質問UpdateColumns()：メソッド（下記）またはイベント呼び出しのいずれかを変更して、OnTextChangedイベントを発生させている行のみを使用するにはどうすればよいですか？
現在、次のようにイベントをUpdateColumns()使用してメソッドを呼び出すことにより、GridViewセルの値を更新しています。OnTextChanged
<asp:TemplateField HeaderStyle-Width="35px">
<ItemTemplate>
<asp:TextBox OnTextChanged="UpdateColumns" ID="txtJan" CssClass="row"
runat="server" AutoPostBack="True" Text='<%# Eval("Jan","{0:#0}") %>'>
</asp:TextBox>
</ItemTemplate>
<HeaderTemplate>
Jan
</HeaderTemplate>
<FooterTemplate>
<asp:TextBox ID="txtJan" CssClass="row" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
以下は、イベントが発生するUpdateColumns()メソッドです。OnTextChangedテーブルの各行をループして計算を行います。GridViewには15列、10行あるため、操作が完了するまでに1秒ほどかかります。呼び出し元の行のみを表示するようにメソッドを変更するにはどうすればよいですか？基本的に、私は操作をより高速に実行し、無駄な計算を行わないようにしたいだけです。
Protected Sub UpdateColumns(ByVal sender As Object, ByVal e As EventArgs)
Dim errors As New StringBuilder
Try
For Each row As GridViewRow In gvBuildingBlocks.Rows
_tjan = CType(row.FindControl("txtJan"), TextBox)
_tfeb = CType(row.FindControl("txtFeb"), TextBox)
_tmar = CType(row.FindControl("txtMar"), TextBox)
_tapr = CType(row.FindControl("txtApr"), TextBox)
_tmay = CType(row.FindControl("txtMay"), TextBox)
_tjun = CType(row.FindControl("txtJun"), TextBox)
_tjul = CType(row.FindControl("txtJul"), TextBox)
_taug = CType(row.FindControl("txtAug"), TextBox)
_tsep = CType(row.FindControl("txtSep"), TextBox)
_toct = CType(row.FindControl("txtOct"), TextBox)
_tnov = CType(row.FindControl("txtNov"), TextBox)
_tdec = CType(row.FindControl("txtDec"), TextBox)
_tq1 = CType(row.FindControl("txtQ1"), TextBox)
_tq2 = CType(row.FindControl("txtQ2"), TextBox)
_tq3 = CType(row.FindControl("txtQ3"), TextBox)
_tq4 = CType(row.FindControl("txtQ4"), TextBox)
_th1 = CType(row.FindControl("txtH1"), TextBox)
_th2 = CType(row.FindControl("txtH2"), TextBox)
_tt = CType(row.FindControl("txtYear"), TextBox)
If IsNumeric(_tjan.Text) And IsNumeric(_tfeb.Text) _
And IsNumeric(_tmar.Text) And IsNumeric(_tapr.Text) _
And IsNumeric(_tmay.Text) And IsNumeric(_tjun.Text) _
And IsNumeric(_tjul.Text) And IsNumeric(_taug.Text) _
And IsNumeric(_tsep.Text) And IsNumeric(_toct.Text) _
And IsNumeric(_tnov.Text) And IsNumeric(_tdec.Text) Then
_bbjan = Decimal.Parse(_tjan.Text)
_bbfeb = Decimal.Parse(_tfeb.Text)
_bbmar = Decimal.Parse(_tmar.Text)
_bbapr = Decimal.Parse(_tapr.Text)
_bbmay = Decimal.Parse(_tmay.Text)
_bbjun = Decimal.Parse(_tjun.Text)
_bbjul = Decimal.Parse(_tjul.Text)
_bbaug = Decimal.Parse(_taug.Text)
_bbsep = Decimal.Parse(_tsep.Text)
_bboct = Decimal.Parse(_toct.Text)
_bbnov = Decimal.Parse(_tnov.Text)
_bbdec = Decimal.Parse(_tdec.Text)
_bbq1 = _bbjan + _bbfeb + _bbmar
_bbq2 = _bbapr + _bbmay + _bbjun
_bbq3 = _bbjul + _bbaug + _bbsep
_bbq4 = _bboct + _bbnov + _bbdec
_bbh1 = _bbq1 + _bbq2
_bbh2 = _bbq3 + _bbq4
_bbtt = _bbh1 + _bbh2
_tq1.Text = _bbq1.ToString()
_tq2.Text = _bbq2.ToString()
_tq3.Text = _bbq3.ToString()
_tq4.Text = _bbq4.ToString()
_th1.Text = _bbh1.ToString()
_th2.Text = _bbh2.ToString()
_tt.Text = _bbtt.ToString()
_totalJan += _bbjan
_totalFeb += _bbfeb
_totalMar += _bbmar
_totalApr += _bbapr
_totalMay += _bbmay
_totalJun += _bbjun
_totalJul += _bbjul
_totalAug += _bbaug
_totalSep += _bbsep
_totalOct += _bboct
_totalNov += _bbnov
_totalDec += _bbdec
_totalQ1 += _bbq1
_totalQ2 += _bbq2
_totalQ3 += _bbq3
_totalQ4 += _bbq4
_totalH1 += _bbh1
_totalH2 += _bbh2
_totalT += _bbtt
Else
errors.Append("Error! Input string must be numeric. Please correct error(s).")
End If
Next
If errors.Length > 0 Then
'gvBuildingBlocks.DataSource = CType(Session("buildingBlocks"), DataTable)
'gvBuildingBlocks.DataBind()
ShowMessage(errors.ToString)
End If
_tjan = CType(gvBuildingBlocks.FooterRow.FindControl("txtJan"), TextBox)
_tfeb = CType(gvBuildingBlocks.FooterRow.FindControl("txtFeb"), TextBox)
_tmar = CType(gvBuildingBlocks.FooterRow.FindControl("txtMar"), TextBox)
_tapr = CType(gvBuildingBlocks.FooterRow.FindControl("txtApr"), TextBox)
_tmay = CType(gvBuildingBlocks.FooterRow.FindControl("txtMay"), TextBox)
_tjun = CType(gvBuildingBlocks.FooterRow.FindControl("txtJun"), TextBox)
_tjul = CType(gvBuildingBlocks.FooterRow.FindControl("txtJul"), TextBox)
_taug = CType(gvBuildingBlocks.FooterRow.FindControl("txtAug"), TextBox)
_tsep = CType(gvBuildingBlocks.FooterRow.FindControl("txtSep"), TextBox)
_toct = CType(gvBuildingBlocks.FooterRow.FindControl("txtOct"), TextBox)
_tnov = CType(gvBuildingBlocks.FooterRow.FindControl("txtNov"), TextBox)
_tdec = CType(gvBuildingBlocks.FooterRow.FindControl("txtDec"), TextBox)
_tq1 = CType(gvBuildingBlocks.FooterRow.FindControl("txtQ1"), TextBox)
_tq2 = CType(gvBuildingBlocks.FooterRow.FindControl("txtQ2"), TextBox)
_tq3 = CType(gvBuildingBlocks.FooterRow.FindControl("txtQ3"), TextBox)
_tq4 = CType(gvBuildingBlocks.FooterRow.FindControl("txtQ4"), TextBox)
_th1 = CType(gvBuildingBlocks.FooterRow.FindControl("txtH1"), TextBox)
_th2 = CType(gvBuildingBlocks.FooterRow.FindControl("txtH2"), TextBox)
_tt = CType(gvBuildingBlocks.FooterRow.FindControl("txtYear"), TextBox)
_tjan.Text = _totalJan.ToString()
_tfeb.Text = _totalFeb.ToString()
_tmar.Text = _totalMar.ToString()
_tapr.Text = _totalApr.ToString()
_tmay.Text = _totalMay.ToString()
_tjun.Text = _totalJun.ToString()
_tjul.Text = _totalJul.ToString()
_taug.Text = _totalAug.ToString()
_tsep.Text = _totalSep.ToString()
_toct.Text = _totalOct.ToString()
_tnov.Text = _totalNov.ToString()
_tdec.Text = _totalDec.ToString()
_tq1.Text = _totalQ1.ToString()
_tq2.Text = _totalQ2.ToString()
_tq3.Text = _totalQ3.ToString()
_tq4.Text = _totalQ4.ToString()
_th1.Text = _totalH1.ToString()
_th2.Text = _totalH2.ToString()
_tt.Text = _totalT.ToString()
Catch ex As Exception
ShowError("Exception: ", ex.ToString())
End Try
End Sub