'宣言 Sub BeginCustomSummary( _ ByVal summarySettings As SummarySettings, _ ByVal rows As RowsCollection _ )
void BeginCustomSummary( SummarySettings summarySettings, RowsCollection rows )
rows 引数は summarySettings オブジェクトが指定されるバンドからの行コレクションです。
Imports Infragistics.Shared Imports Infragistics.Win Imports Infragistics.Win.UltraWinGrid ' A class that calculates the totals for orders. Private Class OrderTotalsSummary Implements ICustomSummaryCalculator Private totals As Decimal = 0 Public Sub New() End Sub Private Sub BeginCustomSummary(ByVal summarySettings As SummarySettings, ByVal rows As RowsCollection) Implements ICustomSummaryCalculator.BeginCustomSummary ' Begins the summary for the SummarySettings object passed in. Implementation of ' this method should reset any state variables used for calculating the summary. Me.totals = 0 End Sub Private Sub AggregateCustomSummary(ByVal summarySettings As SummarySettings, ByVal row As UltraGridRow) Implements ICustomSummaryCalculator.AggregateCustomSummary ' Here is where we process each row that gets passed in. Dim unitPrice As Object = row.GetCellValue(summarySettings.SourceColumn.Band.Columns("Unit Price")) Dim quantity As Object = row.GetCellValue(summarySettings.SourceColumn.Band.Columns("Quantity")) ' Handle null values If unitPrice Is DBNull.Value Or quantity Is DBNull.Value Then Return End If ' Convert to decimal. Try Dim nUnitPrice As Decimal = Convert.ToDecimal(unitPrice) Dim nQuantity As Decimal = Convert.ToDecimal(quantity) Me.totals += nQuantity * nUnitPrice Catch e As Exception ' This should not happen if the columns are numeric. Debug.Assert(False, "Exception thrown while trying to convert cell's value to decimal !") End Try End Sub Private Function EndCustomSummary(ByVal summarySettings As SummarySettings, ByVal rows As RowsCollection) Implements ICustomSummaryCalculator.EndCustomSummary ' This gets called when the every row has been processed so here is where we ' would return the calculated summary value. Return Me.totals End Function End Class Private Sub Button12_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button12.Click Dim band As UltraGridBand = Me.ultraGrid1.DisplayLayout.Bands(2) ' Add the OrderTotals custom summary. Dim summary As SummarySettings = band.Summaries.Add("OrderTotals", SummaryType.Custom, _ New OrderTotalsSummary(), band.Columns("Unit Price"), SummaryPosition.Left, Nothing) ' Set the format with which to format the calculated summary when displaying ' in the summary footer. summary.DisplayFormat = "Sales Total = {0:######.00}" ' Set the horizontal text align to right so that the text summary text is aligned ' right in the summary element. summary.Appearance.TextHAlign = HAlign.Right ' Set the summary position to Left so that it shows up on the left of the ' summary footer area. summary.SummaryPosition = SummaryPosition.Right ' Set the appearance of the summary. summary.Appearance.FontData.Bold = DefaultableBoolean.True summary.Appearance.ForeColor = Color.Maroon summary.Appearance.BackColor = Color.LightGray ' Set the text that shows up in the caption of the summary footer. band.SummaryFooterCaption = "Total Sales for Order (OrderID)" ' Set the appearance of the summary footer area. Me.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.FontData.Bold = DefaultableBoolean.True Me.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.BackColor = Color.White Me.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.ForeColor = Color.Black ' Set the appearance for the caption on top of the summary area. Me.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionVisible = DefaultableBoolean.True Me.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionAppearance.BackColor = Color.DarkBlue Me.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionAppearance.ForeColor = Color.LightYellow End Sub
using Infragistics.Shared; using Infragistics.Win; using Infragistics.Win.UltraWinGrid; using System.Diagnostics; // A class that calculates the totals for orders. private class OrderTotalsSummary : ICustomSummaryCalculator { private decimal totals = 0; internal OrderTotalsSummary( ) { } public void BeginCustomSummary( SummarySettings summarySettings, RowsCollection rows ) { // Begins the summary for the SummarySettings object passed in. Implementation of // this method should reset any state variables used for calculating the summary. this.totals = 0; } public void AggregateCustomSummary( SummarySettings summarySettings, UltraGridRow row ) { // Here is where we process each row that gets passed in. object unitPrice = row.GetCellValue( summarySettings.SourceColumn.Band.Columns["Unit Price"] ); object quantity = row.GetCellValue( summarySettings.SourceColumn.Band.Columns["Quantity"] ); // Handle null values if ( unitPrice is DBNull || quantity is DBNull ) { return; } // Convert to decimal. try { decimal nUnitPrice = Convert.ToDecimal( unitPrice ); decimal nQuantity = Convert.ToDecimal( quantity ); this.totals += nQuantity * nUnitPrice; } catch ( Exception ) { // This should not happen if the columns are numeric. Debug.Assert( false, "Exception thrown while trying to convert cell's value to decimal !" ); } } public object EndCustomSummary( SummarySettings summarySettings, RowsCollection rows ) { // This gets called when the every row has been processed so here is where we // would return the calculated summary value. return this.totals; } } private void button12_Click(object sender, System.EventArgs e) { UltraGridBand band = this.ultraGrid1.DisplayLayout.Bands[2]; // Add the OrderTotals custom summary. SummarySettings summary = band.Summaries.Add( "OrderTotals", // Give an identifier (key) for this summary SummaryType.Custom, // Summary type is custom new OrderTotalsSummary( ), // Our custom summary calculator band.Columns["Unit Price"], // Column being summarized. Just use Unit Price column. SummaryPosition.Left, // Position the summary on the left of summary footer null // Since SummaryPosition is Left, pass in null ); // Set the format with which to format the calculated summary when displaying // in the summary footer. summary.DisplayFormat = "Sales Total = {0:######.00}"; // Set the horizontal text align to right so that the text summary text is aligned // right in the summary element. summary.Appearance.TextHAlign = HAlign.Right; // Set the summary position to Left so that it shows up on the left of the // summary footer area. summary.SummaryPosition = SummaryPosition.Right; // Set the appearance of the summary. summary.Appearance.FontData.Bold = DefaultableBoolean.True; summary.Appearance.ForeColor = Color.Maroon; summary.Appearance.BackColor = Color.LightGray; // Set the text that shows up in the caption of the summary footer. band.SummaryFooterCaption = "Total Sales for Order [OrderID]"; // Set the appearance of the summary footer area. this.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.FontData.Bold = DefaultableBoolean.True; this.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.BackColor = Color.White; this.ultraGrid1.DisplayLayout.Override.SummaryFooterAppearance.ForeColor = Color.Black; // Set the appearance for the caption on top of the summary area. this.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionVisible = DefaultableBoolean.True; this.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionAppearance.BackColor = Color.DarkBlue; this.ultraGrid1.DisplayLayout.Override.SummaryFooterCaptionAppearance.ForeColor = Color.LightYellow; }