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SqlDataSource.ConnectionString Property

Note: This property is new in the .NET Framework version 2.0.

Gets or sets the ADO.NET provider–specific connection string that the SqlDataSource control uses to connect to an underlying database.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public virtual string ConnectionString { get; set; }
/** @property */
public String get_ConnectionString ()

/** @property */
public void set_ConnectionString (String value)

public function get ConnectionString () : String

public function set ConnectionString (value : String)

Property Value

A .NET Framework data provider–specific string that the SqlDataSource uses to connect to the SQL database that it represents. The default is an empty string ("").

The SqlDataSource control can be used with a variety of ADO.NET providers and the syntax of the connection string that is used to connect to an underlying data source is specific to the provider.

If you change the ConnectionString property, the DataSourceChanged event is raised, causing any controls that are bound to the SqlDataSource control to rebind.

Security noteSecurity Note

For information about storing a connection string, see How To: Secure Connection Strings When Using Data Source Controls.

This section contains two code examples. The first code example demonstrates how to set the ConnectionString property to connect to a Microsoft SQL Server database and display the results of the SelectCommand property in a GridView control. The second code example demonstrates a more complex scenario, where a SqlDataSource control is used to display and update data in a password-protected Microsoft Access database.

The following code example demonstrates how to set the ConnectionString property to connect to a SQL Server database and display the results of the SelectCommand property in a GridView control.

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

<HTML>
  <BODY>
    <FORM runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataReader"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand="SELECT FirstName, LastName, Title FROM Employees">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          DataSourceID="SqlDataSource1">
      </asp:GridView>

    </FORM>
  </BODY>
</HTML>

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

<HTML>
  <BODY>
    <FORM runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataReader"
          ConnectionString="Data Source=localhost;Integrated Security=SSPI;Initial Catalog=Northwind;"
          SelectCommand="SELECT FirstName, LastName, Title FROM Employees">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          DataSourceID="SqlDataSource1">
      </asp:GridView>

    </FORM>
  </BODY>
</HTML>

The following code example demonstrates a more complex scenario than the preceding code example, where a SqlDataSource control is used to display and update data in a password-protected Access database. Because the SqlDataSource is used with Access, the ProviderName property is set to the System.Data.OleDb provider, and the ConnectionString property is set to an appropriate connection string for a UNC-shared Access database. A GridView control displays orders with shipment dates. You can update an order by checking the appropriate check box, and then clicking the Update button.

<%@Page  Language="C#" %>
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.Common" %>
<!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 UpdateRecords(Object source, EventArgs e)
{
  // This method is an example of batch updating using a
  // data source control. The method iterates through the rows
  // of the GridView, extracts each CheckBox from the row and, if
  // the CheckBox is checked, updates data by calling the Update
  // method of the data source control, adding required parameters
  // to the UpdateParameters collection.
  CheckBox cb;
  foreach(GridViewRow row in this.GridView1.Rows) {
    cb = (CheckBox) row.Cells[0].Controls[1];
    if(cb.Checked) {
      string oid = (string) row.Cells[1].Text;
      MyAccessDataSource.UpdateParameters.Add(new Parameter("date",TypeCode.DateTime,DateTime.Now.ToString()));
      MyAccessDataSource.UpdateParameters.Add(new Parameter("orderid",TypeCode.String,oid));
      MyAccessDataSource.Update();
      MyAccessDataSource.UpdateParameters.Clear();
    }
  }
}
</SCRIPT>

<HTML>
  <BODY>
    <FORM runat="server">

<!-- Security Note: The SqlDataSource uses a QueryStringParameter,
     Security Note: which does not perform validation of input from the client.
     Security Note: To validate the value of the QueryStringParameter, handle the Selecting event. -->

      <asp:SqlDataSource
        id="MyAccessDataSource"
        runat="server"
        ProviderName="<%$ ConnectionStrings:MyPasswordProtectedAccess.providerName%>"
        ConnectionString="<%$ ConnectionStrings:MyPasswordProtectedAccess%>"
        SelectCommand="SELECT OrderID, OrderDate, RequiredDate, ShippedDate FROM Orders WHERE EmployeeID=?"
        UpdateCommand="UPDATE Orders SET ShippedDate=? WHERE OrderID = ?">
        <SelectParameters>
          <asp:QueryStringParameter Name="empId" QueryStringField="empId" />
        </SelectParameters>
      </asp:SqlDataSource>

      <asp:GridView
        id ="GridView1"
        runat="server"
        DataSourceID="MyAccessDataSource"
        AllowPaging="True"
        PageSize="10"
        AutoGenerateColumns="False">
          <columns>
            <asp:TemplateField HeaderText="">
              <ItemTemplate>
                <asp:CheckBox runat="server" />
              </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField HeaderText="Order" DataField="OrderID" />
            <asp:BoundField HeaderText="Order Date" DataField="OrderDate" />
            <asp:BoundField HeaderText="Required Date" DataField="RequiredDate" />
            <asp:BoundField HeaderText="Shipped Date" DataField="ShippedDate" />
          </columns>
      </asp:GridView>

      <asp:Button
        id="Button1"
        runat="server"
        Text="Update the Selected Records As Shipped"
        OnClick="UpdateRecords" />

      <asp:Label id="Label1" runat="server" />

    </FORM>
  </BODY>
</HTML>

<%@Page  Language="VJ#" %>
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.Common" %>
<!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 UpdateRecords(Object source, System.EventArgs e)
    {
        // This method is an example of batch updating using a
        // data source control. The method iterates through the rows
        // of the GridView, extracts each CheckBox from the row and, if
        // the CheckBox is checked, updates data by calling the Update
        // method of the data source control, adding required parameters
        // to the UpdateParameters collection.
        CheckBox cb;
        for (int iCtr = 0; 
                iCtr < this.GridView1.get_Rows().get_Count(); iCtr++) {
            GridViewRow row = this.GridView1.get_Rows().get_Item(iCtr);
            cb = (CheckBox)row.get_Cells().get_Item(0).get_Controls().get_Item(1);
            if (cb.get_Checked()) {
                String oid = (String)(row.get_Cells().get_Item(1).get_Text());
                MyAccessDataSource.get_UpdateParameters().Add(new Parameter(
                    "date", System.TypeCode.DateTime, System.DateTime.get_Now().ToString()));
                MyAccessDataSource.get_UpdateParameters().Add(new Parameter(
                    "orderid", System.TypeCode.String, oid));
                MyAccessDataSource.Update();
                MyAccessDataSource.get_UpdateParameters().Clear();
            }
        }
    } //UpdateRecords
</SCRIPT>

<HTML>
  <BODY>
    <FORM runat="server">
<!-- Security Note: The SqlDataSource uses a QueryStringParameter,
     Security Note: which does not perform validation of input from the client.
     Security Note: To validate the value of the QueryStringParameter, handle the Selecting event. -->

      <asp:SqlDataSource
        id="MyAccessDataSource"
        runat="server"
        ProviderName="System.Data.OleDb"
        ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\\uncpath\Northwind_PasswordProtected.mdb;Mode=3;Jet OLEDB:Database Password=myPassword;"
        SelectCommand="SELECT OrderID, OrderDate, RequiredDate, ShippedDate FROM Orders WHERE EmployeeID=?"
        UpdateCommand="UPDATE Orders SET ShippedDate=? WHERE OrderID = ?">
        <SelectParameters>
          <asp:QueryStringParameter Name="empId" QueryStringField="empId" />
        </SelectParameters>
      </asp:SqlDataSource>
      <asp:GridView
        id ="GridView1"
        runat="server"
        DataSourceID="MyAccessDataSource"
        AllowPaging="True"
        PageSize="10"
        AutoGenerateColumns="False">
          <Columns>
            <asp:TemplateField HeaderText="">
              <ItemTemplate>
                <asp:CheckBox runat="server" />
              </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField HeaderText="Order" DataField="OrderID" />
            <asp:BoundField HeaderText="Order Date" DataField="OrderDate" />
            <asp:BoundField HeaderText="Required Date" DataField="RequiredDate" />
            <asp:BoundField HeaderText="Shipped Date" DataField="ShippedDate" />
          </Columns>
      </asp:GridView>

      <asp:Button
        id="Button1"
        runat="server"
        Text="Update the Selected Records As Shipped"
        OnClick="UpdateRecords" />

      <asp:Label id="Label1" runat="server" />

    </FORM>
  </BODY>
</HTML>

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0
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