WebControlParameterProxy.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataWebControls / System / Data / WebControls / WebControlParameterProxy.cs / 1 / WebControlParameterProxy.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @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.ConvertTypeCodeToType(
                    EntityDataSourceUtil.ConvertDbTypeToTypeCode(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()); 
                            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);
            } 
        }

    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @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.ConvertTypeCodeToType(
                    EntityDataSourceUtil.ConvertDbTypeToTypeCode(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()); 
                            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);
            } 
        }

    }
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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WebControlParameterProxy.cs source code in C# .NET

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