'宣言 Public Function ToErrorValue() As UltraCalcErrorValue
public UltraCalcErrorValue ToErrorValue()
このメソッドは、エラー コードがこのインスタンスのエラー コードに設定される UltraCalcErrorValue を返します。
カルチャ固有の書式設定情報を提供する UltraCalcErrorValue インターフェイス実装。
Imports Infragistics.Shared Imports Infragistics.Win Imports Infragistics.Win.UltraWinGrid Imports Infragistics.Win.CalcEngine Imports Infragistics.Win.UltraWinCalcManager Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load ' Ensure that the form contains an UltraCalcManager and two textboxes, ' one named textBox1 and the other named textBox2. Dim calcSettings As CalcSettings = New CalcSettings() ' This formula will multiply the value of textBox2 by 2. calcSettings.Formula = "2 * [textBox2]" calcSettings.PropertyName = "Text" Me.UltraCalcManager1.SetCalcSettings(Me.TextBox1, calcSettings) calcSettings = New CalcSettings() calcSettings.PropertyName = "Text" ' Treat the values of the textBox2 as double. Text property of TextBox is ' a string type and since textBox2 is a source of value to a formula, indicate ' to the calc-manager that the value should be treated as a double rather ' than as a string. calcSettings.TreatAsType = GetType(Double) Me.UltraCalcManager1.SetCalcSettings(Me.TextBox2, calcSettings) End Sub Private Sub UltraCalcManager1_ParseValue(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinCalcManager.ParseValueEventArgs) Handles ultraCalcManager1.ParseValue ' ParseValue gets fired on all controls that are source of values in formulas. If e.Control Is Me.textBox2 Then ' Get the text of the textBox2. Dim text As String = Me.textBox2.Text If 0 = text.Length Then ' If the textbox is empty, then you can return an error. By default the ' calc manager considers empty strings to be 0. e.Value = New UltraCalcValue(New UltraCalcErrorValue(UltraCalcErrorCode.Num, "Not a Number")) Else ' Otherwise parse the text to a double and return that as the value. ' The calc manager by default uses InvariantCulture to parse text into ' numeric values. Typically you want to use the current culture to parse ' text into numeric values. ParseValue event is especially useful for that. e.Value = New UltraCalcValue(Double.Parse(text)) End If e.Handled = True End If End Sub Private Sub UltraCalcManager1_FormatValue(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinCalcManager.FormatValueEventArgs) Handles ultraCalcManager1.FormatValue ' FormatValue gets fired on all controls that are target of formula evaluations. If e.Control Is Me.textBox1 Then If e.CalcValue.IsError Then ' There was an error in formula evaluation. e.Value = e.CalcValue.ToErrorValue().Message ElseIf e.CalcValue.IsDBNull Or e.CalcValue.IsNull Then ' Result is DBNull or Null. e.Value = "(NULL)" Else Dim doubleVal As Double If e.CalcValue.ToDouble(doubleVal) Then ' ToDouble returns true if the value was a double. e.Value = CType(doubleVal, Decimal).ToString("c") Else ' Otherwise convert the value to a string using current culture. e.Value = e.CalcValue.ToString(System.Globalization.CultureInfo.CurrentCulture) End If End If End If End Sub
using Infragistics.Shared; using Infragistics.Win; using Infragistics.Win.UltraWinGrid; using System.Diagnostics; using Infragistics.Win.CalcEngine; using Infragistics.Win.UltraWinCalcManager; private void Form1_Load(object sender, System.EventArgs e) { // Ensure that the form contains an UltraCalcManager and two textboxes, // one named textBox1 and the other named textBox2. CalcSettings calcSettings = new CalcSettings( ); // This formula will multiply the value of textBox2 by 2. calcSettings.Formula = "2 * [//textBox2]"; calcSettings.PropertyName = "Text"; this.ultraCalcManager1.SetCalcSettings( this.textBox1, calcSettings ); calcSettings = new CalcSettings( ); calcSettings.PropertyName = "Text"; // Treat the values of the textBox2 as double. Text property of TextBox is // a string type and since textBox2 is a source of value to a formula, indicate // to the calc-manager that the value should be treated as a double rather // than as a string. calcSettings.TreatAsType = typeof( double ); this.ultraCalcManager1.SetCalcSettings( this.textBox2, calcSettings ); } private void ultraCalcManager1_ParseValue(object sender, Infragistics.Win.UltraWinCalcManager.ParseValueEventArgs e) { // ParseValue gets fired on all controls that are source of values in formulas. if ( e.Control == this.textBox2 ) { // Get the text of the textBox2. string text = this.textBox2.Text; if ( 0 == text.Length ) { // If the textbox is empty, then you can return an error. By default the // calc manager considers empty strings to be 0. e.Value = new UltraCalcValue( new UltraCalcErrorValue( UltraCalcErrorCode.Num, "Not a Number" ) ); } else { // Otherwise parse the text to a double and return that as the value. // The calc manager by default uses InvariantCulture to parse text into // numeric values. Typically you want to use the current culture to parse // text into numeric values. ParseValue event is especially useful for that. e.Value = new UltraCalcValue( double.Parse( text ) ); } e.Handled = true; } } private void ultraCalcManager1_FormatValue(object sender, Infragistics.Win.UltraWinCalcManager.FormatValueEventArgs e) { // FormatValue gets fired on all controls that are target of formula evaluations. if ( e.Control == this.textBox1 ) { if ( e.CalcValue.IsError ) { // There was an error in formula evaluation. e.Value = e.CalcValue.ToErrorValue( ).Message; } else if ( e.CalcValue.IsDBNull || e.CalcValue.IsNull ) { // Result is DBNull or Null. e.Value = "(NULL)"; } else { double doubleVal; if ( e.CalcValue.ToDouble( out doubleVal ) ) { // ToDouble returns true if the value was a double. e.Value = ((decimal)doubleVal).ToString( "c" ); } else { // Otherwise convert the value to a string using current culture. e.Value = e.CalcValue.ToString( System.Globalization.CultureInfo.CurrentCulture ); } } } }