// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
-#if NET_2_0
using System.Collections;
using System.Collections.Specialized;
using System.Text;
namespace System.Web.UI.WebControls {
[DefaultPropertyAttribute ("DefaultValue")]
- public class Parameter : ICloneable, IStateManager {
-
+ public class Parameter : ICloneable, IStateManager
+ {
public Parameter () : base ()
{
}
protected Parameter (Parameter original)
{
+ if (original == null)
+ throw new NullReferenceException (".NET emulation");
+
this.DefaultValue = original.DefaultValue;
this.Direction = original.Direction;
this.ConvertEmptyStringToNull = original.ConvertEmptyStringToNull;
{
this.DefaultValue = defaultValue;
}
+
+ public Parameter (string name, DbType dbType) : this (name)
+ {
+ this.DbType = dbType;
+ }
+
+ public Parameter (string name, DbType dbType, string defaultValue) : this (name, dbType)
+ {
+ this.DefaultValue = defaultValue;
+ }
+
+ public static TypeCode ConvertDbTypeToTypeCode (DbType dbType)
+ {
+ switch (dbType) {
+ case DbType.AnsiString:
+ case DbType.AnsiStringFixedLength:
+ case DbType.StringFixedLength:
+ case DbType.String:
+ return TypeCode.String;
+
+ case DbType.Binary:
+ case DbType.Guid:
+ case DbType.Object:
+ case DbType.Xml:
+ case DbType.DateTimeOffset:
+ return TypeCode.Object;
+
+ case DbType.Byte:
+ return TypeCode.Byte;
+
+ case DbType.Boolean:
+ return TypeCode.Boolean;
+
+ case DbType.Currency:
+ case DbType.Decimal:
+ case DbType.VarNumeric:
+ return TypeCode.Decimal;
+
+ case DbType.Date:
+ case DbType.DateTime:
+ case DbType.DateTime2:
+ case DbType.Time:
+ return TypeCode.DateTime;
+
+ case DbType.Double:
+ return TypeCode.Double;
+
+ case DbType.Int16:
+ return TypeCode.Int16;
+
+ case DbType.Int32:
+ return TypeCode.Int32;
+
+ case DbType.Int64:
+ return TypeCode.Int64;
+
+ case DbType.SByte:
+ return TypeCode.SByte;
+
+ case DbType.Single:
+ return TypeCode.Single;
+
+ case DbType.UInt16:
+ return TypeCode.UInt16;
+
+ case DbType.UInt32:
+ return TypeCode.UInt32;
+
+ case DbType.UInt64:
+ return TypeCode.UInt64;
+
+ default:
+ return TypeCode.Object;
+ }
+ }
+
+ public static DbType ConvertTypeCodeToDbType (TypeCode typeCode)
+ {
+ switch (typeCode) {
+ case TypeCode.Empty:
+ case TypeCode.Object:
+ case TypeCode.DBNull:
+ return DbType.Object;
+
+ case TypeCode.Boolean:
+ return DbType.Boolean;
+
+ case TypeCode.Char:
+ return DbType.StringFixedLength;
+
+ case TypeCode.SByte:
+ return DbType.SByte;
+
+ case TypeCode.Byte:
+ return DbType.Byte;
+
+ case TypeCode.Int16:
+ return DbType.Int16;
+
+ case TypeCode.UInt16:
+ return DbType.UInt16;
+
+ case TypeCode.Int32:
+ return DbType.Int32;
+
+ case TypeCode.UInt32:
+ return DbType.UInt32;
+
+ case TypeCode.Int64:
+ return DbType.Int64;
+
+ case TypeCode.UInt64:
+ return DbType.UInt64;
+
+ case TypeCode.Single:
+ return DbType.Single;
+
+ case TypeCode.Double:
+ return DbType.Double;
+
+ case TypeCode.Decimal:
+ return DbType.Decimal;
+
+ case TypeCode.DateTime:
+ return DbType.DateTime;
+
+ case TypeCode.String:
+ return DbType.String;
+
+ default:
+ return DbType.Object;
+ }
+ }
+
+ public DbType GetDatabaseType ()
+ {
+ DbType dt = this.DbType;
+
+ if (dt != DbType.Object)
+ throw new InvalidOperationException ("The DbType property is already set to a value other than DbType.Object.");
+
+ return ConvertTypeCodeToDbType (this.Type);
+ }
protected virtual Parameter Clone ()
{
get { return this.IsTrackingViewState; }
}
+ // MSDN: The ToString method returns the Name property of the Parameter object. If the Parameter object has no name, ToString returns String.Empty.
public override string ToString ()
{
- object o = GetValue (HttpContext.Current, null);
- if (o != null) return o.ToString();
- return "";
+ return Name;
}
[WebCategoryAttribute ("Parameter")]
if (s != null)
return s;
- return "";
+ return String.Empty;
}
set {
}
}
+ [WebCategoryAttribute ("Parameter")]
+ [DefaultValueAttribute (DbType.Object)]
+ [WebSysDescriptionAttribute ("Parameter's DbType.")]
+ public DbType DbType
+ {
+ get {
+ object o = ViewState ["DbType"];
+ if (o == null)
+ return DbType.Object;
+ return (DbType) o;
+ }
+ set {
+ if (DbType != value) {
+ ViewState ["DbType"] = value;
+ OnParameterChanged ();
+ }
+ }
+ }
+
[DefaultValue (0)]
public int Size {
get { return ViewState.GetInt ("Size", 0); }
[DefaultValueAttribute (TypeCode.Empty)]
[WebCategoryAttribute ("Parameter"),
WebSysDescriptionAttribute("Represents type of the parameter.")]
- public TypeCode Type
- {
+ public TypeCode Type {
get { return (TypeCode) ViewState.GetInt ("Type", (int)TypeCode.Empty); }
set {
get { return isTrackingViewState; }
}
- protected virtual object Evaluate (HttpContext context, Control control)
+ // MSDN: The default implementation of the Evaluate method is to return
+ // a null reference (Nothing in Visual Basic) in all cases.
+ // Classes that derive from the Parameter class override the Evaluate method
+ // to return an updated parameter value. For example, the ControlParameter object
+ // returns the value of the control that it is bound to, while
+ // the QueryStringParameter object retrieves the current name/value pair from
+ // the HttpRequest object.
+ protected internal
+ virtual object Evaluate (HttpContext context, Control control)
{
- return this.DefaultValue;
+ return null;
}
-
- internal object GetValue (HttpContext context, Control control)
+
+ internal void UpdateValue (HttpContext context, Control control)
{
object oldValue = ViewState ["ParameterValue"];
-
- object newValue = ConvertValue (Evaluate (context, control));
- if (newValue == null)
- newValue = ConvertValue (DefaultValue);
+
+ object newValue = Evaluate (context, control);
if (!object.Equals (oldValue, newValue)) {
ViewState ["ParameterValue"] = newValue;
OnParameterChanged ();
}
- return newValue;
+ }
+
+ internal object GetValue (HttpContext context, Control control)
+ {
+ UpdateValue (context, control);
+
+ object value = ConvertValue (ViewState ["ParameterValue"]);
+ if (value == null)
+ value = ConvertValue (DefaultValue);
+
+ return value;
}
- object ConvertValue (object val)
+ internal object ConvertValue (object val)
{
if (val == null) return null;
if (ConvertEmptyStringToNull && val.Equals (string.Empty))
return null;
- return Convert.ChangeType (val, Type);
+ return Type != TypeCode.Empty ? Convert.ChangeType (val, Type) : val;
}
protected internal virtual void SetDirty()
ViewState.SetDirty (true);
}
-
- private ParameterCollection _owner;
-
+ ParameterCollection _owner;
internal void SetOwnerCollection (ParameterCollection own)
{
_owner = own;
}
}
}
-#endif
projects / mono.git / blobdiff