定期取款.vb

银行帐户管理系统

Public Class 定期取款
    Inherits System.Windows.Forms.Form
    Dim strconn As String = "data source=.;initial catalog=weboy;user id=sa;password=;"
    Dim objds As New Data.DataSet
    Dim objda As SqlClient.SqlDataAdapter
    Dim objdr As SqlClient.SqlDataReader
    Dim bingpage As BindingManagerBase
    Dim strsql As String
    Dim result As String
    Dim cn As New SqlClient.SqlConnection
    Dim cmd As SqlClient.SqlCommand
    Dim str, str1 As String
    Dim objcommand As SqlClient.SqlCommand
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Button2.Enabled = True
        result = MessageBox.Show("确定退出取款？", "系统提示", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation)
        If result = Windows.Forms.DialogResult.Yes Then
            Me.Close()
        End If
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If TextBox2.Text <> TextBox3.Text Then
            MsgBox("请确定两次输入的密码相同")
            Exit Sub
        End If
        Button2.Enabled = True
        result = MessageBox.Show("确定取款？", "系统提示", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation)
        If result = Windows.Forms.DialogResult.No Then
            Me.Close()
        Else
            If TextBox1.Text = "" Or TextBox2.Text = "" Or TextBox3.Text = "" Or TextBox5.Text = "" Then
                MsgBox("请确定输入完整信息!")
                Exit Sub
            Else
                strsql = "select ID from FConsumers "
                objcommand = New SqlClient.SqlCommand(strsql, New SqlClient.SqlConnection(strconn))
                objcommand.Connection.Open()
                objdr = objcommand.ExecuteReader(CommandBehavior.CloseConnection)
                With objdr
                    Do While .Read = True
                        str1 = .GetString(0)
                        If Trim(TextBox1.Text) <> Trim(str1) Then
                            MsgBox("该帐户不存在,请重新输入!")
                            TextBox1.Text = ""
                            TextBox2.Text = ""
                            TextBox3.Text = ""
                            TextBox5.Text = ""
                            TextBox1.Focus()
                            Exit Sub

                        Else
                            strsql = "select money from FConsumers where ID='" & Trim(TextBox1.Text) & "'and password='" & Trim(TextBox2.Text) & "'"
                            objda = New SqlClient.SqlDataAdapter(strsql, strconn)
                            objda.Fill(objds, "FConsumers")
                            bingpage = Me.BindingContext(objds, "FConsumers")
                            TextBox4.DataBindings.Add(New Binding("text", objds, "FConsumers.money"))
                            If (Val(TextBox5.Text) - Val(TextBox4.Text)) > 0 Then
                                MessageBox.Show("金额不足！" & vbCrLf & "当前余额为:" + TextBox4.Text + "元", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
                                TextBox4.Text = ""
                                Me.Close()
                                Exit Sub
                            ElseIf (Val(TextBox4.Text) - Val(TextBox5.Text)) > 0 Then
                                strsql = "update FConsumers set money='" & Trim(TextBox4.Text - TextBox5.Text) & "' where ID='" & Trim(TextBox1.Text) & "'and password='" & Trim(TextBox2.Text) & "'"
                                cn.ConnectionString = strconn
                                cn.Open()
                                cmd = New SqlClient.SqlCommand(strsql, cn)
                                cmd.ExecuteNonQuery()
                                cmd.Dispose()
                                cn.Dispose()
                                MessageBox.Show("取款成功！" & vbCrLf & "剩余金额为:" & Trim(TextBox4.Text - TextBox5.Text) & "元", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information)
                                Me.Close()
                                Exit Sub
                            End If
                        End If
                    Loop
                End With

            End If
        End If

    End Sub
End Class