VB.Net by API/System.Windows.Forms/ErrorProvider
ErrorProvider.GetError
<source lang="vbnet">
Imports System.Windows.Forms public class DeferredValidation
public Shared Sub Main Application.Run(New Form1) End Sub
End class
Public Class Form1
Private Sub TextBox1_Validating(ByVal sender As Object, ByVal e As System.ruponentModel.CancelEventArgs) Handles TextBox1.Validating, TextBox2.Validating, TextBox3.Validating If (TextBox1.Text.Length <> 0) And Not (TextBox1.Text Like "##") _ Then ErrorProvider1.SetError(TextBox1, TextBox1.Name & " must contain exactly two digits") Else ErrorProvider1.SetError(TextBox1, "") End If End Sub Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing e.Cancel = True If IsInvalidField(TextBox1) Then Exit Sub If IsInvalidField(TextBox3) Then Exit Sub e.Cancel = False End Sub Private Function IsInvalidField(ByVal ctl As Control) As Boolean If ErrorProvider1.GetError(ctl).Length = 0 Then Return False Else MessageBox.Show(ErrorProvider1.GetError(ctl)) ctl.Focus() Return True End If End Function
End Class <Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.IContainer "NOTE: The following procedure is required by the Windows Form Designer "It can be modified using the Windows Form Designer. "Do not modify it using the code editor. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.ruponents = New System.ruponentModel.Container Me.Label1 = New System.Windows.Forms.Label Me.TextBox1 = New System.Windows.Forms.TextBox Me.TextBox2 = New System.Windows.Forms.TextBox Me.Label2 = New System.Windows.Forms.Label Me.TextBox3 = New System.Windows.Forms.TextBox Me.Label3 = New System.Windows.Forms.Label Me.ErrorProvider1 = New System.Windows.Forms.ErrorProvider(Me.ruponents) CType(Me.ErrorProvider1, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "Label1 " Me.Label1.AutoSize = True Me.Label1.Location = New System.Drawing.Point(8, 8) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(56, 13) Me.Label1.TabIndex = 0 Me.Label1.Text = "Five Digits" " "TextBox1 " Me.TextBox1.Location = New System.Drawing.Point(72, 8) Me.TextBox1.Name = "TextBox1" Me.TextBox1.Size = New System.Drawing.Size(80, 20) Me.TextBox1.TabIndex = 1 " "TextBox2 " Me.TextBox2.Location = New System.Drawing.Point(72, 32) Me.TextBox2.Name = "TextBox2" Me.TextBox2.Size = New System.Drawing.Size(80, 20) Me.TextBox2.TabIndex = 3 " "Label2 " Me.Label2.AutoSize = True Me.Label2.Location = New System.Drawing.Point(8, 32) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(56, 13) Me.Label2.TabIndex = 2 Me.Label2.Text = "Five Digits" " "TextBox3 " Me.TextBox3.Location = New System.Drawing.Point(72, 56) Me.TextBox3.Name = "TextBox3" Me.TextBox3.Size = New System.Drawing.Size(80, 20) Me.TextBox3.TabIndex = 5 " "Label3 " Me.Label3.AutoSize = True Me.Label3.Location = New System.Drawing.Point(8, 56) Me.Label3.Name = "Label3" Me.Label3.Size = New System.Drawing.Size(56, 13) Me.Label3.TabIndex = 4 Me.Label3.Text = "Five Digits" " "ErrorProvider1 " Me.ErrorProvider1.ContainerControl = Me " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(210, 83) Me.Controls.Add(Me.TextBox3) Me.Controls.Add(Me.Label3) Me.Controls.Add(Me.TextBox2) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.TextBox1) Me.Controls.Add(Me.Label1) Me.Name = "Form1" Me.Text = "Deferred Validation" CType(Me.ErrorProvider1, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) Me.PerformLayout() End Sub Friend WithEvents Label1 As System.Windows.Forms.Label Friend WithEvents TextBox1 As System.Windows.Forms.TextBox Friend WithEvents TextBox2 As System.Windows.Forms.TextBox Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents TextBox3 As System.Windows.Forms.TextBox Friend WithEvents Label3 As System.Windows.Forms.Label Friend WithEvents ErrorProvider1 As System.Windows.Forms.ErrorProvider
End Class
</source>
ErrorProvider.SetError
<source lang="vbnet">
Imports System.Windows.Forms public class DeferredValidation
public Shared Sub Main Application.Run(New Form1) End Sub
End class
Public Class Form1
Private Sub TextBox1_Validating(ByVal sender As Object, ByVal e As System.ruponentModel.CancelEventArgs) Handles TextBox1.Validating, TextBox2.Validating, TextBox3.Validating If (TextBox1.Text.Length <> 0) And Not (TextBox1.Text Like "##") _ Then ErrorProvider1.SetError(TextBox1, TextBox1.Name & " must contain exactly two digits") Else ErrorProvider1.SetError(TextBox1, "") End If End Sub Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing e.Cancel = True If IsInvalidField(TextBox1) Then Exit Sub If IsInvalidField(TextBox3) Then Exit Sub e.Cancel = False End Sub Private Function IsInvalidField(ByVal ctl As Control) As Boolean If ErrorProvider1.GetError(ctl).Length = 0 Then Return False Else MessageBox.Show(ErrorProvider1.GetError(ctl)) ctl.Focus() Return True End If End Function
End Class <Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.IContainer "NOTE: The following procedure is required by the Windows Form Designer "It can be modified using the Windows Form Designer. "Do not modify it using the code editor. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.ruponents = New System.ruponentModel.Container Me.Label1 = New System.Windows.Forms.Label Me.TextBox1 = New System.Windows.Forms.TextBox Me.TextBox2 = New System.Windows.Forms.TextBox Me.Label2 = New System.Windows.Forms.Label Me.TextBox3 = New System.Windows.Forms.TextBox Me.Label3 = New System.Windows.Forms.Label Me.ErrorProvider1 = New System.Windows.Forms.ErrorProvider(Me.ruponents) CType(Me.ErrorProvider1, System.ruponentModel.ISupportInitialize).BeginInit() Me.SuspendLayout() " "Label1 " Me.Label1.AutoSize = True Me.Label1.Location = New System.Drawing.Point(8, 8) Me.Label1.Name = "Label1" Me.Label1.Size = New System.Drawing.Size(56, 13) Me.Label1.TabIndex = 0 Me.Label1.Text = "Five Digits" " "TextBox1 " Me.TextBox1.Location = New System.Drawing.Point(72, 8) Me.TextBox1.Name = "TextBox1" Me.TextBox1.Size = New System.Drawing.Size(80, 20) Me.TextBox1.TabIndex = 1 " "TextBox2 " Me.TextBox2.Location = New System.Drawing.Point(72, 32) Me.TextBox2.Name = "TextBox2" Me.TextBox2.Size = New System.Drawing.Size(80, 20) Me.TextBox2.TabIndex = 3 " "Label2 " Me.Label2.AutoSize = True Me.Label2.Location = New System.Drawing.Point(8, 32) Me.Label2.Name = "Label2" Me.Label2.Size = New System.Drawing.Size(56, 13) Me.Label2.TabIndex = 2 Me.Label2.Text = "Five Digits" " "TextBox3 " Me.TextBox3.Location = New System.Drawing.Point(72, 56) Me.TextBox3.Name = "TextBox3" Me.TextBox3.Size = New System.Drawing.Size(80, 20) Me.TextBox3.TabIndex = 5 " "Label3 " Me.Label3.AutoSize = True Me.Label3.Location = New System.Drawing.Point(8, 56) Me.Label3.Name = "Label3" Me.Label3.Size = New System.Drawing.Size(56, 13) Me.Label3.TabIndex = 4 Me.Label3.Text = "Five Digits" " "ErrorProvider1 " Me.ErrorProvider1.ContainerControl = Me " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(210, 83) Me.Controls.Add(Me.TextBox3) Me.Controls.Add(Me.Label3) Me.Controls.Add(Me.TextBox2) Me.Controls.Add(Me.Label2) Me.Controls.Add(Me.TextBox1) Me.Controls.Add(Me.Label1) Me.Name = "Form1" Me.Text = "Deferred Validation" CType(Me.ErrorProvider1, System.ruponentModel.ISupportInitialize).EndInit() Me.ResumeLayout(False) Me.PerformLayout() End Sub Friend WithEvents Label1 As System.Windows.Forms.Label Friend WithEvents TextBox1 As System.Windows.Forms.TextBox Friend WithEvents TextBox2 As System.Windows.Forms.TextBox Friend WithEvents Label2 As System.Windows.Forms.Label Friend WithEvents TextBox3 As System.Windows.Forms.TextBox Friend WithEvents Label3 As System.Windows.Forms.Label Friend WithEvents ErrorProvider1 As System.Windows.Forms.ErrorProvider
End Class
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