使用编辑和更新编辑和更新我的SQL Server数据库

Question

我有一个包含5列的SQL Server表。 col1是主键。我在ASP.net 4.0工作。

我希望能够分别编辑和更新我的SQL Server表。

我对更新有点麻烦。这是我的代码：

<asp:GridView ID="GridView1" runat="server" AutoPostBack="True" AutoGenerateColumns="True" AutoGenerateEditButton="True"  OnRowEditing="Gridview1_OnRowEditing" OnRowUpdating="GridView1_OnRowUpdating">
</asp:GridView>

代码：

Sub ShowGrid()
    Dim connStr, cmdStr As String
    connStr = "connection string works"
    cmdStr = "SELECT * FROM table1;"
    Dim MyDataSet As New DataSet
    Dim MyDataTable As New DataTable()
    Try
        Using conn As New SqlConnection(connStr)
            Using cmd As New SqlCommand(cmdStr, conn)
                conn.Open()
                cmd.ExecuteNonQuery()
                Using MyDataAdaptor As New SqlDataAdapter(cmd)
                    MyDataAdaptor.Fill(MyDataSet)
                    MyDataTable = MyDataSet.Tables(0)
                    GridView1.EditIndex = Convert.ToInt32(ViewState("edit"))
                    GridView1.DataSource = MyDataTable
                    GridView1.DataBind()
                End Using
                conn.Close()
                cmd.Dispose()
                conn.Dispose()
            End Using
        End Using
    Catch ex As Exception
        Throw ex
    End Try
End Sub
Protected Sub GridView1_OnRowEditing(ByVal sender As Object, ByVal e As GridViewEditEventArgs)
    GridView1.EditIndex = e.NewEditIndex
    ViewState("edit") = GridView1.EditIndex
    ShowGrid()
End Sub
Protected Sub GridView1_OnRowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
    Dim connStr, cmdStr As String
    connStr = "connection string works"
    cmdStr = "UPDATE table1 SET (col2=@col2,col3=@col3,col4=@col4,col5=@col5) WHERE col1=@col1;"
    Try
        Using conn As New SqlConnection(connStr)
            Using cmd As New SqlCommand(cmdStr, conn)
                conn.Open()
                cmd.Parameters.AddWithValue("@col1", GridView1.Rows(e.RowIndex).Cells(0).Text)
                cmd.Parameters.AddWithValue("@col2", GridView1.Rows(e.RowIndex).Cells(1).Text)
                cmd.Parameters.AddWithValue("@col3", GridView1.Rows(e.RowIndex).Cells(2).Text)
                cmd.Parameters.AddWithValue("@col4", GridView1.Rows(e.RowIndex).Cells(3).Text)
                cmd.Parameters.AddWithValue("@col5", GridView1.Rows(e.RowIndex).Cells(4).Text)

                cmd.ExecuteNonQuery()
                conn.Close()
                cmd.Dispose()
                conn.Dispose()
            End Using
        End Using
    Catch ex As Exception

    End Try
    ViewState("edit") = e.RowIndex
    ShowGrid()
End Sub