AccessDataSource Construtores

  • Referência

Definição

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Inicializa uma nova instância da classe AccessDataSource.

Sobrecargas

AccessDataSource()

Inicializa uma nova instância da classe AccessDataSource.
AccessDataSource(String, String)

Inicializa uma nova instância da classe AccessDataSource com o caminho do arquivo de dados especificado e o comando Select.

AccessDataSource()

Inicializa uma nova instância da classe AccessDataSource.

public:
 AccessDataSource();
public AccessDataSource ();
Public Sub New ()

Exemplos

O exemplo de código a seguir demonstra como usar o AccessDataSource construtor para criar um novo AccessDataSource controle de fonte de dados e associar um CheckBoxList controle aos dados em um banco de dados do Microsoft Access.

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
private void Page_Load(Object sender, EventArgs e) {

  // Create the AccessDataSource.
  AccessDataSource accessDS = new AccessDataSource();
  accessDS.SelectCommand = "SELECT SupplierID, CompanyName " +
                           " FROM Suppliers WHERE Country ='Germany'";
  accessDS.DataFile = "~/App_Data/Northwind.mdb";

  // Add the AccessDataSource to the Page.Controls collection.
  Page.Controls.Add(accessDS);

  // In programmatic scenarios, use the DataSource
  // property, not the DataSourceID property. The Select method
  // returns an IEnumerable list of data items.
  CheckBoxList1.DataSource = accessDS;

  // Explicitly call DataBind.
  CheckBoxList1.DataBind();
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:CheckBoxList
        id="CheckBoxList1"
        runat="server"
        DataTextField="CompanyName"
        DataValueField="SupplierID">
      </asp:CheckBoxList>

    </form>
  </body>
</html>

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

  ' Create the AccessDataSource.
  Dim accessDS As New AccessDataSource()
  accessDS.SelectCommand = "SELECT SupplierID, CompanyName " & _
                           " FROM Suppliers WHERE Country ='Germany'"
  accessDS.DataFile = "~/App_Data/Northwind.mdb"

  ' Add the AccessDataSource to the Page.Controls collection.
  Page.Controls.Add(accessDS)

  ' In programmatic scenarios, use the DataSource
  ' property, not the DataSourceID property. The Select method
  ' returns an IEnumerable list of data items.
  CheckBoxList1.DataSource = accessDS

  ' Explicitly call DataBind.
  CheckBoxList1.DataBind()

End Sub 'Page_Load
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:CheckBoxList
        id="CheckBoxList1"
        runat="server"
        DataTextField="CompanyName"
        DataValueField="SupplierID">
      </asp:CheckBoxList>

    </form>
  </body>
</html>

Confira também

Aplica-se a

AccessDataSource(String, String)

Inicializa uma nova instância da classe AccessDataSource com o caminho do arquivo de dados especificado e o comando Select.

public:
 AccessDataSource(System::String ^ dataFile, System::String ^ selectCommand);
public AccessDataSource (string dataFile, string selectCommand);
new System.Web.UI.WebControls.AccessDataSource : string * string -> System.Web.UI.WebControls.AccessDataSource
Public Sub New (dataFile As String, selectCommand As String)

Parâmetros

dataFile
String

O local do arquivo .mdb do Access. O local pode ser relativo à pasta do formulário da Web atual, um caminho físico absoluto ou um caminho virtual.

selectCommand
String

A consulta SQL usada para recuperar dados do banco de dados do Access. Se a consulta SQL for uma cadeia de caracteres SQL parametrizada, adicione objetos Parameter à coleção SelectParameters.

Exceções

ArgumentNullException

dataFile é null ou é uma cadeia de caracteres vazia.

Exemplos

O exemplo de código a seguir demonstra como usar o AccessDataSource construtor para criar um novo AccessDataSource controle de fonte de dados e associar um CheckBoxList controle aos dados em um banco de dados do Microsoft Access.

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
private void Page_Load(Object sender, EventArgs e) {

  // Create AccessDataSource
  AccessDataSource accessDS =
    new AccessDataSource("~/App_Data/Northwind.mdb",
                         "SELECT SupplierID, CompanyName " +
                         " FROM Suppliers WHERE Country ='Germany'");

  // Add the AccessDataSource to the Page.Controls collection
  Page.Controls.Add(accessDS);

  // In programmatic scenarios, use the DataSource
  // property, not the DataSourceID property. The Select method
  // returns an IEnumerable list of data items.
  CheckBoxList1.DataSource = accessDS;

  // Explicitly call DataBind
  CheckBoxList1.DataBind();
}
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:CheckBoxList
        id="CheckBoxList1"
        runat="server"
        DataTextField="CompanyName"
        DataValueField="SupplierID">
      </asp:CheckBoxList>

    </form>
  </body>
</html>

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

  ' Create AccessDataSource
  Dim accessDS As New AccessDataSource("~/App_Data/Northwind.mdb", _
                                       "SELECT SupplierID, CompanyName " & _
                                      " FROM Suppliers WHERE Country ='Germany'")

  ' Add the AccessDataSource to the Page.Controls collection
  Page.Controls.Add(accessDS)

  ' In programmatic scenarios, use the DataSource
  ' property, not the DataSourceID property. The Select method
  ' returns an IEnumerable list of data items.
  CheckBoxList1.DataSource = accessDS

  ' Explicitly call DataBind
  CheckBoxList1.DataBind()

End Sub 'Page_Load
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">

      <asp:CheckBoxList
        id="CheckBoxList1"
        runat="server"
        DataTextField="CompanyName"
        DataValueField="SupplierID">
      </asp:CheckBoxList>

    </form>
  </body>
</html>

Confira também

Aplica-se a