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//---------------------------------------------------------------------
// <copyright file="WebControlParameterProxy.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner objsdev
//---------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI.WebControls;
using System.Diagnostics;
using System.Data;
using System.Globalization;
namespace System.Web.UI.WebControls
{
internal class WebControlParameterProxy
{
ParameterCollection _collection;
EntityDataSource _entityDataSource;
Parameter _parameter; // Can be null, that's why this class doesn't subclass Parameter
internal WebControlParameterProxy(string propertyName, ParameterCollection parameterCollection, EntityDataSource entityDataSource)
{
Debug.Assert(null != entityDataSource);
Debug.Assert(!String.IsNullOrEmpty(propertyName));
_parameter = EntityDataSourceUtil.GetParameter(propertyName, parameterCollection);
_collection = parameterCollection;
_entityDataSource = entityDataSource;
VerifyUniqueType(_parameter);
}
internal WebControlParameterProxy(Parameter parameter, ParameterCollection parameterCollection, EntityDataSource entityDataSource)
{
Debug.Assert(null != entityDataSource);
_parameter = parameter;
_collection = parameterCollection;
_entityDataSource = entityDataSource;
VerifyUniqueType(_parameter);
}
internal string Name
{
get
{
if (null != _parameter)
{
return _parameter.Name;
}
return null;
}
}
internal bool HasValue
{
get
{
return null != _parameter &&
null != Value;
}
}
internal bool ConvertEmptyStringToNull
{
get
{
if (null != _parameter)
{
return _parameter.ConvertEmptyStringToNull;
}
return false;
}
}
internal TypeCode TypeCode
{
get
{
if (null != _parameter)
{
return _parameter.Type;
}
return TypeCode.Empty;
}
}
internal DbType DbType
{
get
{
if (null != _parameter)
{
return _parameter.DbType;
}
return DbType.Object;
}
}
internal Type ClrType
{
get
{
Debug.Assert(this.TypeCode != TypeCode.Empty || this.DbType != DbType.Object, "Need to have TypeCode or DbType to get a ClrType");
if (this.TypeCode != TypeCode.Empty)
{
return EntityDataSourceUtil.ConvertTypeCodeToType(this.TypeCode);
}
return EntityDataSourceUtil.ConvertDbTypeToType(this.DbType);
}
}
internal object Value
{
get
{
if (_parameter != null)
{
object paramValue = EntityDataSourceUtil.GetParameterValue(_parameter.Name, _collection, _entityDataSource);
if (paramValue != null)
{
if (this.DbType == DbType.DateTimeOffset)
{
object value = (paramValue is DateTimeOffset)
? paramValue
: DateTimeOffset.Parse(this.Value.ToString(), CultureInfo.CurrentCulture);
return value;
}
else if (this.DbType == DbType.Time)
{
object value = (paramValue is TimeSpan)
? paramValue
: TimeSpan.Parse(paramValue.ToString(), CultureInfo.CurrentCulture);
return value;
}
else if (this.DbType == DbType.Guid)
{
object value = (paramValue is Guid)
? paramValue
: new Guid(paramValue.ToString());
return value;
}
}
return paramValue;
}
return null;
}
}
private static void VerifyUniqueType(Parameter parameter)
{
if (parameter != null && parameter.Type == TypeCode.Empty && parameter.DbType == DbType.Object)
{
throw new InvalidOperationException(Strings.WebControlParameterProxy_TypeDbTypeMutuallyExclusive);
}
if (parameter != null && parameter.DbType != DbType.Object && parameter.Type != TypeCode.Empty)
{
throw new InvalidOperationException(Strings.WebControlParameterProxy_TypeDbTypeMutuallyExclusive);
}
}
}
}
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