LinqDataSource.InsertParameters Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.Extensions.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets the collection of parameters that are used during an insert operation.

public:
 property System::Web::UI::WebControls::ParameterCollection ^ InsertParameters { System::Web::UI::WebControls::ParameterCollection ^ get(); };

[System.ComponentModel.Browsable(false)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
public System.Web.UI.WebControls.ParameterCollection InsertParameters { get; }

[<System.ComponentModel.Browsable(false)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
member this.InsertParameters : System.Web.UI.WebControls.ParameterCollection

Public ReadOnly Property InsertParameters As ParameterCollection

Property Value

ParameterCollection

The parameters that are used during an insert operation.

Attributes: BrowsableAttribute PersistenceModeAttribute

Examples

The following example shows a LinqDataSource control with a parameter that provides a default value in the InsertParameters collection. If the user does not provide a value for the Category property, the default value that is provided by the parameter is saved in the database.

<asp:LinqDataSource 
    ContextTypeName="ExampleDataContext" 
    TableName="Products" 
    EnableUpdate="true"
    EnableInsert="true"
    ID="LinqDataSource1" 
    runat="server">
    <UpdateParameters>
      <asp:Parameter Name="Category" DefaultValue="Miscellaneous" />
    </UpdateParameters>
    <InsertParameters>
      <asp:Parameter Name="Category" DefaultValue="Miscellaneous" />
    </InsertParameters>
</asp:LinqDataSource>
<asp:GridView 
    DataSourceID="LinqDataSource1"
    ID="GridView1" 
    runat="server">
</asp:GridView>

<asp:LinqDataSource 
    ContextTypeName="ExampleDataContext" 
    TableName="Products" 
    EnableUpdate="true"
    EnableInsert="true"
    ID="LinqDataSource1" 
    runat="server">
    <UpdateParameters>
      <asp:Parameter Name="Category" DefaultValue="Miscellaneous" />
    </UpdateParameters>
    <InsertParameters>
      <asp:Parameter Name="Category" DefaultValue="Miscellaneous" />
    </InsertParameters>
</asp:LinqDataSource>
<asp:GridView 
    DataSourceID="LinqDataSource1"
    ID="GridView1" 
    runat="server">
</asp:GridView>

Remarks

Typically the values that are needed for an insert operation are passed to the LinqDataSource control by the data-bound control. You specify insert parameters when you want to provide a default value or define whether to convert empty values to null. You do not have to provide a parameter for every value that will be inserted, only for the values that must be handled when the user does not provide a value.

The values that you provide in the InsertParameters collection are used only for fields that are defined in the data source but that are not bound in the data control. For example, suppose a database table has columns that are named Name, Address, and PostalCode, but a ListView control that is bound to the table is bound only to the Name and Address fields. The values in the InsertParameters collection will be used only for the PostalCode field. They will not be used for the Name and Address field. This is true even if no value is entered for those fields. If the data-bound control autogenerates fields for all fields in the data source, no values from the InsertParameters collection will be used.

Applies to

次の方法で共有