DataGridSortCommandEventArgs クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

DataGridSortCommandEventArgs クラス

DataGrid コントロールの SortCommand イベントのデータを提供します。このクラスは継承できません。

名前空間: System.Web.UI.WebControls
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public Class DataGridSortCommandEventArgs
    Inherits EventArgs

Visual Basic (使用法)

Dim instance As DataGridSortCommandEventArgs

public class DataGridSortCommandEventArgs :
 EventArgs

C++

public ref class DataGridSortCommandEventArgs
 : public EventArgs

public class DataGridSortCommandEventArgs extends
 EventArgs

JScript

public class DataGridSortCommandEventArgs extends
 EventArgs

解説

DataGrid コントロールの AllowSorting プロパティを true に設定して並べ替えを有効にすると、SortExpression プロパティが設定されている各列のヘッダーに LinkButton コントロールが表示されます。自動的に生成された列の場合、SortExpression プロパティにはデータフィールドと同じ値が格納されます。これらのリンクにより、選択した列ごとに DataGrid コントロールを並べ替えることができます。SortCommand イベントは、LinkButton コントロールがクリックされたときに発生します。

DataGridSortCommandEventArgs のインスタンスの初期プロパティ値の一覧については、DataGridSortCommandEventArgs コンストラクタのトピックを参照してください。

イベント処理の詳細については、「イベントとデリゲート」を参照してください。

使用例

SortCommand イベントのハンドラを指定およびコーディングして、DataGrid コントロールを並べ替える方法を次のコード例に示します。

Visual Basic

<%@ Page Language="VB" AutoEventWireup="True"
 %>
<%@ Import Namespace="System.Data"
 %>
 
<html>
   <script runat="server">
 
      Function CreateDataSource() As ICollection
 
      
         ' Create a Random object to mix up the order of items in the
         ' sample data.
         Dim Rand_Num As Random = New
 Random()

         ' Create sample data for the DataGrid control.
         Dim dt As DataTable = New
 DataTable()
         Dim dr As DataRow
 
         ' Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue",
 GetType(Int32)))
         dt.Columns.Add(new DataColumn("StringValue",
 GetType(String)))
         dt.Columns.Add(new DataColumn("CurrencyValue",
 GetType(Double)))
 
         ' Populate the table with sample values.
         Dim i As Integer

         For i = 0 To 8 
        
            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & Rand_Num.Next(1,
 15).ToString()
            dr(2) = 1.23 * Rand_Num.Next(1, 15)
 
            dt.Rows.Add(dr)
         
         Next i

         ' To persist the data source between posts to the server,
         ' store it in session state.  
         Session("Source") = dt
 
         Dim dv As DataView = New
 DataView(dt)

         Return dv
      
      End Function
 
      Sub Page_Load(sender As Object,
 e As EventArgs) 
 
         ' Load sample data only once, when the page is first loaded.
         If Not IsPostBack Then
 
         
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()
         
         End If

      End Sub

      Sub Sort_Grid(sender As Object,
 e As DataGridSortCommandEventArgs) 

         ' Retrieve the data source from session state.
         Dim dt As DataTable = CType(Session("Source"),
 DataTable)

         ' Create a DataView from the DataTable.
         Dim dv As DataView = New
 DataView(dt)

         ' The DataView provides an easy way to sort. Simply set the
         ' Sort property with the name of the field to sort by.
         dv.Sort = e.SortExpression

         ' Rebind the data source and specify that it should be sorted
         ' by the field specified in the SortExpression property.
         ItemsGrid.DataSource = dv
         ItemsGrid.DataBind()

      End Sub

      Sub Check_Change(sender As Object,
 e As EventArgs)
   
         ' Allow or prevent sorting depending on the user's selection.
         If AllowSortingCheckBox.Checked Then

            ItemsGrid.AllowSorting = True

         Else

            ItemsGrid.AllowSorting = False

         End If

         ' After changing the property, rebind the data to
         ' refresh the DataGrid control.

         ' Retrieve the data source from session state.
         Dim dt As DataTable = CType(Session("Source"),
 DataTable)

         ' Create a DataView from the DataTable.
         Dim dv As DataView = New
 DataView(dt)

         ' Rebind the data source.
         ItemsGrid.DataSource = dv
         ItemsGrid.DataBind()

      End Sub

   </script>
 
<body>
 
   <form runat=server>
 
      <h3>DataGrid AllowSorting Example</h3>

      Select whether to allow sorting in
 the DataGrid control.

      <br><br>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           OnSortCommand="Sort_Grid"
           AutoGenerateColumns="False"
           AllowSorting="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue"
 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue"
 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr>

      <asp:CheckBox id="AllowSortingCheckBox"
           Text="Allow sorting"
           AutoPostBack="True"
           Checked="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>
 
   </form>
 
</body>
</html>

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<html>
   <script runat="server">
 
      ICollection CreateDataSource()
      {
      
         // Create a Random object to mix up the order of items in the
         // sample data.
         Random Rand_Num = new Random();

         // Create sample data for the DataGrid control.
         DataTable dt = new DataTable();
         DataRow dr;
 
         // Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue",
 typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue",
 typeof(String)));
         dt.Columns.Add(new DataColumn("CurrencyValue",
 typeof(Double)));
 
         // Populate the table with sample values.
         for (int i=0; i<=8; i++) 
         {

            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + Rand_Num.Next(1, 15).ToString();
            dr[2] = 1.23 * Rand_Num.Next(1, 15);
 
            dt.Rows.Add(dr);
         
         }

         // To persist the data source between posts to the server,
         // store it in session state.  
         Session["Source"] = dt;
 
         DataView dv = new DataView(dt);

         return dv;
      
      }
 
      void Page_Load(Object sender, EventArgs e)
      { 
 
         // Load sample data only once, when the page is first loaded.
         if (!IsPostBack)
         { 
         
            ItemsGrid.DataSource = CreateDataSource();
            ItemsGrid.DataBind();
         
         }

      }

      void Sort_Grid(Object sender, DataGridSortCommandEventArgs
 e)
      { 

         // Retrieve the data source from session state.
         DataTable dt = (DataTable)Session["Source"];

         // Create a DataView from the DataTable.
         DataView dv = new DataView(dt);

         // The DataView provides an easy way to sort. Simply set the
         // Sort property with the name of the field to sort by.
         dv.Sort = e.SortExpression;

         // Rebind the data source and specify that it should be sorted
         // by the field specified in the SortExpression property.
         ItemsGrid.DataSource = dv;
         ItemsGrid.DataBind();

      }

      void Check_Change(Object sender, EventArgs e)
      {
   
         // Allow or prevent sorting depending on the user's selection.
         if (AllowSortingCheckBox.Checked)
         {

            ItemsGrid.AllowSorting = true;

         }
         else
         {

            ItemsGrid.AllowSorting = false;

         }

         // After changing the property, rebind the data to
         // refresh the DataGrid control.

         // Retrieve the data source from session state.
         DataTable dt = (DataTable)Session["Source"];

         // Create a DataView from the DataTable.
         DataView dv = new DataView(dt);

         // Rebind the data source.
         ItemsGrid.DataSource = dv;
         ItemsGrid.DataBind();

      }

   </script>
 
<body>
 
   <form runat=server>
 
      <h3>DataGrid AllowSorting Example</h3>

      Select whether to allow sorting in the DataGrid control.

      <br><br>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           OnSortCommand="Sort_Grid"
           AutoGenerateColumns="False"
           AllowSorting="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue" 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue" 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr>

      <asp:CheckBox id="AllowSortingCheckBox"
           Text="Allow sorting"
           AutoPostBack="True"
           Checked="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>
 
   </form>
 
</body>
</html>

Visual Basic

<%@ Page Language="VB" AutoEventWireup="True"
 %>
<%@ Import Namespace="System.Data"
 %>
 
<html>
   <script runat="server">
 
      Function CreateDataSource() As ICollection
 
      
         ' Create a Random object to mix up the order of items in the
 sample data.
         Dim Rand_Num As Random = New
 Random()

         ' Create sample data for the DataGrid control.
         Dim dt As DataTable = New
 DataTable()
         Dim dr As DataRow
 
         ' Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue",
 GetType(Int32)))
         dt.Columns.Add(new DataColumn("StringValue",
 GetType(String)))
         dt.Columns.Add(new DataColumn("CurrencyValue",
 GetType(Double)))
 
         ' Populate the table with sample values.
         Dim i As Integer

         For i = 0 To 8 
        
            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & Rand_Num.Next(1,
 15).ToString()
            dr(2) = 1.23 * Rand_Num.Next(1, 15)
 
            dt.Rows.Add(dr)
         
         Next i

         ' To persist the data source between posts to the server, store
 it
         ' in session state.  
         Session("Source") = dt
 
         Dim dv As DataView = New
 DataView(dt)

         Return dv
      
      End Function
 
      Sub Page_Load(sender As Object,
 e As EventArgs) 
 
         ' Load sample data only once, when the page is first loaded.
         If Not IsPostBack Then
 
         
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()
         
         End If

         ' Manually register the event-handling method for the PageIndexChanged
  
         ' event of the DataGrid control.
         AddHandler ItemsGrid.SortCommand, AddressOf
 Sort_Grid

      End Sub

      Sub Sort_Grid(sender As Object,
 e As DataGridSortCommandEventArgs) 

         ' Retrieve the data source from session state.
         Dim dt As DataTable = CType(Session("Source"),
 DataTable)

         ' Create a DataView from the DataTable.
         Dim dv As DataView = New
 DataView(dt)

         ' The DataView provides an easy way to sort. Simply set the
 Sort property with
         ' the name of the field to sort by.
         dv.Sort = e.SortExpression

         ' Re-bind the data source and specify that it should be sorted
         ' by the field specified in the SortExpression property.
         ItemsGrid.DataSource = dv
         ItemsGrid.DataBind()

      End Sub

      Sub Check_Change(sender As Object,
 e As EventArgs)
   
         ' Allow or prevent sorting depending on the user's selection.
         If AllowSortingCheckBox.Checked Then

            ItemsGrid.AllowSorting = True

         Else

            ItemsGrid.AllowSorting = False

         End If

         ' After changing the property, re-bind the data to
         ' refresh the DataGrid control.

         ' Retrieve the data source from session state.
         Dim dt As DataTable = CType(Session("Source"),
 DataTable)

         ' Create a DataView from the DataTable.
         Dim dv As DataView = New
 DataView(dt)

         ' Re-bind the data source.
         ItemsGrid.DataSource = dv
         ItemsGrid.DataBind()

      End Sub

   </script>
 
<body>
 
   <form runat=server>
 
      <h3>DataGrid SortCommand Example</h3>

      Select whether to allow sorting in
 the DataGrid control.

      <br><br>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="False"
           AllowSorting="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue"
 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue"
 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr>

      <asp:CheckBox id="AllowSortingCheckBox"
           Text="Allow sorting"
           AutoPostBack="True"
           Checked="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>
 
   </form>
 
</body>
</html>

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<html>
   <script runat="server">
 
      ICollection CreateDataSource()
      {
      
         // Create a Random object to mix up the order of items in the
 sample data.
         Random Rand_Num = new Random();

         // Create sample data for the DataGrid control.
         DataTable dt = new DataTable();
         DataRow dr;
 
         // Define the columns of the table.
         dt.Columns.Add(new DataColumn("IntegerValue",
 typeof(Int32)));
         dt.Columns.Add(new DataColumn("StringValue",
 typeof(String)));
         dt.Columns.Add(new DataColumn("CurrencyValue",
 typeof(Double)));
 
         // Populate the table with sample values.
         for (int i=0; i<=8; i++) 
         {

            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + Rand_Num.Next(1, 15).ToString();
            dr[2] = 1.23 * Rand_Num.Next(1, 15);
 
            dt.Rows.Add(dr);
         
         }

         // To persist the data source between posts to the server,
 store it
         // in session state.  
         Session["Source"] = dt;
 
         DataView dv = new DataView(dt);

         return dv;
      
      }
 
      void Page_Load(Object sender, EventArgs e)
      { 
 
         // Load sample data only once, when the page is first loaded.
         if (!IsPostBack)
         { 
         
            ItemsGrid.DataSource = CreateDataSource();
            ItemsGrid.DataBind();
         
         }

         // Manually register the event-handling method for the PageIndexChanged
  
         // event of the DataGrid control.
         ItemsGrid.SortCommand += new DataGridSortCommandEventHandler(this.Sort_Grid);

      }

      void Sort_Grid(Object sender, DataGridSortCommandEventArgs
 e)
      { 

         // Retrieve the data source from session state.
         DataTable dt = (DataTable)Session["Source"];

         // Create a DataView from the DataTable.
         DataView dv = new DataView(dt);

         // The DataView provides an easy way to sort. Simply set the
 Sort property with
         // the name of the field to sort by.
         dv.Sort = e.SortExpression;

         // Re-bind the data source and specify that it should be sorted
         // by the field specified in the SortExpression property.
         ItemsGrid.DataSource = dv;
         ItemsGrid.DataBind();

      }

      void Check_Change(Object sender, EventArgs e)
      {
   
         // Allow or prevent sorting depending on the user's selection.
         if (AllowSortingCheckBox.Checked)
         {

            ItemsGrid.AllowSorting = true;

         }
         else
         {

            ItemsGrid.AllowSorting = false;

         }

         // After changing the property, re-bind the data to
         // refresh the DataGrid control.

         // Retrieve the data source from session state.
         DataTable dt = (DataTable)Session["Source"];

         // Create a DataView from the DataTable.
         DataView dv = new DataView(dt);

         // Re-bind the data source.
         ItemsGrid.DataSource = dv;
         ItemsGrid.DataBind();

      }

   </script>
 
<body>
 
   <form runat=server>
 
      <h3>DataGrid SortCommand Example</h3>

      Select whether to allow sorting in the DataGrid control.

      <br><br>
 
      <b>Product List</b>
 
      <asp:DataGrid id="ItemsGrid"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           AutoGenerateColumns="False"
           AllowSorting="True"
           runat="server">

         <HeaderStyle BackColor="#00aaaa">
         </HeaderStyle>

         <Columns>

            <asp:BoundColumn DataField="IntegerValue" 
                 SortExpression="IntegerValue"
                 HeaderText="Item"/>

            <asp:BoundColumn DataField="StringValue"
                 SortExpression="StringValue" 
                 HeaderText="Description"/>

            <asp:BoundColumn DataField="CurrencyValue" 
                 HeaderText="Price"
                 SortExpression="CurrencyValue"
                 DataFormatString="{0:c}">

               <ItemStyle HorizontalAlign="Right">
               </ItemStyle>

            </asp:BoundColumn>

         </Columns> 
 
      </asp:DataGrid>

      <hr>

      <asp:CheckBox id="AllowSortingCheckBox"
           Text="Allow sorting"
           AutoPostBack="True"
           Checked="True"
           OnCheckedChanged="Check_Change"
           runat="server"/>
 
   </form>
 
</body>
</html>

.NET Framework のセキュリティ

AspNetHostingPermission (ホスト環境での動作に必要なアクセス許可)。要求値 : LinkDemand。アクセス許可値 : Minimal。
AspNetHostingPermission (ホスト環境での動作に必要なアクセス許可)。要求値 : InheritanceDemand。アクセス許可値 : Minimal。

継承階層

System.Object
System.EventArgs
System.Web.UI.WebControls.DataGridSortCommandEventArgs

スレッドセーフ

この型の public static (Visual Basic では Shared) メンバはすべて、スレッドセーフです。インスタンスメンバの場合は、スレッドセーフであるとは限りません。

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
DataGridSortCommandEventArgs メンバ
System.Web.UI.WebControls 名前空間
DataGridSortCommandEventHandler
DataGrid クラス
DataGrid.SortCommand イベント

>> 「DataGridSortCommandEventArgs クラス」を含む用語の索引
DataGridSortCommandEventArgs クラスのページへのリンク

DataGridSortCommandEventArgs クラスとは？わかりやすく解説

DataGridSortCommandEventArgs クラス

「DataGridSortCommandEventArgs クラス」の関連用語


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DataGridSortCommandEventArgs クラスとは？ わかりやすく解説

DataGridSortCommandEventArgs クラス

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「DataGridSortCommandEventArgs クラス」の関連用語

DataGridSortCommandEventArgs クラスとは？わかりやすく解説