SQLCharsStorage.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 / Data / System / Data / Common / SQLTypes / SQLCharsStorage.cs / 1305376 / SQLCharsStorage.cs
                        

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

namespace System.Data.Common { 
    using System;
    using System.Xml;
    using System.IO;
    using System.Xml.Serialization; 
    using System.Data.SqlTypes;
    using System.Diagnostics; 
    using System.Globalization; 
    using System.Collections;
 
    internal sealed class SqlCharsStorage : DataStorage {

        private SqlChars[] values;
 
        public SqlCharsStorage(DataColumn column)
        : base(column, typeof(SqlChars), SqlChars.Null, SqlChars.Null) { 
        } 

        override public Object Aggregate(int[] records, AggregateType kind) { 
            try {
                switch (kind) {
                    case AggregateType.First:
                        if (records.Length > 0) { 
                            return values[records[0]];
                        } 
                        return null;// no data => null 

                    case AggregateType.Count: 
                        int count = 0;
                        for (int i = 0; i < records.Length; i++) {
                            if (!IsNull(records[i]))
                                count++; 
                        }
                        return count; 
                } 
            }
            catch (OverflowException) { 
                throw ExprException.Overflow(typeof(SqlChars));
            }
            throw ExceptionBuilder.AggregateException(kind, DataType);
        } 

        override public int Compare(int recordNo1, int recordNo2) { 
//            throw ExceptionBuilder.IComparableNotDefined; 
            return 0;
        } 

        override public int CompareValueTo(int recordNo, Object value) {
//            throw ExceptionBuilder.IComparableNotDefined;
            return 0; 
        }
 
        override public void Copy(int recordNo1, int recordNo2) { 
            values[recordNo2] = values[recordNo1];
        } 

        override public Object Get(int record) {
            return values[record];
        } 

        override public bool IsNull(int record) { 
            return (values[record].IsNull); 
        }
 
        override public void Set(int record, Object value) {
            if ((value ==  DBNull.Value) || (value == null)){
                values[record] = SqlChars.Null;
            } 
            else {
                values[record] = (SqlChars)value; 
            } 
        }
 
        override public void SetCapacity(int capacity) {
            SqlChars[] newValues = new SqlChars[capacity];
            if (null != values) {
                Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length)); 
            }
            values = newValues; 
        } 

        override public object ConvertXmlToObject(string s) { 
            SqlString newValue = new SqlString();

            string tempStr =string.Concat("", s, ""); // this is done since you can give fragmet to reader, bug 98767
            StringReader strReader = new  StringReader(tempStr); 

            IXmlSerializable tmp = newValue; 
 
            using (XmlTextReader xmlTextReader = new XmlTextReader(strReader)) {
                tmp.ReadXml(xmlTextReader); 
            }
            return (new SqlChars((SqlString)tmp));
        }
 
        override public string ConvertObjectToXml(object value) {
            Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); 
            Debug.Assert((value.GetType() == typeof(SqlChars)), "wrong input type"); 

            StringWriter strwriter = new StringWriter(FormatProvider); 

            using (XmlTextWriter xmlTextWriter = new XmlTextWriter (strwriter)) {
                ((IXmlSerializable)value).WriteXml(xmlTextWriter);
            } 
            return (strwriter.ToString ());
        } 
 
        override protected object GetEmptyStorage(int recordCount) {
            return new SqlChars[recordCount]; 
        }

        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
            SqlChars[] typedStore = (SqlChars[]) store; 
            typedStore[storeIndex] = values[record];
            nullbits.Set(storeIndex, IsNull(record)); 
        } 

        override protected void SetStorage(object store, BitArray nullbits) { 
            values = (SqlChars[]) store;
            //SetNullStorage(nullbits);
        }
    } 
}

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

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