DynamicDataExtensions.FindDataSourceControl(Control) Metodo
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Restituisce l'origine dati associata al controllo dati per il controllo specificato.
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
Parametri
- current
- Control
Controllo nella gerarchia di un controllo con associazione a dati di cui si desidera trovare il controllo contenitore.
Restituisce
Origine dati associata al controllo dati per il controllo specificato.
Esempio
Nell'esempio seguente viene illustrato come trovare il controllo origine dati contenente. Nell'esempio i modelli di pagina Dati dinamici vengono copiati nella cartella \DynamicData\CustomPages\ProductDescriptions per fornire una visualizzazione personalizzata per la tabella ProductDescription del database AdventureWorksLT. Il markup del file Insert.aspx viene modificato per aggiungere un OnDataBound
gestore eventi denominato DetailsView1_DataBound
, in cui viene chiamato il metodo per trovare il FindDataSourceControl controllo origine dati.
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>