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vb.net我如何以編程方式從datagridview向sql數據庫添加新行(和更新)

[英]vb.net how do i add a new rows (and update) from datagridview programmatically to sql database

問一個關於我以前的問題的新問題。

就是這樣,到目前為止,我能夠使以下代碼正常工作(感謝@JADE幫助我,(很多):)

Dim connstr As String = "server=midtelephone\sqlexpress; database=testdb; user= sa; password=sa;"

    cmdconn = New SqlConnection
    cmd = New SqlCommand        
    cmdconn.ConnectionString = connstr 
    cmd.Connection = cmdconn
    cmdconn.Open()

    Dim period, VOUCH_AMT, INDIVIDUAL_AMT, check_no, D_MAILED, DIR_NO As String
    For i As Integer = 0 To Me.DataGridView1.Rows.Count - 1


        With Me.DataGridView1.Rows(i)

            If IsDBNull(.Cells(0).Value()) OrElse .Cells(0).Value() Is Nothing OrElse .Cells(0).Value().ToString().Trim() = "" Then
                period = ""
            Else
                period = .Cells(0).Value()
            End If
            If IsDBNull(.Cells(1).Value()) OrElse .Cells(1).Value() Is Nothing OrElse .Cells(1).Value().ToString().Trim() = "" Then
                VOUCH_AMT = "0"
            Else
                VOUCH_AMT = .Cells(1).Value()
            End If
            If IsDBNull(.Cells(2).Value()) OrElse .Cells(2).Value() Is Nothing OrElse .Cells(2).Value().ToString().Trim() = "" Then
                INDIVIDUAL_AMT = "0"
            Else
                INDIVIDUAL_AMT = .Cells(2).Value()
            End If
            If IsDBNull(.Cells(3).Value()) OrElse .Cells(3).Value() Is Nothing OrElse .Cells(3).Value().ToString().Trim() = "" Then
                check_no = ""
            Else
                check_no = .Cells(3).Value()
            End If
            If IsDBNull(.Cells(4).Value()) OrElse .Cells(4).Value() Is Nothing OrElse .Cells(4).Value().ToString().Trim() = "" Then
                D_MAILED = ""
            Else
                D_MAILED = .Cells(4).Value()
            End If
            If IsDBNull(.Cells(5).Value()) OrElse .Cells(5).Value() Is Nothing OrElse .Cells(5).Value().ToString().Trim() = "" Then
                DIR_NO = ""
            Else
                DIR_NO = .Cells(5).Value()
            End If


        End With

        cmd.CommandText = "insert into tobee.EBD_BILLHISTORY(period, vouch_amt, individual_amt, check_no, d_mailed, dir_no)values" & _
            "('" & period.Replace("'", "''") & "'," & VOUCH_AMT & "," & INDIVIDUAL_AMT & ",'" & check_no.Replace("'", "''") & "','" & D_MAILED.Replace("'", "''") & "', '" & DIR_NO.Replace("'", "''") & "')"
        cmd.ExecuteNonQuery()
        MsgBox("Saved")
    Next
    cmdconn.Close()

End Sub

現在的問題是,如果我想以編程方式添加新行(我已經將dgv設置為以編程方式進行編輯)。 度量標准或下一步程序是什么? 我有一個編輯按鈕,可以編輯datagridview,如下所示:

Private Sub btnEditmain_Click(sender As Object, e As EventArgs) Handles btnEditmain.Click

    DataGridView1.AllowUserToAddRows = True
    DataGridView1.BeginEdit(True)
    btnSave.Enabled = True

End Sub

(同樣,當我檢查數據庫中的表時,似乎單擊“保存”按鈕后沒有進行任何更改)。 幫我。 提前致謝。 :)

您是否嘗試將DataGridView更改為ListView並啟用對ListView的編輯? 如果分別指定了命令,則插入,編輯和刪除按鈕將出現在ListView上。

我也想這樣做,但是經過長時間的研究,這是最好的。 加載表代碼,然后在編輯DataGridView后添加一個按鈕。

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Me.TableAdapter.Fill(Me.DataSet.YourTable)
    Me.TableAdapter.Fill(Me.DataSet.YourTable)
    DataGridView1.[ReadOnly] = False
    adap.Fill(dt)
    BindingSource.DataSource = dt
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    Try
        adap.Update(dt)
        ' adap.UpdateCommand(dt)
        ' MessageBox.Show("Saved successfully")
    Catch ex As Exception
        '  MessageBox.Show("Error updating database")
    End Try

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