QueryParameter.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / AST / QueryParameter.cs / 1305376 / QueryParameter.cs

                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

namespace System.Data.Common.EntitySql.AST 
{
    using System;
    using System.Globalization;
    using System.Collections; 
    using System.Collections.Generic;
 
    ///  
    /// Represents an ast node for a query parameter.
    ///  
    internal sealed class QueryParameter : Node
    {
        private readonly string _name;
 
        /// 
        /// Initializes parameter 
        ///  
        /// 
        /// Thrown if the parameter name does not conform to the expected format 
        /// 
        internal QueryParameter(string parameterName, string query, int inputPos)
            : base(query, inputPos)
        { 
            _name = parameterName.Substring(1);
 
            // 
            // valid parameter format is: @({LETTER})(_|{LETTER}|{DIGIT})*
            // 
            if (_name.StartsWith("_", StringComparison.OrdinalIgnoreCase) || Char.IsDigit(_name, 0))
            {
                throw EntityUtil.EntitySqlError(ErrCtx, System.Data.Entity.Strings.InvalidParameterFormat(_name));
            } 
        }
 
        ///  
        /// Returns parameter parameterName (without @ sign).
        ///  
        internal string Name
        {
            get { return _name; }
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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