DataGrid.OnItemCreated(DataGridItemEventArgs) Méthode

Référence

Définition

Espace de noms:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

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Déclenche l’événement ItemCreated. Cela vous permet de fournir un gestionnaire personnalisé à l'événement.

protected:
 virtual void OnItemCreated(System::Web::UI::WebControls::DataGridItemEventArgs ^ e);

protected virtual void OnItemCreated (System.Web.UI.WebControls.DataGridItemEventArgs e);

abstract member OnItemCreated : System.Web.UI.WebControls.DataGridItemEventArgs -> unit
override this.OnItemCreated : System.Web.UI.WebControls.DataGridItemEventArgs -> unit

Protected Overridable Sub OnItemCreated (e As DataGridItemEventArgs)

Paramètres

e: DataGridItemEventArgs

DataGridItemEventArgs qui contient des données d’événement.

Exemples

L’exemple de code suivant montre comment spécifier et coder un gestionnaire pour l’événement ItemCreated afin d’afficher l’ordre dans lequel les éléments sont créés dans le DataGrid contrôle.

<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<script language="C#" runat="server">
 
   DataTable Cart;
   DataView CartView;
 
   ICollection CreateDataSource() 
   {
      DataTable dt = new DataTable();
      DataRow dr;
 
      dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
      dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
      dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
 
      for (int i = 0; i < 10; i++) 
      {
         dr = dt.NewRow();
 
         dr[0] = i;
         dr[1] = "Item " + i.ToString();
         dr[2] = 1.23 * (i+1);
 
         dt.Rows.Add(dr);
      }
 
      DataView dv = new DataView(dt);
      return dv;
   }
 
   void Page_Load(Object sender, EventArgs e) 
   {
 
      if (!IsPostBack) 
      {
         // Need to load this data only once.
         ItemsGrid.DataSource = CreateDataSource();
         ItemsGrid.DataBind();
      }
 
   }
 
   void Item_Created(Object sender, DataGridItemEventArgs e) 
   {
 
      Label1.Text = Label1.Text + " " + e.Item.ItemIndex;
 
   }
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemCreated="Item_Created"
           AutoGenerateColumns="true">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>
 
      <br />
 
      <asp:Label id="Label1" 
           Text="Order of items created: " 
           runat="server"/>

      <br />

      <asp:Label id="Label2" 
           Text="Note: The -1's refer to the header and footer." 
           runat="server"/>
 
   </form>
 
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<script language="VB" runat="server">
 
    Dim Cart As DataTable
    Dim CartView As DataView
    
    Function CreateDataSource() As ICollection
        Dim dt As New DataTable()
        Dim dr As DataRow
        
        dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
        dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
        dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
        
        Dim i As Integer
        For i = 0 To 9
            dr = dt.NewRow()
            
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = 1.23 *(i + 1)
            
            dt.Rows.Add(dr)
        Next i
        
        Dim dv As New DataView(dt)
        Return dv
    End Function 'CreateDataSource


    Sub Page_Load(sender As Object, e As EventArgs)
        
        If Not IsPostBack Then
            ' Need to load this data only once.
            ItemsGrid.DataSource = CreateDataSource()
            ItemsGrid.DataBind()
        End If
    End Sub 'Page_Load
     

    Sub Item_Created(sender As Object, e As DataGridItemEventArgs)
        
        Label1.Text = Label1.Text & " " & e.Item.ItemIndex
    End Sub 'Item_Created 
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemCreated="Item_Created"
           AutoGenerateColumns="true">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>
 
      <br />
 
      <asp:Label id="Label1" 
           Text="Order of items created: " 
           runat="server"/>

      <br />

      <asp:Label id="Label2" 
           Text="Note: The -1's refer to the header and footer." 
           runat="server"/>
 
   </form>
 
</body>
</html>


<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      ICollection CreateDataSource()
      {

         // 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<=10; i++) 
         {

            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = 1.23 * (i + 1);
 
            dt.Rows.Add(dr);
         
         }
 
         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 Item_Created(Object sender, DataGridItemEventArgs e) 
      {
 
         // Customize the footer section with an image.
         if(e.Item.ItemType == ListItemType.Footer)
         {         
 
           // Create an Image control.
           System.Web.UI.WebControls.Image NewImageControl = new System.Web.UI.WebControls.Image();

           // Set the properties of the Image control.
           NewImageControl.ImageUrl = "Image1.jpg"; 
           NewImageControl.AlternateText = "Image 1";
           
           // Add the Image control to the Controls collection of the 
           // cell representing the third column in the DataGrid.
           e.Item.Cells[2].Controls.Add(NewImageControl);

         }         
 
      }
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemCreated="Item_Created">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>

   </form>
 
</body>
</html>


<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      Function CreateDataSource() As ICollection

         ' 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 10 

            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = 1.23 * (i + 1)
 
            dt.Rows.Add(dr)
         
         Next i
 
         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 Item_Created(sender As Object, e As DataGridItemEventArgs) 
 
         ' Customize the footer section with an image.
         If e.Item.ItemType = ListItemType.Footer Then         
 
           ' Create an Image control.
           Dim NewImageControl As System.Web.UI.WebControls.Image = New System.Web.UI.WebControls.Image()

           ' Set the properties of the Image control.
           NewImageControl.ImageUrl = "Image1.jpg"
           NewImageControl.AlternateText = "Image 1"
           
           ' Add the Image control to the Controls collection of the 
           ' cell representing the third column in the DataGrid.
           e.Item.Cells(2).Controls.Add(NewImageControl)

         End If         
 
      End Sub
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true"
           OnItemCreated="Item_Created">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>

   </form>
 
</body>
</html>


<%@ Page Language="C#" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      ICollection CreateDataSource()
      {

         // 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<=10; i++) 
         {

            dr = dt.NewRow();
 
            dr[0] = i;
            dr[1] = "Item " + i.ToString();
            dr[2] = 1.23 * (i + 1);
 
            dt.Rows.Add(dr);
         
         }
 
         DataView dv = new DataView(dt);

         return dv;
      
      }
 
      void Page_Load(Object sender, EventArgs e)
      { 
 
         // Manually register the event-handling method for the ItemCreated  
         // event of the DataGrid control.
         ItemsGrid.ItemCreated += 
             new DataGridItemEventHandler(this.Item_Created);

         // Load sample data only once, when the page is first loaded.
         if (!IsPostBack)
         { 
         
            ItemsGrid.DataSource = CreateDataSource();
            ItemsGrid.DataBind();
         
         }

      }
 
      void Item_Created(Object sender, DataGridItemEventArgs e) 
      {
 
         // Customize the footer section with an image.
         if(e.Item.ItemType == ListItemType.Footer)
         {         
 
           // Create an Image control.
           System.Web.UI.WebControls.Image NewImageControl = new System.Web.UI.WebControls.Image();

           // Set the properties of the Image control.
           NewImageControl.ImageUrl = "Image1.jpg"; 
           NewImageControl.AlternateText = "Image 1";

           // Add the Image control to the Controls collection of the 
           // cell representing the third column in the DataGrid.
           e.Item.Cells[2].Controls.Add(NewImageControl);

         }         
 
      }
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>

   </form>
 
</body>
</html>


<%@ Page Language="VB" AutoEventWireup="True" %>
<%@ Import Namespace="System.Data" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <script runat="server">
 
      Function CreateDataSource() As ICollection

         ' 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 10 

            dr = dt.NewRow()
 
            dr(0) = i
            dr(1) = "Item " & i.ToString()
            dr(2) = 1.23 * (i + 1)
 
            dt.Rows.Add(dr)
         
         Next i
 
         Dim dv As DataView = New DataView(dt)

         return dv
      
      End Function
 
      Sub Page_Load(sender As Object, e As EventArgs)

         ' Manually register the event-handling method for the ItemCreated  
         ' event of the DataGrid control.
         AddHandler ItemsGrid.ItemCreated, AddressOf Item_Created
 
         ' 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 Item_Created(sender As Object, e As DataGridItemEventArgs) 
 
         ' Customize the footer section with an image.
         If e.Item.ItemType = ListItemType.Footer Then         
 
           ' Create an Image control.
           Dim NewImageControl As System.Web.UI.WebControls.Image = New System.Web.UI.WebControls.Image()

           ' Set the properties of the Image control.
           NewImageControl.ImageUrl = "Image1.jpg"
           NewImageControl.AlternateText = "Image 1"

           ' Add the Image control to the Controls collection of the 
           ' cell representing the third column in the DataGrid.
           e.Item.Cells(2).Controls.Add(NewImageControl)

         End If         
 
      End Sub
 
</script>
 
<head runat="server">
    <title>DataGrid ItemCreated Example</title>
</head>
<body>
 
   <form id="form1" runat="server">

      <h3>DataGrid ItemCreated Example</h3>
 
      <asp:DataGrid id="ItemsGrid" runat="server"
           BorderColor="black"
           BorderWidth="1"
           CellPadding="3"
           ShowFooter="true">

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

         <FooterStyle BackColor="#00aaaa">
         </FooterStyle>
   
      </asp:DataGrid>

   </form>
 
</body>
</html>

Remarques

Utilisez la OnItemCreated méthode pour fournir un gestionnaire personnalisé pour l’événement ItemCreated .

L’événement ItemCreated est déclenché lorsqu’un élément du contrôle est créé, à la DataGrid fois pendant les allers-retours et au moment où les données sont liées au contrôle.

L’événement ItemCreated est couramment utilisé pour contrôler le contenu et l’apparence d’une ligne dans le DataGrid contrôle.

Le déclenchement d'un événement appelle le gestionnaire des événements par l'intermédiaire d'un délégué. Pour plus d’informations, consultez gestion et déclenchement d’événements.

Notes pour les héritiers

Lors de la OnItemCreated(DataGridItemEventArgs) substitution dans une classe dérivée, veillez à appeler la méthode de la classe de OnItemCreated(DataGridItemEventArgs) base.

Pour plus d’informations sur la façon de gérer les événements, consultez gestion et déclenchement d’événements.

S’applique à

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