DetailsView.DataItem Propriété

Définition

Obtient l'élément de données lié au contrôle DetailsView.Gets the data item bound to the DetailsView control.

public:
 virtual property System::Object ^ DataItem { System::Object ^ get(); };
[System.ComponentModel.Browsable(false)]
public virtual object DataItem { get; }
[<System.ComponentModel.Browsable(false)>]
member this.DataItem : obj
Public Overridable ReadOnly Property DataItem As Object

Valeur de propriété

Object

Object qui représente un élément de données lié au contrôle DetailsView.An Object that represents the data item bound to the DetailsView control.

Implémente

Attributs

Exemples

L’exemple de code suivant montre comment utiliser la DataItem propriété pour déterminer la valeur d’un champ dans l’élément de données.The following code example demonstrates how to use the DataItem property to determine the value of a field in the data item.


<%@ Page language="C#" %>
<%@ import namespace="System.Data"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void CustomerDetailView_DataBound(object sender, 
      EventArgs e)
    {
        DataRowView rowView = (DataRowView)CustomerDetailView.DataItem;
        if (rowView.Row[0].ToString() == "SpecialID")
        {
            CustomerDetailView.FieldHeaderStyle.BackColor = 
              System.Drawing.Color.Red;
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanging Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanging Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true" 
          OnDataBound="CustomerDetailView_DataBound"
          allowpaging="true"
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
          InsertCommand="INSERT INTO [Customers]([CustomerID],
            [CompanyName], [Address], [City], [PostalCode], [Country]) 
            VALUES (@CustomerID, @CompanyName, @Address, @City, 
            @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>


<%@ Page language="VB" %>
<%@ import namespace="System.Data"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    Protected Sub CustomerDetailView_DataBound( _
        ByVal sender As Object, ByVal e As EventArgs)
        Dim rowView As DataRowView = _
          CType(CustomerDetailView.DataItem, DataRowView)
        If rowView.Row(0).ToString() = "SpecialID" Then
            CustomerDetailView.FieldHeaderStyle.BackColor = _
              System.Drawing.Color.Red
        End If
    End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsView ModeChanging Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView ModeChanging Example</h3>
                
        <asp:detailsview id="CustomerDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneraterows="true"
          autogenerateeditbutton="true" 
          OnDataBound="CustomerDetailView_DataBound"
          allowpaging="true"
          runat="server">
               
          <fieldheaderstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
          ConnectionString=
            "<%$ ConnectionStrings:NorthWindConnectionString%>"
          InsertCommand="INSERT INTO [Customers]([CustomerID],
            [CompanyName], [Address], [City], [PostalCode], [Country]) 
            VALUES (@CustomerID, @CompanyName, @Address, @City, 
            @PostalCode, @Country)"
          SelectCommand="Select [CustomerID], [CompanyName], 
            [Address], [City], [PostalCode], [Country] From 
            [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

Remarques

Utilisez la DataItem propriété pour accéder à l’élément de données lié au DetailsView contrôle.Use the DataItem property to access the data item bound to the DetailsView control. L’élément de données est souvent utilisé pour accéder directement aux valeurs de champ de l’enregistrement actif.The data item is often used to access the field values of the current record directly. Le type du Object retourné par cette propriété varie en fonction de la source de données.The type of the Object returned by this property varies depending on the data source. Par exemple, lorsqu’un SqlDataSource contrôle est lié au DetailsView contrôle, un DataRowView objet est retourné.For example, when a SqlDataSource control is bound to the DetailsView control, a DataRowView object is returned.

Notes

Cette propriété n’est disponible qu’une fois que la liaison de données s’est produite.This property is available only after data binding has occurred. Avant que la liaison de données ne se produise, cette propriété retourne null .Before data binding occurs, this property returns null. Cette propriété n’est pas non plus applicable lorsque le DetailsView contrôle est en mode insertion et retourne null .This property is also not applicable when the DetailsView control is in insert mode and returns null.

S’applique à

Voir aussi