DynamicDataExtensions.FindDataSourceControl(Control) Metoda

Definicja

Zwraca źródło danych skojarzone z kontrolką danych dla określonej kontrolki.Returns the data source that is associated with the data control for the specified control.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Web::DynamicData::IDynamicDataSource ^ FindDataSourceControl(System::Web::UI::Control ^ current);
public static System.Web.DynamicData.IDynamicDataSource FindDataSourceControl (this System.Web.UI.Control current);
static member FindDataSourceControl : System.Web.UI.Control -> System.Web.DynamicData.IDynamicDataSource
<Extension()>
Public Function FindDataSourceControl (current As Control) As IDynamicDataSource

Parametry

current
Control

Kontrolka wewnątrz hierarchii kontrolki powiązanej z danymi, która zawiera kontrolkę, która ma zostać znaleziona.A control inside the hierarchy of a data-bound control whose containing control you want to find.

Zwraca

Źródło danych skojarzone z kontrolką danych dla określonej kontrolki.The data source that is associated with the data control for the specified control.

Przykłady

Poniższy przykład pokazuje, jak znaleźć formant zawierający źródło danych.The following example shows how to find the containing data source control. W tym przykładzie szablony dynamicznej strony danych są kopiowane do folderu \DynamicData\CustomPages\ProductDescriptions w celu zapewnienia niestandardowego wyświetlania tabeli ProductDescription w bazie danych AdventureWorksLT.In the example, the Dynamic Data page templates are copied to the \DynamicData\CustomPages\ProductDescriptions folder to provide a custom display for the ProductDescription table of the AdventureWorksLT database. Znacznik pliku Insert. aspx został zmieniony w celu dodania OnDataBound obsługi zdarzeń o nazwie DetailsView1_DataBound, w której wywoływana jest metoda FindDataSourceControl w celu znalezienia kontroli źródła danych.The Insert.aspx file markup is changed to add an OnDataBound event handler named DetailsView1_DataBound, in which the FindDataSourceControl method is called to find the data source control.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.Web.DynamicData;

public partial class Insert : System.Web.UI.Page {
    protected MetaTable table;

    protected void Page_Init(object sender, EventArgs e) {
        DynamicDataManager1.RegisterControl(DetailsView1);
    }

    protected void Page_Load(object sender, EventArgs e) {
        table = DetailsDataSource.GetTable();
        Title = table.DisplayName;
    }

    protected void DetailsView1_DataBound(object sender, EventArgs e) {

        var dsc = DetailsView1.FindDataSourceControl() as LinqDataSource;
        if (dsc == null || dsc.EnableInsert != true)
            return;

        var mTbl = DetailsView1.FindMetaTable() as MetaTable;
        if (mTbl != null)
            LblMetaTbl.Text = "Column count = " + mTbl.Columns.Count.ToString();

        var fldTmpUsrCtl = DetailsView1.FindFieldTemplate("Description") as FieldTemplateUserControl;
        if (fldTmpUsrCtl != null) {
            var entryFldDescript = fldTmpUsrCtl.DataControl as TextBox;
            entryFldDescript.Text = "(Enter short Description here.)";
        }

        var fldTmpUsrCtl2 = DetailsView1.FindFieldTemplate("ModifiedDate") as FieldTemplateUserControl;
        if (fldTmpUsrCtl2 != null) {
            var entryFldModDate = fldTmpUsrCtl2.DataControl as TextBox;
            entryFldModDate.Text = System.DateTime.Now.Date.ToShortDateString();
        }
    }

    protected void DetailsView1_ItemCommand(object sender, DetailsViewCommandEventArgs e) {
        if (e.CommandName == DataControlCommands.CancelCommandName) {
            Response.Redirect(table.ListActionPath);
        }
    }

    protected void DetailsView1_ItemInserted(object sender, DetailsViewInsertedEventArgs e) {
        if (e.Exception == null) {
            Response.Redirect(table.ListActionPath);
        }
    }
}
<%@ Page Language="C#" MasterPageFile="~/Site.master" CodeFile="Insert.aspx.cs" Inherits="Insert" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <asp:DynamicDataManager ID="DynamicDataManager1" runat="server" AutoLoadForeignKeys="true" />

    <h2> DynamicData\CustomPages\ProductDescriptions\Insert.aspx <%= table.DisplayName %></h2>
    <p>   <asp:Label ID="LblMetaTbl" runat="server" Text="Label"></asp:Label>   </p>

    <asp:ScriptManagerProxy runat="server" ID="ScriptManagerProxy1" />

    <asp:ValidationSummary ID="ValidationSummary1" runat="server" EnableClientScript="true"
        HeaderText="List of validation errors" />
    <asp:DynamicValidator runat="server" ID="DetailsViewValidator" ControlToValidate="DetailsView1" Display="None" />

    <asp:DetailsView ID="DetailsView1" runat="server" DataSourceID="DetailsDataSource" DefaultMode="Insert"
        AutoGenerateInsertButton="True" OnItemCommand="DetailsView1_ItemCommand" OnItemInserted="DetailsView1_ItemInserted"
        CssClass="detailstable" FieldHeaderStyle-CssClass="bold"
        OnDataBound="DetailsView1_DataBound">
    </asp:DetailsView>

    <asp:LinqDataSource ID="DetailsDataSource" runat="server" EnableInsert="true">
    </asp:LinqDataSource>
</asp:Content>

Dotyczy