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//------------------------------------------------------------------------------
// <copyright file="OleDbConnectionStringBuilder.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.Common;
using System.Diagnostics;
using System.Globalization;
using System.Runtime.Serialization;
using System.Security.Permissions;
using System.Text;
namespace System.Data.OleDb {
[DefaultProperty("Provider")]
[RefreshPropertiesAttribute(RefreshProperties.All)]
[System.ComponentModel.TypeConverterAttribute(typeof(OleDbConnectionStringBuilder.OleDbConnectionStringBuilderConverter))]
public sealed class OleDbConnectionStringBuilder : DbConnectionStringBuilder {
private enum Keywords { // specific ordering for ConnectionString output construction
// NamedConnection,
FileName,
Provider,
DataSource,
PersistSecurityInfo,
OleDbServices,
}
private static readonly string[] _validKeywords;
private static readonly Dictionary<string,Keywords> _keywords;
private string[] _knownKeywords;
private Dictionary<string,OleDbPropertyInfo> _propertyInfo;
// private string _namedConnection = DbConnectionStringDefaults.NamedConnection;
private string _fileName = DbConnectionStringDefaults.FileName;
private string _dataSource = DbConnectionStringDefaults.DataSource;
private string _provider = DbConnectionStringDefaults.Provider;
private int _oleDbServices = DbConnectionStringDefaults.OleDbServices;
private bool _persistSecurityInfo = DbConnectionStringDefaults.PersistSecurityInfo;
static OleDbConnectionStringBuilder() {
string[] validKeywords = new string[5];
validKeywords[(int)Keywords.DataSource] = DbConnectionStringKeywords.DataSource;
validKeywords[(int)Keywords.FileName] = DbConnectionStringKeywords.FileName;
// validKeywords[(int)Keywords.NamedConnection] = DbConnectionStringKeywords.NamedConnection;
validKeywords[(int)Keywords.OleDbServices] = DbConnectionStringKeywords.OleDbServices;
validKeywords[(int)Keywords.PersistSecurityInfo] = DbConnectionStringKeywords.PersistSecurityInfo;
validKeywords[(int)Keywords.Provider] = DbConnectionStringKeywords.Provider;
_validKeywords = validKeywords;
Dictionary<string,Keywords> hash = new Dictionary<string,Keywords>(9, StringComparer.OrdinalIgnoreCase);
hash.Add(DbConnectionStringKeywords.DataSource, Keywords.DataSource);
hash.Add(DbConnectionStringKeywords.FileName, Keywords.FileName);
// hash.Add(DbConnectionStringKeywords.NamedConnection, Keywords.NamedConnection);
hash.Add(DbConnectionStringKeywords.OleDbServices, Keywords.OleDbServices);
hash.Add(DbConnectionStringKeywords.PersistSecurityInfo, Keywords.PersistSecurityInfo);
hash.Add(DbConnectionStringKeywords.Provider, Keywords.Provider);
Debug.Assert(5 == hash.Count, "initial expected size is incorrect");
_keywords = hash;
}
public OleDbConnectionStringBuilder() : this(null) {
_knownKeywords = _validKeywords;
}
public OleDbConnectionStringBuilder(string connectionString) : base() {
if (!ADP.IsEmpty(connectionString)) {
ConnectionString = connectionString;
}
}
public override object this[string keyword] {
get {
ADP.CheckArgumentNull(keyword, "keyword");
object value;
Keywords index;
if (_keywords.TryGetValue(keyword, out index)) {
value = GetAt(index);
}
else if (!base.TryGetValue(keyword, out value)) {
Dictionary<string,OleDbPropertyInfo> dynamic = GetProviderInfo(Provider);
OleDbPropertyInfo info = dynamic[keyword];
value = info._defaultValue;
}
return value;
}
set {
if (null != value) {
ADP.CheckArgumentNull(keyword, "keyword");
Keywords index;
if (_keywords.TryGetValue(keyword, out index)) {
switch(index) {
case Keywords.DataSource: DataSource = ConvertToString(value); break;
case Keywords.FileName: FileName = ConvertToString(value); break;
// case Keywords.NamedConnection: NamedConnection = ConvertToString(value); break;
case Keywords.Provider: Provider = ConvertToString(value); break;
case Keywords.OleDbServices: OleDbServices = ConvertToInt32(value); break;
case Keywords.PersistSecurityInfo: PersistSecurityInfo = ConvertToBoolean(value); break;
default:
Debug.Assert(false, "unexpected keyword");
throw ADP.KeywordNotSupported(keyword);
}
}
else {
base[keyword] = value;
ClearPropertyDescriptors();
}
}
else {
Remove(keyword);
}
}
}
[DisplayName(DbConnectionStringKeywords.DataSource)]
[ResCategoryAttribute(Res.DataCategory_Source)]
[ResDescriptionAttribute(Res.DbConnectionString_DataSource)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
//
public string DataSource {
get { return _dataSource; }
set {
SetValue(DbConnectionStringKeywords.DataSource, value);
_dataSource = value;
}
}
[DisplayName(DbConnectionStringKeywords.FileName)]
[ResCategoryAttribute(Res.DataCategory_NamedConnectionString)]
[ResDescriptionAttribute(Res.DbConnectionString_FileName)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
//
[Editor("System.Windows.Forms.Design.FileNameEditor, " + AssemblyRef.SystemDesign, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing)]
public string FileName {
get { return _fileName; }
set {
SetValue(DbConnectionStringKeywords.FileName, value);
_fileName = value;
}
}
/*
[DisplayName(DbConnectionStringKeywords.NamedConnection)]
[ResCategoryAttribute(Res.DataCategory_NamedConnectionString)]
[ResDescriptionAttribute(Res.DbConnectionString_NamedConnection)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
[TypeConverter(typeof(NamedConnectionStringConverter))]
public string NamedConnection {
get { return _namedConnection; }
set {
SetValue(DbConnectionStringKeywords.NamedConnection, value);
_namedConnection = value;
}
}
*/
[DisplayName(DbConnectionStringKeywords.OleDbServices)]
[ResCategoryAttribute(Res.DataCategory_Pooling)]
[ResDescriptionAttribute(Res.DbConnectionString_OleDbServices)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
[TypeConverter(typeof(OleDbConnectionStringBuilder.OleDbServicesConverter))]
public int OleDbServices {
get { return _oleDbServices; }
set {
SetValue(DbConnectionStringKeywords.OleDbServices, value);
_oleDbServices = value;
}
}
[DisplayName(DbConnectionStringKeywords.PersistSecurityInfo)]
[ResCategoryAttribute(Res.DataCategory_Security)]
[ResDescriptionAttribute(Res.DbConnectionString_PersistSecurityInfo)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
public bool PersistSecurityInfo {
get { return _persistSecurityInfo; }
set {
SetValue(DbConnectionStringKeywords.PersistSecurityInfo, value);
_persistSecurityInfo = value;
}
}
[DisplayName(DbConnectionStringKeywords.Provider)]
[ResCategoryAttribute(Res.DataCategory_Source)]
[ResDescriptionAttribute(Res.DbConnectionString_Provider)]
[RefreshPropertiesAttribute(RefreshProperties.All)]
[TypeConverter(typeof(OleDbConnectionStringBuilder.OleDbProviderConverter))]
public string Provider {
get { return _provider; }
set {
SetValue(DbConnectionStringKeywords.Provider, value);
_provider = value;
RestartProvider();
}
}
public override ICollection Keys {
get {
string[] knownKeywords = _knownKeywords;
if (null == knownKeywords) {
Dictionary<string,OleDbPropertyInfo> dynamic = GetProviderInfo(Provider);
if (0 < dynamic.Count) {
knownKeywords = new string[_validKeywords.Length + dynamic.Count];
_validKeywords.CopyTo(knownKeywords, 0);
dynamic.Keys.CopyTo(knownKeywords, _validKeywords.Length);
}
else {
knownKeywords = _validKeywords;
}
int count = 0;
foreach(string keyword in base.Keys) {
bool flag = true;
foreach(string s in knownKeywords) {
if (StringComparer.OrdinalIgnoreCase.Equals(s, keyword)) {
flag = false;
break;
}
}
if (flag) {
count++;
}
}
if (0 < count) {
string[] tmp = new string[knownKeywords.Length + count];
knownKeywords.CopyTo(tmp, 0);
int index = knownKeywords.Length;
foreach(string keyword in base.Keys) {
bool flag = true;
foreach(string s in knownKeywords) {
if (StringComparer.OrdinalIgnoreCase.Equals(s, keyword)) {
flag = false;
break;
}
}
if (flag) {
tmp[index++] = keyword;
}
}
knownKeywords = tmp;
}
_knownKeywords = knownKeywords;
}
return new System.Data.Common.ReadOnlyCollection<string>(knownKeywords);
}
}
public override bool ContainsKey(string keyword) {
ADP.CheckArgumentNull(keyword, "keyword");
return _keywords.ContainsKey(keyword) || base.ContainsKey(keyword);
}
private static bool ConvertToBoolean(object value) {
return DbConnectionStringBuilderUtil.ConvertToBoolean(value);
}
private static int ConvertToInt32(object value) {
return DbConnectionStringBuilderUtil.ConvertToInt32(value);
}
private static string ConvertToString(object value) {
return DbConnectionStringBuilderUtil.ConvertToString(value);
}
public override void Clear() {
base.Clear();
for(int i = 0; i < _validKeywords.Length; ++i) {
Reset((Keywords)i);
}
base.ClearPropertyDescriptors();
_knownKeywords = _validKeywords;
}
private object GetAt(Keywords index) {
switch(index) {
case Keywords.DataSource: return DataSource;
case Keywords.FileName: return FileName;
// case Keywords.NamedConnection: return NamedConnection;
case Keywords.OleDbServices: return OleDbServices;
case Keywords.PersistSecurityInfo: return PersistSecurityInfo;
case Keywords.Provider: return Provider;
default:
Debug.Assert(false, "unexpected keyword");
throw ADP.KeywordNotSupported(_validKeywords[(int)index]);
}
}
public override bool Remove(string keyword) {
ADP.CheckArgumentNull(keyword, "keyword");
bool value = base.Remove(keyword);
Keywords index;
if (_keywords.TryGetValue(keyword, out index)) {
Reset(index);
}
else if (value) {
ClearPropertyDescriptors();
}
return value;
}
private void Reset(Keywords index) {
switch(index) {
case Keywords.DataSource:
_dataSource = DbConnectionStringDefaults.DataSource;
break;
case Keywords.FileName:
_fileName = DbConnectionStringDefaults.FileName;
RestartProvider();
break;
// case Keywords.NamedConnection:
// _namedConnection = DbConnectionStringDefaults.NamedConnection;
// break;
case Keywords.OleDbServices:
_oleDbServices = DbConnectionStringDefaults.OleDbServices;
break;
case Keywords.PersistSecurityInfo:
_persistSecurityInfo = DbConnectionStringDefaults.PersistSecurityInfo;
break;
case Keywords.Provider:
_provider = DbConnectionStringDefaults.Provider;
RestartProvider();
break;
default:
Debug.Assert(false, "unexpected keyword");
throw ADP.KeywordNotSupported(_validKeywords[(int)index]);
}
}
private new void ClearPropertyDescriptors() {
base.ClearPropertyDescriptors();
_knownKeywords = null;
}
private void RestartProvider() {
ClearPropertyDescriptors();
_propertyInfo = null;
}
private void SetValue(string keyword, bool value) {
base[keyword] = value.ToString((System.IFormatProvider)null);
}
private void SetValue(string keyword, int value) {
base[keyword] = value.ToString((System.IFormatProvider)null);
}
private void SetValue(string keyword, string value) {
ADP.CheckArgumentNull(value, keyword);
base[keyword] = value;
}
public override bool TryGetValue(string keyword, out object value) {
ADP.CheckArgumentNull(keyword, "keyword");
Keywords index;
if (_keywords.TryGetValue(keyword, out index)) {
value = GetAt(index);
return true;
}
else if (!base.TryGetValue(keyword, out value)) {
Dictionary<string,OleDbPropertyInfo> dynamic = GetProviderInfo(Provider);
OleDbPropertyInfo info;
if (dynamic.TryGetValue(keyword, out info)) {
value = info._defaultValue;
return true;
}
return false;
}
return true;
}
private Dictionary<string,OleDbPropertyInfo> GetProviderInfo(string provider) {
Dictionary<string,OleDbPropertyInfo> providerInfo = _propertyInfo;
if (null == providerInfo) {
providerInfo = new Dictionary<string,OleDbPropertyInfo>(StringComparer.OrdinalIgnoreCase);
if (!ADP.IsEmpty(provider)) {
Dictionary<string,OleDbPropertyInfo> hash = null;
try {
StringBuilder builder = new StringBuilder();
AppendKeyValuePair(builder, DbConnectionStringKeywords.Provider, provider);
OleDbConnectionString constr = new OleDbConnectionString(builder.ToString(), true);
constr.CreatePermissionSet().Demand();
// load provider without calling Initialize or CreateDataSource
using(OleDbConnectionInternal connection = new OleDbConnectionInternal(constr, (OleDbConnection)null)) {
// get all the init property information for the provider
hash = connection.GetPropertyInfo(new Guid[] { OleDbPropertySetGuid.DBInitAll });
foreach(KeyValuePair<string,OleDbPropertyInfo> entry in hash) {
Keywords index;
OleDbPropertyInfo info = entry.Value;
if (!_keywords.TryGetValue(info._description, out index)) {
if ((OleDbPropertySetGuid.DBInit == info._propertySet) &&
((ODB.DBPROP_INIT_ASYNCH == info._propertyID) ||
(ODB.DBPROP_INIT_HWND == info._propertyID) ||
(ODB.DBPROP_INIT_PROMPT == info._propertyID))) {
continue; // skip this keyword
}
providerInfo[info._description] = info;
}
}
// what are the unique propertysets?
List<Guid> listPropertySets= new List<Guid>();
foreach(KeyValuePair<string,OleDbPropertyInfo> entry in hash) {
OleDbPropertyInfo info = entry.Value;
if (!listPropertySets.Contains(info._propertySet)) {
listPropertySets.Add(info._propertySet);
}
}
Guid[] arrayPropertySets = new Guid[listPropertySets.Count];
listPropertySets.CopyTo(arrayPropertySets, 0);
// get all the init property values for the provider
using(PropertyIDSet propidset = new PropertyIDSet(arrayPropertySets)) {
using(IDBPropertiesWrapper idbProperties = connection.IDBProperties()) {
OleDbHResult hr;
using(DBPropSet propset = new DBPropSet(idbProperties.Value, propidset, out hr)) {
// VSDD 671375: OleDbConnectionStringBuilder is ignoring/hiding potential errors of OLEDB provider when reading its properties information
if (0 <= (int)hr) {
int count = propset.PropertySetCount;
for(int i = 0; i < count; ++i) {
Guid propertyset;
tagDBPROP[] props = propset.GetPropertySet(i, out propertyset);
// attach the default property value to the property info
foreach(tagDBPROP prop in props) {
foreach(KeyValuePair<string,OleDbPropertyInfo> entry in hash) {
OleDbPropertyInfo info = entry.Value;
if ((info._propertyID == prop.dwPropertyID) && (info._propertySet == propertyset)) {
info._defaultValue = prop.vValue;
if (null == info._defaultValue) {
if (typeof(string) == info._type) {
info._defaultValue = "";
}
else if (typeof(Int32) == info._type) {
info._defaultValue = 0;
}
else if (typeof(Boolean) == info._type) {
info._defaultValue = false;
}
}
}
}
}
}
}
}
}
}
}
}
catch(System.InvalidOperationException e) {
ADP.TraceExceptionWithoutRethrow(e);
}
catch(System.Data.OleDb.OleDbException e) {
ADP.TraceExceptionWithoutRethrow(e);
}
catch(System.Security.SecurityException e) {
ADP.TraceExceptionWithoutRethrow(e);
}
}
_propertyInfo = providerInfo;
}
return providerInfo;
}
protected override void GetProperties(Hashtable propertyDescriptors) {
Dictionary<string,OleDbPropertyInfo> providerInfo = GetProviderInfo(Provider);
if (0 < providerInfo.Count) {
foreach(OleDbPropertyInfo info in providerInfo.Values) {
Keywords index;
if (!_keywords.TryGetValue(info._description, out index)) { // not a strongly typed property
bool isReadOnly = false;
bool refreshOnChange = false;
Attribute[] attributes;
if (OleDbPropertySetGuid.DBInit == info._propertySet) {
switch(info._propertyID) {
#if DEBUG
case ODB.DBPROP_AUTH_PERSIST_SENSITIVE_AUTHINFO:
case ODB.DBPROP_INIT_ASYNCH:
case ODB.DBPROP_INIT_DATASOURCE:
case ODB.DBPROP_INIT_HWND:
case ODB.DBPROP_INIT_OLEDBSERVICES:
Debug.Assert(false, "should be handled via strongly typed property");
goto default;
#endif
case ODB.DBPROP_INIT_CATALOG:
case ODB.DBPROP_INIT_LOCATION:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Source),
RefreshPropertiesAttribute.All,
};
break;
case ODB.DBPROP_INIT_TIMEOUT:
case ODB.DBPROP_INIT_GENERALTIMEOUT:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Initialization),
RefreshPropertiesAttribute.All,
};
break;
// 'Password' & 'User ID' will be readonly if 'Integrated Security' exists
case ODB.DBPROP_AUTH_PASSWORD:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
PasswordPropertyTextAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Security),
RefreshPropertiesAttribute.All,
};
isReadOnly = ContainsKey(DbConnectionStringKeywords.IntegratedSecurity);
refreshOnChange = true;
break;
case ODB.DBPROP_AUTH_USERID:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Security),
RefreshPropertiesAttribute.All,
};
isReadOnly = ContainsKey(DbConnectionStringKeywords.IntegratedSecurity);
refreshOnChange = true;
break;
case ODB.DBPROP_AUTH_CACHE_AUTHINFO:
case ODB.DBPROP_AUTH_ENCRYPT_PASSWORD:
case ODB.DBPROP_AUTH_INTEGRATED:
case ODB.DBPROP_AUTH_MASK_PASSWORD:
case ODB.DBPROP_AUTH_PERSIST_ENCRYPTED:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Security),
RefreshPropertiesAttribute.All,
};
refreshOnChange = (ODB.DBPROP_AUTH_INTEGRATED == info._propertyID);
break;
case ODB.DBPROP_INIT_BINDFLAGS:
case ODB.DBPROP_INIT_IMPERSONATION_LEVEL:
case ODB.DBPROP_INIT_LCID:
case ODB.DBPROP_INIT_MODE:
case ODB.DBPROP_INIT_PROTECTION_LEVEL:
case ODB.DBPROP_INIT_PROVIDERSTRING:
case ODB.DBPROP_INIT_LOCKOWNER:
attributes = new Attribute[] {
BrowsableAttribute.Yes,
new ResCategoryAttribute(Res.DataCategory_Advanced),
RefreshPropertiesAttribute.All,
};
break;
default:
Debug.Assert(false, "new standard propertyid");
attributes = new Attribute[] {
BrowsableAttribute.Yes,
RefreshPropertiesAttribute.All,
};
break;
}
}
else if (info._description.EndsWith(" Provider", StringComparison.OrdinalIgnoreCase)) {
attributes = new Attribute[] {
BrowsableAttribute.Yes,
RefreshPropertiesAttribute.All,
new ResCategoryAttribute(Res.DataCategory_Source),
new TypeConverterAttribute(typeof(OleDbConnectionStringBuilder.OleDbProviderConverter)),
};
refreshOnChange = true;
}
else {
attributes = new Attribute[] {
BrowsableAttribute.Yes,
RefreshPropertiesAttribute.All,
new CategoryAttribute(Provider),
};
}
DbConnectionStringBuilderDescriptor descriptor = new DbConnectionStringBuilderDescriptor(info._description,
typeof(OleDbConnectionStringBuilder), info._type, isReadOnly, attributes);
descriptor.RefreshOnChange = refreshOnChange;
propertyDescriptors[info._description] = descriptor;
}
// else strongly typed property already exists, i.e. DataSource
}
}
base.GetProperties(propertyDescriptors);
}
private sealed class OleDbProviderConverter : StringConverter {
private const int DBSOURCETYPE_DATASOURCE_TDP = 1;
private const int DBSOURCETYPE_DATASOURCE_MDP = 3;
private StandardValuesCollection _standardValues;
// converter classes should have public ctor
public OleDbProviderConverter() {
}
public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
return true;
}
public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
return false;
}
public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
StandardValuesCollection dataSourceNames = _standardValues;
if (null == _standardValues) {
// Get the sources rowset for the SQLOLEDB enumerator
DataTable table = (new OleDbEnumerator()).GetElements();
DataColumn column2 = table.Columns["SOURCES_NAME"];
DataColumn column5 = table.Columns["SOURCES_TYPE"];
//DataColumn column4 = table.Columns["SOURCES_DESCRIPTION"];
System.Collections.Generic.List<string> providerNames = new System.Collections.Generic.List<string>(table.Rows.Count);
foreach(DataRow row in table.Rows) {
int sourceType = (int)row[column5];
if (DBSOURCETYPE_DATASOURCE_TDP == sourceType || DBSOURCETYPE_DATASOURCE_MDP == sourceType) {
string progid = (string)row[column2];
if (!OleDbConnectionString.IsMSDASQL(progid.ToLower(CultureInfo.InvariantCulture))) {
if (0 > providerNames.IndexOf(progid)) {
providerNames.Add(progid);
}
}
}
}
// Create the standard values collection that contains the sources
dataSourceNames = new StandardValuesCollection(providerNames);
_standardValues = dataSourceNames;
}
return dataSourceNames;
}
}
[Flags()] internal enum OleDbServiceValues : int {
DisableAll = unchecked((int)0x00000000),
ResourcePooling = unchecked((int)0x00000001),
TransactionEnlistment = unchecked((int)0x00000002),
ClientCursor = unchecked((int)0x00000004),
AggregationAfterSession = unchecked((int)0x00000008),
EnableAll = unchecked((int)0xffffffff),
Default = ~(ClientCursor | AggregationAfterSession),
};
internal sealed class OleDbServicesConverter : TypeConverter {
private StandardValuesCollection _standardValues;
// converter classes should have public ctor
public OleDbServicesConverter() : base() {
}
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
// Only know how to convert from a string
return ((typeof(string) == sourceType) || base.CanConvertFrom(context, sourceType));
}
public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value) {
string svalue = (value as string);
if (null != svalue) {
Int32 services;
if(Int32.TryParse(svalue, out services)) {
return services;
}
else {
if (svalue.IndexOf(',') != -1) {
int convertedValue = 0;
string[] values = svalue.Split(new char[] {','});
foreach(string v in values) {
convertedValue |= (int)(OleDbServiceValues)Enum.Parse(typeof(OleDbServiceValues), v, true);
}
return (int)convertedValue;;
}
else {
return (int)(OleDbServiceValues)Enum.Parse(typeof(OleDbServiceValues), svalue, true);
}
}
}
return base.ConvertFrom(context, culture, value);
}
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
// Only know how to convert to the NetworkLibrary enumeration
return ((typeof(string) == destinationType) || base.CanConvertTo(context, destinationType));
}
public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) {
if ((typeof(string) == destinationType) && (null != value) && (typeof(Int32) == value.GetType())) {
return Enum.Format(typeof(OleDbServiceValues), ((OleDbServiceValues)(int)value), "G");
}
return base.ConvertTo(context, culture, value, destinationType);
}
public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
return true;
}
public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) {
return false;
}
public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
StandardValuesCollection standardValues = _standardValues;
if (null == standardValues) {
Array objValues = Enum.GetValues(typeof(OleDbServiceValues));
Array.Sort(objValues, 0, objValues.Length);
standardValues = new StandardValuesCollection(objValues);
_standardValues = standardValues;
}
return standardValues;
}
public override bool IsValid(ITypeDescriptorContext context, object value) {
return true;
//return Enum.IsDefined(type, value);
}
}
sealed internal class OleDbConnectionStringBuilderConverter : ExpandableObjectConverter {
// converter classes should have public ctor
public OleDbConnectionStringBuilderConverter() {
}
override public bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
if (typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor) == destinationType) {
return true;
}
return base.CanConvertTo(context, destinationType);
}
override public object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
if (destinationType == null) {
throw ADP.ArgumentNull("destinationType");
}
if (typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor) == destinationType) {
OleDbConnectionStringBuilder obj = (value as OleDbConnectionStringBuilder);
if (null != obj) {
return ConvertToInstanceDescriptor(obj);
}
}
return base.ConvertTo(context, culture, value, destinationType);
}
private System.ComponentModel.Design.Serialization.InstanceDescriptor ConvertToInstanceDescriptor(OleDbConnectionStringBuilder options) {
Type[] ctorParams = new Type[] { typeof(string) };
object[] ctorValues = new object[] { options.ConnectionString };
System.Reflection.ConstructorInfo ctor = typeof(OleDbConnectionStringBuilder).GetConstructor(ctorParams);
return new System.ComponentModel.Design.Serialization.InstanceDescriptor(ctor, ctorValues);
}
}
}
}
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