Parameter Constructor (String, TypeCode, String)

 

Initializes a new instance of the Parameter class, using the specified name, the specified type, and the specified string for its DefaultValue property.

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

public Parameter(
	string name,
	TypeCode type,
	string defaultValue
)

Parameters

name
Type: System.String

The name of the parameter.

type
Type: System.TypeCode

A TypeCode that describes the type of the parameter.

defaultValue
Type: System.String

A string that serves as a default value for the parameter, if the Parameter is bound to a value that is not yet initialized when Evaluate is called.

A Parameter object created with the Parameter(String, TypeCode, String) constructor is initialized with the specified name parameter and type parameter, and assigned a DefaultValue property value. The Direction property is initialized to Input.

The following code example demonstrates how to use the Parameter(String, TypeCode, String) constructor to add update parameter objects to the UpdateParameters collection of an AccessDataSource control before calling the Update method.

<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>

.NET Framework
Available since 2.0
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