Add(dsCusCode.Tables(0).Rows(x).Item("Custcode").ToString)
'TextBox3.Text = dsCusCode.Tables(0).Rows(x).Item("custname").ToString
Next
ComboBox1.SelectedIndex = -1
x = Nothing
myCusCodeQuery = Nothing
dsCusCode.Dispose()
daCusCode.Dispose()
dsCusCode = Nothing
dsCusCode = Nothing
End Sub
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
Dim Code As String
Code = ComboBox1.Text
Dim dsCode As New DataSet
dsCode.Reset()
Dim myCodeQuery As String = "SELECT cust_name as custname, cust_add1 as custadd FROM TBLCUSTOMER where Cust_Code = '" & Code & "'"
Dim daCode As New SqlClient.SqlDataAdapter(myCodeQuery, CON)
DbConnect()
daCode.Fill(dsCode, "TBLCUSTOMER")
DbClose()
TextBox2.Text = dsCode.Tables(0).Rows(0).Item("custname").ToString
TextBox3.Text = dsCode.Tables(0).Rows(0).Item("custadd").ToString
myCodeQuery = Nothing
dsCode.Dispose()
daCode.Dispose()
dsCode = Nothing
dsCode = Nothing
End Sub
Private Sub Button8_Click(sender As Object, e As EventArgs) Handles Button8.Click
For I As Integer = 0 To DataGridView2.Rows.Count - 1
Dim MYQUERY As String = "SELECT PROD_DESC , PROD_PRICE FROM TBLPRODUCT WHERE PROD_CODE='" & DataGridView2.Rows(I).Cells(1).Value & "'"
Dim MYCOMMAND As New SqlCommand(MYQUERY, CON)
DbConnect()
Dim MYREADER As SqlClient.SqlDataReader
MYREADER = MYCOMMAND.ExecuteReader
If MYREADER.Read() Then
DataGridView2.Rows(I).Cells(2).Value = MYREADER("PROD_DESC")
DataGridView2.Rows(I).Cells(3).Value = MYREADER("PROD_PRICE")
End If
DbClose()
Next
End Sub
Private Sub DataGridView2_CellFormatting(sender As Object, e As DataGridViewCellFormattingEventArgs) Handles DataGridView2.CellFormatting
DataGridView2.Rows(e.RowIndex).Cells(0).Value = CInt(e.RowIndex + 1)
End Sub
Private Sub DataGridView2_CellEndEdit(sender As Object, e As DataGridViewCellEventArgs) Handles DataGridView2.CellEndEdit
For I As Integer = 0 To DataGridView2.Rows.Count - 1
Dim QTY As Double = DataGridView2.Rows(I).Cells(4).Value
Dim PRICE As Double = DataGridView2.Rows(I).Cells(3).Value
Dim AMOUNT As Double = QTY * PRICE
DataGridView2.Rows(I).Cells(5).Value = AMOUNT
Next
' SUM OF AMOUNT TOTAL
Dim COLSUM As Decimal = 0
For Each ROW As DataGridViewRow In DataGridView2.Rows
If Not IsDBNull(ROW.Cells(5).Value) Then
COLSUM += ROW.Cells(5).Value
End If
Next
TextBox4.Text = COLSUM
End Sub
'SAVE
Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
If MsgBox("Are you sure want to save this record?", vbYesNo + vbQuestion) = vbYes Then
updateinvheader()
updategridvalue()
CLEARFEILDS()
End If
End Sub
Private Sub updateinvheader()
Dim insertquery1 As String = "insert into TBLINV_HEADER(inv_no,inv_date,inv_cust) values(#inv_no,#inv_date,#inv_cust)"
Dim command As New SqlCommand(insertquery1, CON)
command.Parameters.AddWithValue("#inv_no", TextBox1.Text)
command.Parameters.AddWithValue("#inv_date", DateTime.Now)
command.Parameters.AddWithValue("#inv_cust", ComboBox1.Text)
DbConnect()
command.ExecuteNonQuery()
DbClose()
End Sub
Private Sub updategridvalue()
Dim i As Integer
Dim insertquery2 As String = "insert into TBLINV_detail(inv_lno,inv_no,inv_prod,inv_qty,inv_Price) values(#inv_lno,#inv_no,#inv_prod,#inv_qty,#inv_Price)"
Dim command As New SqlCommand(insertquery2, CON)
For i = 0 To DataGridView2.RowCount - 1
If DataGridView2.Rows(i).Cells(1).Value = "" Then
GoTo 100
Else
command.Parameters.AddWithValue("#inv_lno", DataGridView2.Rows(i).Cells(0).RowIndex + 1)
'command.Parameters.AddWithValue("#inv_lno", DataGridView2.Rows(i).Cells(0).)
command.Parameters.AddWithValue("#inv_no", TextBox1.Text)
command.Parameters.AddWithValue("#inv_prod", DataGridView2.Rows(i).Cells(1).Value)
command.Parameters.AddWithValue("#inv_qty", DataGridView2.Rows(i).Cells(4).Value)
command.Parameters.AddWithValue("#inv_Price", DataGridView2.Rows(i).Cells(3).Value)
End If
DbConnect()
command.ExecuteNonQuery()
DbClose()
100: command.Parameters.Clear()
Next
MsgBox("data saved successfuly")
End Sub
Private Sub Button9_Click(sender As Object, e As EventArgs) Handles Button9.Click
DataGridView1.Visible = True
TextBox5.Visible = True
ComboBox1.Visible = False
DbConnect()
Dim MYQUERY As String = "Select * FROM TBLCUSTOMER" &
" INNER Join TBLINV_HEADER ON TBLINV_HEADER.INV_CUST = TBLCUSTOMER.CUST_CODE" &
" WHERE TBLINV_HEADER.INV_NO ='" & TextBox1.Text & "'"
Dim CMD As New SqlCommand(MYQUERY, CON)
Dim DA As New SqlDataAdapter
DA.SelectCommand = CMD
Dim DT As New DataTable
DA.Fill(DT)
If DT.Rows.Count > 0 Then
MsgBox(DT.Rows(0)(1).ToString())
'ComboBox1.Text = DT.Rows(0)(1).ToString()
ComboBox1.Visible = False
TextBox5.Text = DT.Rows(0)(1).ToString()
TextBox2.Text = DT.Rows(0)(2).ToString()
TextBox3.Text = DT.Rows(0)(3).ToString()
End If
DbClose()
DataGridView1.DataSource = GETPRODUCTDETAILS()
End Sub
Private Function GETPRODUCTDETAILS() As DataTable
Dim PRODUCTDET As New DataTable
DbConnect()
Dim MYQUERY As String = " SELECT TBLINV_DETAIL.INV_LNO, TBLINV_DETAIL.INV_PROD, TBLPRODUCT.PROD_DESC, TBLINV_DETAIL.INV_PRICE, TBLINV_DETAIL.INV_QTY, (TBLINV_DETAIL.INV_QTY*TBLINV_DETAIL.INV_PRICE) AS AMOUNT FROM TBLINV_DETAIL " &
" INNER JOIN TBLPRODUCT On TBLPRODUCT.PROD_CODE = TBLINV_DETAIL.INV_PROD " &
" WHERE TBLINV_DETAIL.INV_NO='" & TextBox1.Text & "'"
Dim CMD As New SqlCommand(MYQUERY, CON)
Dim READER As SqlDataReader = CMD.ExecuteReader()
PRODUCTDET.Load(READER)
DbClose()
Return PRODUCTDET
End Function
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
Dim DELETEQUERY As String = "DELETE FROM TBLINV_DETAIL WHERE TBLINV_DETAIL.INV_NO= '" & TextBox1.Text & "'"
Dim DELETEQUERY2 As String = "DELETE FROM TBLINV_HEADER WHERE TBLINV_HEADER.INV_NO= '" & TextBox1.Text & "'"
Dim CMD As New SqlCommand(DELETEQUERY, CON)
Dim CMD2 As New SqlCommand(DELETEQUERY2, CON)
DbConnect()
CMD.ExecuteNonQuery()
CMD2.ExecuteNonQuery()
DbClose()
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
ComboBox1.DataSource = Nothing
DataGridView1.DataSource = Nothing
MsgBox("DATA DELETED SUCCESSFULLY")
End Sub
End Class