SQLBytesStorage.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Data / System / Data / Common / SQLTypes / SQLBytesStorage.cs / 1 / SQLBytesStorage.cs
                        

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

namespace System.Data.Common { 
    using System;
    using System.Collections;
    using System.Data.SqlClient;
    using System.Data.SqlTypes; 
    using System.Diagnostics;
    using System.Globalization; 
    using System.IO; 
    using System.Xml;
    using System.Xml.Serialization; 

    internal sealed class SqlBytesStorage : DataStorage {

        private SqlBytes[] values; 

        public SqlBytesStorage(DataColumn column) 
        : base(column, typeof(SqlBytes), SqlBytes.Null, SqlBytes.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(SqlBytes));
            }
            throw ExceptionBuilder.AggregateException(kind, DataType); 
        }
 
        override public int Compare(int recordNo1, int recordNo2) { 
            return 0;
        } 

        override public int CompareValueTo(int recordNo, Object value) {
            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] = SqlBytes.Null;
            }
            else { 
                values[record] = (SqlBytes)value;
            } 
        } 

        override public void SetCapacity(int capacity) { 
            SqlBytes[] newValues = new SqlBytes[capacity];
            if (null != values) {
                Array.Copy(values, 0, newValues, 0, Math.Min(capacity, values.Length));
            } 
            values = newValues;
        } 
 
        override public object ConvertXmlToObject(string s) {
            SqlBinary newValue = new SqlBinary(); 
            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 SqlBytes((SqlBinary)tmp)); 
        }

        override public string ConvertObjectToXml(object value) {
            Debug.Assert(!DataStorage.IsObjectNull(value), "we shouldn't have null here"); 
            Debug.Assert((value.GetType() == typeof(SqlBytes)), "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 SqlBytes[recordCount]; 
        }
 
        override protected void CopyValue(int record, object store, BitArray nullbits, int storeIndex) {
            SqlBytes[] typedStore = (SqlBytes[]) store;
            typedStore[storeIndex] = values[record];
            nullbits.Set(storeIndex, IsNull(record)); 
        }
 
        override protected void SetStorage(object store, BitArray nullbits) { 
            values = (SqlBytes[]) store;
            //SetNullStorage(nullbits); 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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