แก้ไข

แชร์ผ่าน

ProfileBase.Item[String] Property

  • Reference

Definition

Namespace:
System.Web.Profile
Assembly:
System.Web.dll

Gets or sets a profile property value indexed by the property name.

public:
 virtual property System::Object ^ default[System::String ^] { System::Object ^ get(System::String ^ propertyName); void set(System::String ^ propertyName, System::Object ^ value); };
public override object this[string propertyName] { get; set; }
member this.Item(string) : obj with get, set
Default Public Overrides Property Item(propertyName As String) As Object

Parameters

propertyName
String

The name of the profile property.

Property Value

Object

The value of the specified profile property, typed as object.

Exceptions

ProviderException

An attempt was made to set a property value on an anonymous profile where the property's allowAnonymous attribute is false.

SettingsPropertyNotFoundException

There are no properties defined for the current profile.

-or-

The specified profile property name does not exist in the current profile.

-or-

The provider for the specified profile property did not recognize the specified property.

SettingsPropertyIsReadOnlyException

An attempt was made to set a property value that was marked as read-only.

SettingsPropertyWrongTypeException

An attempt was made to assign a value to a property using an incompatible type.

Examples

The following code example lists the names of the properties in the user profile by binding the Name property from the static Properties collection of SettingsProperty objects to a GridView control. The selected property value is retrieved by name using the Item[] collection. For an example of a Web.config file that specifies properties for the user profile, see the example provided for the ProfileBase class.

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Profile" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

public void Page_Load()
{
  if (!IsPostBack)
  {
    PropertiesListBox.DataSource = ProfileBase.Properties;
    PropertiesListBox.DataBind();
  }

  if (PropertiesListBox.SelectedItem != null)
  {
    object propValue = Profile[PropertiesListBox.SelectedItem.Text];

    Type propType = propValue.GetType();

    // If the property is a value type, return ToString().

    if (propType == typeof(string) || propType.IsValueType)
    {
      ValueLabel.Visible = true;
      ValueGridView.Visible = false;
      ValueLabel.Text = propValue.ToString();
      return;
    }


    // Bind the property to a GridView.

    try
    {
      ValueGridView.DataSource = propValue;
      ValueGridView.DataBind();
      ValueGridView.Visible = true;
      ValueLabel.Visible = false; 
    }
    catch
    {
      // If the property is not bindable, return ToString().

      ValueLabel.Visible = true;
      ValueGridView.Visible = false;
      ValueLabel.Text = propValue.ToString();
    }
  }
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Home Page</title>
</head>
<body>

<h3>View Profile properties:</h3>

<form id="form1" runat="server">
  <table border="0" cellpadding="2" cellspacing="2">
    <tr>
      <td>Property</td>
      <td>Value</td>
    </tr>
    <tr>
      <td valign="top">
        <asp:ListBox runat="server" id="PropertiesListBox" Rows="10" AutoPostBack="True" DataTextField="Name" />
      </td>
      <td valign="top">
        <asp:GridView runat="Server" id="ValueGridView" Visible="False" />
        <asp:Label runat="Server" id="ValueLabel" Visible="False" />
      </td>
    </tr>
  </table>
</form>

</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Profile" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

Public Sub Page_Load()

  If Not IsPostBack Then
    PropertiesListBox.DataSource = ProfileBase.Properties
    PropertiesListBox.DataBind()
  End If

  If Not PropertiesListBox.SelectedItem Is Nothing Then
    Dim propValue As Object = Profile(PropertiesListBox.SelectedItem.Text)

    Dim propType As Type = propValue.GetType()

    ' If the property is a value type, return ToString().

    If propType Is GetType(String) Or propType.IsValueType Then
      ValueLabel.Visible = True
      ValueGridView.Visible = False
      ValueLabel.Text = propValue.ToString()
      Return
    End If


    ' Bind the property to a GridView.

    Try
      ValueGridView.DataSource = propValue
      ValueGridView.DataBind()
      ValueGridView.Visible = True
      ValueLabel.Visible = False 
    Catch
      ' If the property is not bindable, return ToString().

      ValueLabel.Visible = True
      ValueGridView.Visible = False
      ValueLabel.Text = propValue.ToString()
    End Try
  End If
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Home Page</title>
</head>
<body>

<h3>View Profile properties:</h3>

<form id="form1" runat="server">
  <table border="0" cellpadding="2" cellspacing="2">
    <tr>
      <td>Property</td>
      <td>Value</td>
    </tr>
    <tr>
      <td valign="top">
        <asp:ListBox runat="server" id="PropertiesListBox" Rows="10" AutoPostBack="True" DataTextField="Name" />
      </td>
      <td valign="top">
        <asp:GridView runat="Server" id="ValueGridView" Visible="False" />
        <asp:Label runat="Server" id="ValueLabel" Visible="False" />
      </td>
    </tr>
  </table>
</form>

</body>
</html>

Remarks

You can use this property to retrieve or set the property values of the user profile for your application by name. Returned values are typed as object and must be cast as the specific object type when retrieved. For strongly typed access to profile property values, you can access the property by name as a member of the Profile property available on each page, for example, Profile.CustomerAddress.

Applies to

See also