frmclass.vb

“代码”目录下的程序

        Me.Label7.TabIndex = 22
        Me.Label7.Text = "班主任"
        '
        'txbNumber
        '
        Me.txbNumber.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.DataSet11, "班级信息.人数"))
        Me.txbNumber.Location = New System.Drawing.Point(204, 29)
        Me.txbNumber.Name = "txbNumber"
        Me.txbNumber.Size = New System.Drawing.Size(80, 21)
        Me.txbNumber.TabIndex = 21
        Me.txbNumber.Text = ""
        '
        'Label6
        '
        Me.Label6.Location = New System.Drawing.Point(204, 13)
        Me.Label6.Name = "Label6"
        Me.Label6.Size = New System.Drawing.Size(56, 16)
        Me.Label6.TabIndex = 20
        Me.Label6.Text = "人数"
        '
        'txbGrade
        '
        Me.txbGrade.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.DataSet11, "班级信息.年级"))
        Me.txbGrade.Location = New System.Drawing.Point(108, 29)
        Me.txbGrade.Name = "txbGrade"
        Me.txbGrade.Size = New System.Drawing.Size(80, 21)
        Me.txbGrade.TabIndex = 19
        Me.txbGrade.Text = ""
        '
        'Label5
        '
        Me.Label5.Location = New System.Drawing.Point(108, 13)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(56, 16)
        Me.Label5.TabIndex = 18
        Me.Label5.Text = "年级"
        '
        'txbClassId
        '
        Me.txbClassId.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.DataSet11, "班级信息.班级编号"))
        Me.txbClassId.Location = New System.Drawing.Point(12, 29)
        Me.txbClassId.Name = "txbClassId"
        Me.txbClassId.Size = New System.Drawing.Size(80, 21)
        Me.txbClassId.TabIndex = 17
        Me.txbClassId.Text = ""
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(12, 13)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(56, 16)
        Me.Label4.TabIndex = 16
        Me.Label4.Text = "班级编号"
        '
        'frmClass
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(584, 229)
        Me.Controls.Add(Me.GroupBox1)
        Me.Name = "frmClass"
        Me.Controls.SetChildIndex(Me.GroupBox1, 0)
        CType(Me.DataSet11, System.ComponentModel.ISupportInitialize).EndInit()
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)

    End Sub

#End Region
    Public Overrides Sub Prepare()
        Me.Text = "班级信息维护"
    End Sub
    Public Overrides Sub LoadData()
        Dim strFilter As String
        If txbOne.Text.Trim.Length = 0 Then
            If txbTwo.Text.Trim.Length = 0 Then
                If txbThree.Text.Trim.Length = 0 Then
                    strFilter = ""
                Else
                    strFilter = "where 班级名称 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            Else
                strFilter = "where 年级 like '"
                strFilter += txbTwo.Text.Trim + "%'"
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 班级名称 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            End If
        Else
            strFilter = "where 班级编号 like '"
            strFilter += txbOne.Text.Trim + "%'"
            If txbTwo.Text.Trim.Length <> 0 Then
                strFilter += " and 年级 like '"
                strFilter += txbTwo.Text.Trim + "%'"
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 班级名称 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            Else
                If txbThree.Text.Trim.Length <> 0 Then
                    strFilter += " and 班级名称 like '"
                    strFilter += txbThree.Text.Trim + "%'"
                End If
            End If
        End If
        '清空DataSet11
        DataSet11.Clear()
        SqlConnection1.ConnectionString = DataBase.sConn
        Dim strSQL As String
        SqlDataAdapter1.SelectCommand.CommandText _
        = "select * from 班级信息 " + strFilter
        '根据查询条件重新填充DataSet11
        SqlDataAdapter1.Fill(DataSet11)
        dtData = DataSet11.Tables("班级信息")
        bmData = Me.BindingContext(DataSet11, "班级信息")
        If bmData.Count <> 0 Then
            bmData.Position = 0
        End If
    End Sub
    Public Overrides Sub SetDataGrid()
        LoadData()
        '定义一个DataGrid表样式
        Dim ts As New DataGridTableStyle
        Dim aColumnTextColumn As DataGridTextBoxColumn
        Dim numCols As Integer = dtData.Columns.Count
        Dim i As Integer
        For i = 0 To numCols - 1
            aColumnTextColumn = New DataGridTextBoxColumn
            aColumnTextColumn.MappingName = _
            dtData.Columns(i).ColumnName
            aColumnTextColumn.HeaderText = _
            dtData.Columns(i).ColumnName
            aColumnTextColumn.NullText = ""
            aColumnTextColumn.ReadOnly = True
            ts.GridColumnStyles.Add(aColumnTextColumn)
        Next
        ts.AlternatingBackColor = Color.LightGray
        ts.AllowSorting = False
        ts.MappingName = dtData.TableName
        dgdList.TableStyles.Clear()
        dgdList.TableStyles.Add(ts)
        Dim dv As DataView = dtData.DefaultView
        dv.AllowNew = False
        dv.AllowDelete = False
        'dv.AllowEdit = False
        '设置数据源
        dgdList.DataSource = dtData.DefaultView
        bmData = Me.BindingContext(DataSet11, "班级信息")
        lblCount.Text = "记录数:" + dtData.Rows.Count.ToString()
    End Sub
    Public Overrides Sub SetTextBoxState(ByVal bState As Boolean)
        Me.GroupBox1.Enabled = Not bState
    End Sub
    Public Overrides Sub Clear()
        Me.txbClassId.Text = ""
        Me.txbGrade.Text = ""
        Me.txbNumber.Text = ""
        Me.txbTeacher.Text = ""
        Me.txbName.Text = ""
        Me.txbShortName.Text = ""
    End Sub
    Public Overrides Sub SaveForAdd()
        Dim dr As DataRow = DataSet11.Tables("班级信息").NewRow()
        Try
            dr("班级编号") = Me.txbClassId.Text.Trim
            dr("年级") = Me.txbGrade.Text.Trim
            dr("班级名称") = Me.txbName.Text.Trim
            dr("班级简称") = Me.txbShortName.Text.Trim
            dr("人数") = Me.txbNumber.Text.Trim
            dr("班主任") = Me.txbTeacher.Text.Trim
        Catch ex As Exception
            MessageBox.Show("数据格式不正确！")
            Exit Sub
        End Try
        Try
            DataSet11.Tables("班级信息").Rows.Add(dr)
            If Me.DataSet11.HasChanges = True Then
                SqlDataAdapter1.Update(DataSet11)
            End If
        Catch ex As Exception
            MessageBox.Show("数据添加失败!")
        End Try
        LoadData()
        dgdList.DataSource = dtData.DefaultView
    End Sub

    Public Overrides Sub DeleteData()
        Try
            '删除当前行的数据
            DataSet11.Tables("班级信息"). _
            Rows(bmData.Position).Delete()
            If Me.DataSet11.HasChanges = True Then
                '更新DataSet11
                SqlDataAdapter1.Update(DataSet11)
            End If
        Catch ex As Exception
            MessageBox.Show("数据删除失败!")
        End Try
    End Sub

    Public Overrides Sub SaveForUpdate()
        Try
            Dim row As Integer
            row = dgdList.CurrentCell.RowNumber
            dgdList.CurrentCell = _
            New DataGridCell((row + 1) Mod bmData.Count, 0)
            '判断是否有更新的数据
            If Me.DataSet11.HasChanges = True Then
                SqlDataAdapter1.Update(DataSet11)
            End If
        Catch ex As Exception
            MessageBox.Show("数据修改失败!")
        End Try
    End Sub
End Class