Value

FrameworkFork\Microsoft.Xml\Xml\Serialization\Mappings.cs (1)

49get { return _defaultValue != null && _defaultValue != DBNull.Value; }

FrameworkFork\Microsoft.Xml\Xml\Serialization\SoapReflectionImporter.cs (1)

766if (a.SoapDefaultValue == null || a.SoapDefaultValue == DBNull.Value) return null;

FrameworkFork\Microsoft.Xml\Xml\Serialization\XmlCodeExporter.cs (3)

356return DBNull.Value; 415return DBNull.Value; 490if (value == DBNull.Value)

FrameworkFork\Microsoft.Xml\Xml\Serialization\XmlReflectionImporter.cs (1)

2135if (a.XmlDefaultValue == null || a.XmlDefaultValue == DBNull.Value) return null;

FrameworkFork\Microsoft.Xml\Xml\Serialization\XmlSchemaExporter.cs (1)

910if (value == null || value == DBNull.Value)

FrameworkFork\Microsoft.Xml\Xml\Serialization\XmlSerializationWriter.cs (2)

1637bool hasDefault = defaultValue != null && defaultValue != DBNull.Value; 1720bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc.HasDefaultSupport;

FrameworkFork\Microsoft.Xml\Xml\Serialization\XmlSerializationWriterILGen.cs (2)

94bool hasDefault = defaultValue != null && defaultValue != DBNull.Value; 197bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc.HasDefaultSupport;

Platform\Custom\MetadataSignatureHelper.cs (1)

151if (defaultValue != DBNull.Value)

DataFrame.IO.cs (1)

169items[c] = row[c] ?? DBNull.Value;

src\Shared\JsonSchemaExporter\JsonSchemaExporter.ReflectionHelpers.cs (1)

314if (defaultValue == DBNull.Value && parameterType != typeof(DBNull))

Utilities\AIJsonUtilities.Schema.cs (1)

457if (defaultValue is null || (defaultValue == DBNull.Value && parameterType != typeof(DBNull)))

SqlParameterCollectionExtensions.cs (2)

75return parameters.AddWithValue(Columns.Names.SlidingExpirationInSeconds, SqlDbType.BigInt, DBNull.Value); 91Columns.Names.AbsoluteExpiration, SqlDbType.DateTimeOffset, DBNull.Value);

Microsoft\VisualBasic\CompilerServices\VB6InputFile.vb (1)

91ParseInputString = DBNull.Value

Microsoft\VisualBasic\CompilerServices\VB6RandomFile.vb (1)

278Value = DBNull.Value

System\Windows\Data\BindingExpression.cs (2)

1363else if ((value == DBNull.Value) && (Converter == null || UseDefaultValueConverter)) 1880value = DBNull.Value;

JsonSchemaExporter\JsonSchemaExporter.ReflectionHelpers.cs (1)

314if (defaultValue == DBNull.Value && parameterType != typeof(DBNull))

src\libraries\Common\src\System\Data\Common\AdapterUtil.cs (1)

484if ((null == value) || (DBNull.Value == value))

System\Data\Common\DataStorage.cs (2)

131: this(column, type, defaultValue, DBNull.Value, false, storageType) 530return ((null == value) || (DBNull.Value == value) || IsObjectSqlNull(value));

System\Data\Common\ObjectStorage.cs (1)

31: base(column, type, null, DBNull.Value, typeof(ICloneable).IsAssignableFrom(type), GetStorageType(type))

System\Data\Common\SQLTypes\SQLBytesStorage.cs (1)

80if ((value == DBNull.Value) || (value == null))

System\Data\Common\SQLTypes\SQLCharsStorage.cs (1)

82if ((value == DBNull.Value) || (value == null))

System\Data\Common\SqlUDTStorage.cs (2)

77if (DBNull.Value == value) 109if (DBNull.Value == value)

System\Data\DataColumn.cs (12)

38internal object _defaultValue = DBNull.Value; // DefaultValue Converter 648if (_defaultValue == DBNull.Value && _implementsINullable) 681object newDefaultValue = value ?? DBNull.Value; 682if (newDefaultValue != DBNull.Value && DataType != typeof(object)) 695_defaultValueIsNull = ((newDefaultValue == DBNull.Value) || (ImplementsINullable && DataStorage.IsObjectSqlNull(newDefaultValue))) ? true : false; 1432if (dr[this] == DBNull.Value) 1538clone._defaultValueIsNull = ((_defaultValue == DBNull.Value) || (clone.ImplementsINullable && DataStorage.IsObjectSqlNull(_defaultValue))) ? true : false; 1585return kind == AggregateType.Count ? (object)0 : DBNull.Value; 1691if (value != null && value != DBNull.Value && ((string)value).Length > MaxLength) 1717DataRow[] rows = index.GetRows(index.FindRecords(DBNull.Value)); 1777Debug.Assert(value != null && (value != DBNull.Value), "Caller is responsible for checking on DBNull"); 1785Debug.Assert(value != null && (value != DBNull.Value), "Caller is responsible for checking on DBNull");

System\Data\DataColumnPropertyDescriptor.cs (2)

57return (dataRowView.GetColumnValue(Column) != DBNull.Value); 72dataRowView.SetColumnValue(Column, DBNull.Value); // no need to ccheck for the col type and set Sql...Null!

System\Data\DataRow.cs (9)

152if ((DBNull.Value != value) && ((IChangeTracking)value).IsChanged) 326proposed = DBNull.Value; 417/// should be left as-is. <see cref="DBNull.Value" /> can be used to set the value to null. 497proposed = DBNull.Value; 552if (DBNull.Value != value) 1195if (DBNull.Value != value) 1212if (DBNull.Value != value) 1265this[column] = DBNull.Value; 1360parentKeyValues[0] = DBNull.Value;

System\Data\DataRowComparer.cs (4)

27if (a is null || ReferenceEquals(a, DBNull.Value) || 28b is null || ReferenceEquals(b, DBNull.Value)) 43if (a is null || ReferenceEquals(a, DBNull.Value) || 44b is null || ReferenceEquals(b, DBNull.Value))

System\Data\DataRowExtensions.cs (6)

116row[columnIndex] = (object?)value ?? DBNull.Value; 128row[columnName] = (object?)value ?? DBNull.Value; 140row[column] = (object?)value ?? DBNull.Value; 174if (value == DBNull.Value) 185if (value == DBNull.Value) 205=> value == DBNull.Value ? default : new Nullable<TElem>((TElem)value);

System\Data\DataTable.cs (1)

3477row[c] = DBNull.Value;

System\Data\DataTableReader.cs (1)

817if (dc.DefaultValue != DBNull.Value)

System\Data\DefaultValueTypeConverter.cs (2)

32else if (value == DBNull.Value) 52return DBNull.Value;

System\Data\Filter\BinaryNode.cs (41)

System\Data\Filter\ConstNode.cs (1)

24_val = DBNull.Value;

System\Data\Filter\DataExpression.cs (2)

136if (result != DBNull.Value || StorageType.Uri < _storageType) 190return DBNull.Value;

System\Data\Filter\FunctionNode.cs (12)

146if ((argumentValues[i] == DBNull.Value) || (typeof(object) == s_funcs[_info]._parameters[i])) 150return DBNull.Value; 366return DBNull.Value; 411return DBNull.Value; 453return DBNull.Value; 469return DBNull.Value; 481if (argumentValues[0] == DBNull.Value) 483return DBNull.Value; 533if (argumentValues[0] == DBNull.Value || argumentValues[1] == DBNull.Value || argumentValues[2] == DBNull.Value) 534return DBNull.Value;

System\Data\Filter\LookupNode.cs (1)

100return DBNull.Value;

System\Data\Filter\UnaryNode.cs (2)

53return DBNull.Value; 119value = DBNull.Value;

System\Data\Filter\ZeroOpNode.cs (2)

38return DBNull.Value; 41return DBNull.Value;

System\Data\ForeignKeyConstraint.cs (2)

316proposedKey[i] = DBNull.Value; 456proposedKey[i] = DBNull.Value;

System\Data\ProviderBase\SchemaMapping.cs (6)

333_ => DBNull.Value, 1153if (DBNull.Value != value) 1163if (DBNull.Value != value) 1173if (DBNull.Value != value) 1183if (DBNull.Value != value) 1193if (DBNull.Value != value)

System\Data\Select.cs (4)

657if ((vLeft == DBNull.Value) || (expr._left.IsSqlColumn && DataStorage.IsObjectSqlNull(vLeft))) 659if ((vRight == DBNull.Value) || (expr._right.IsSqlColumn && DataStorage.IsObjectSqlNull(vRight))) 705case Operators.Is: c = (vLeft == DBNull.Value ? 0 : -1); break; 706case Operators.IsNot: c = (vLeft != DBNull.Value ? 0 : 1); break;

System\Data\XmlDataLoader.cs (8)

390row[column] = DBNull.Value; 424row[c] = DBNull.Value; 478row[c] = DBNull.Value; 834foundColumns[i] = DBNull.Value; // Assign DBNull if possible 1071c[row._tempRecord] = foundColumns[i] ?? DBNull.Value; 1102foundColumns[i] = DBNull.Value; // Assign DBNull if possible 1194columnValue = DBNull.Value; // change to DBNull; 1348foundColumns[column.Ordinal] = DBNull.Value;

System\Data\XMLDiffLoader.cs (1)

324col[record] = DBNull.Value;

System\Data\xmlsaver.cs (5)

2602if ((columnValue != DBNull.Value) && (!col.ImplementsINullable || !DataStorage.IsObjectSqlNull(columnValue))) 2978if ((value != DBNull.Value) && (!col.ImplementsINullable || !DataStorage.IsObjectSqlNull(value))) 2992if ((value != DBNull.Value) && (!col.ImplementsINullable || !DataStorage.IsObjectSqlNull(value))) 3008if (((value == DBNull.Value) || (col.ImplementsINullable && DataStorage.IsObjectSqlNull(value))) && (col.ColumnMapping == MappingType.SimpleContent)) 3012if (((value != DBNull.Value) && (!col.ImplementsINullable || !DataStorage.IsObjectSqlNull(value))) && (col._columnMapping != MappingType.Attribute))

System\Xml\XmlDataDocument.cs (3)

2383row[col] = DBNull.Value; 2476row[column] = DBNull.Value; 2512row[c] = DBNull.Value;

System\Xml\XPathNodePointer.cs (1)

410if (colVal == DBNull.Value)

src\libraries\Common\src\System\Data\Common\AdapterUtil.cs (1)

484if ((null == value) || (DBNull.Value == value))

src\libraries\Common\src\System\Data\ProviderBase\DbMetaDataFactory.cs (3)

141restrictionParameter.Value = DBNull.Value; 517if (version != DBNull.Value) 536if (version != DBNull.Value)

System\Data\Odbc\OdbcCommandBuilder.cs (2)

87if (DBNull.Value != bvalue) 94if (DBNull.Value != bvalue)

System\Data\Odbc\OdbcDataReader.cs (1)

1790_dataCache![i] = DBNull.Value;

System\Data\Odbc\OdbcMetaDataFactory.cs (10)

139if (odbcSource != DBNull.Value) 154return DBNull.Value; 341if ((getTypeInfoValues[indexAUTO_UNIQUE_VALUE] == DBNull.Value) || 354if (getTypeInfoValues[indexNULLABLE] != DBNull.Value) 368dataTypesRow[isNullableColumn] = DBNull.Value; 373if (DBNull.Value != getTypeInfoValues[indexSEARCHABLE]) 404if (getTypeInfoValues[indexMAXIMUM_SCALE] != DBNull.Value) 409if (getTypeInfoValues[indexMINIMUM_SCALE] != DBNull.Value) 414if (getTypeInfoValues[indexLITERAL_PREFIX] != DBNull.Value) 419if (getTypeInfoValues[indexLITERAL_SUFFIX] != DBNull.Value)

System\Data\Odbc\OdbcParameter.cs (1)

959Value = DBNull.Value;

src\libraries\Common\src\System\Net\LazyAsyncResult.cs (6)

63_result = DBNull.Value; 250return _result == DBNull.Value ? null : _result; 261Debug.Assert(value != DBNull.Value, "Result can't be set to DBNull - it's a special internal value."); 300if (result == DBNull.Value) 314if (_result == DBNull.Value) 477while (_result == DBNull.Value)

src\libraries\Common\src\System\Net\LazyAsyncResult.cs (6)

63_result = DBNull.Value; 250return _result == DBNull.Value ? null : _result; 261Debug.Assert(value != DBNull.Value, "Result can't be set to DBNull - it's a special internal value."); 300if (result == DBNull.Value) 314if (_result == DBNull.Value) 477while (_result == DBNull.Value)

src\libraries\Common\src\System\Net\LazyAsyncResult.cs (6)

63_result = DBNull.Value; 250return _result == DBNull.Value ? null : _result; 261Debug.Assert(value != DBNull.Value, "Result can't be set to DBNull - it's a special internal value."); 300if (result == DBNull.Value) 314if (_result == DBNull.Value) 477while (_result == DBNull.Value)

src\libraries\System.Private.CoreLib\src\System\Convert.cs (2)

90public static readonly object DBNull = System.DBNull.Value; 111if (value == System.DBNull.Value) return true;

src\libraries\System.Private.CoreLib\src\System\DefaultBinder.cs (2)

133if (par[j].DefaultValue == DBNull.Value) 140if (par[j].DefaultValue == DBNull.Value)

src\libraries\System.Private.CoreLib\src\System\Reflection\MethodBase.cs (1)

144if (paramInfo.DefaultValue == DBNull.Value)

src\libraries\System.Private.CoreLib\src\System\Runtime\InteropServices\Marshalling\ComVariant.cs (1)

453return (T)(object)DBNull.Value;

src\libraries\System.Private.CoreLib\src\System\UnitySerializationHolder.cs (1)

56return DBNull.Value;

src\System\Reflection\MdConstant.cs (3)

29return DBNull.Value; 86return DBNull.Value; 110CorElementType.ELEMENT_TYPE_VOID => DBNull.Value,

src\System\Reflection\MdFieldInfo.cs (1)

96if (value == DBNull.Value)

src\System\Reflection\RuntimeParameterInfo.cs (6)

316return DBNull.Value; 329return DBNull.Value; 339defaultValue = DBNull.Value; 351if (defaultValue == DBNull.Value) 362if (defaultValue == DBNull.Value) 414return DBNull.Value;

src\System\Reflection\RuntimePropertyInfo.cs (1)

217if (defaultValue == DBNull.Value)

System\Xml\Serialization\Mappings.cs (1)

51get { return _defaultValue != null && _defaultValue != DBNull.Value; }

System\Xml\Serialization\ReflectionXmlSerializationReader.cs (1)

868else if ((element.Default != null && element.Default != DBNull.Value && element.Mapping.TypeDesc!.IsValueType)

System\Xml\Serialization\ReflectionXmlSerializationWriter.cs (2)

554bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc!.HasDefaultSupport; 1004bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc!.HasDefaultSupport;

System\Xml\Serialization\SoapReflectionImporter.cs (1)

741if (a.SoapDefaultValue == null || a.SoapDefaultValue == DBNull.Value) return null;

System\Xml\Serialization\XmlReflectionImporter.cs (1)

2150if (a.XmlDefaultValue == null || a.XmlDefaultValue == DBNull.Value) return null;

System\Xml\Serialization\XmlSchemaExporter.cs (1)

869if (value == null || value == DBNull.Value)

System\Xml\Serialization\XmlSerializationReader.cs (1)

4664if (element.Default != null && element.Default != DBNull.Value && element.Mapping.TypeDesc!.IsValueType)

System\Xml\Serialization\XmlSerializationReaderILGen.cs (1)

3020if (element.Default != null && element.Default != DBNull.Value && element.Mapping.TypeDesc!.IsValueType)

System\Xml\Serialization\XmlSerializationWriter.cs (2)

2365bool hasDefault = defaultValue != null && defaultValue != DBNull.Value; 2449bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc!.HasDefaultSupport;

System\Xml\Serialization\XmlSerializationWriterILGen.cs (2)

96bool hasDefault = defaultValue != null && defaultValue != DBNull.Value; 194bool hasDefault = defaultValue != null && defaultValue != DBNull.Value && mapping.TypeDesc!.HasDefaultSupport;

System\Reflection\Emit\FieldBuilderImpl.cs (1)

25internal object? _defaultValue = DBNull.Value;

System\Reflection\Emit\ModuleBuilderImpl.cs (3)

295if (property._defaultValue != DBNull.Value) 397if (parameter._defaultValue != DBNull.Value) 652if (field.Attributes.HasFlag(FieldAttributes.HasDefault) && field._defaultValue != DBNull.Value)

System\Reflection\Emit\ParameterBuilderImpl.cs (2)

17internal object? _defaultValue = DBNull.Value; 87public override bool HasDefaultValue => _pb._defaultValue != DBNull.Value;

System\Reflection\Emit\PropertyBuilderImpl.cs (2)

27internal object? _defaultValue = DBNull.Value; 139public override object? GetConstantValue() => _defaultValue == DBNull.Value ? null : _defaultValue;

System\Reflection\TypeLoading\Parameters\Ecma\EcmaFatMethodParameter.cs (1)

48return IsOptional ? (object)Missing.Value : (object)DBNull.Value;

System\Runtime\InteropServices\Marshalling\ComVariantMarshaller.cs (1)

130return DBNull.Value;

src\libraries\System.Text.Json\Common\ReflectionExtensions.cs (1)

299if (defaultValue == DBNull.Value && parameterType != typeof(DBNull))

System\Windows\Forms\Controls\DataGridView\DataGridViewCellStyle.cs (3)

127: DBNull.Value; 137Properties.AddOrRemoveValue(s_propDataSourceNullValue, value, DBNull.Value); 215return value == DBNull.Value;

System\Windows\Forms\Controls\DataGridView\DataGridViewComboBoxCell.cs (6)

913if (value is null || ((ValueType is not null && !ValueType.IsAssignableFrom(value.GetType())) && value != DBNull.Value)) 957if (value == DBNull.Value) 959displayValue = DBNull.Value; 997&& value != DBNull.Value 2405if (originalValue == DBNull.Value) 2407value = DBNull.Value;

System\Windows\Forms\Controls\ListControl\ListControl.cs (1)

563DBNull.Value);

System\Windows\Forms\Internal\Formatter.cs (9)

18private static readonly object s_defaultDataSourceNullValue = DBNull.Value; 49value = DBNull.Value; 96if (value == DBNull.Value || value is null) 264return result == DBNull.Value ? NullData(oldTargetType, dataSourceNullValue) : result; 289if (EqualsFormattedNullValue(value, formattedNullValue, formatInfo) || value == DBNull.Value) 291return DBNull.Value; 323return DBNull.Value; 495value == DBNull.Value || 508if (dataSourceNullValue is null || dataSourceNullValue == DBNull.Value)

System\Windows\Forms\BindingTests.cs (13)

33Assert.Same(DBNull.Value, binding.DataSourceNullValue); 62Assert.Same(DBNull.Value, binding.DataSourceNullValue); 91Assert.Same(DBNull.Value, binding.DataSourceNullValue); 104yield return new object[] { string.Empty, new(), string.Empty, true, DataSourceUpdateMode.OnValidation - 1, DBNull.Value }; 120Assert.Same(DBNull.Value, binding.DataSourceNullValue); 133yield return new object[] { string.Empty, new(), string.Empty, true, DataSourceUpdateMode.OnValidation - 1, DBNull.Value, string.Empty }; 149Assert.Same(DBNull.Value, binding.DataSourceNullValue); 162yield return new object[] { string.Empty, new(), string.Empty, true, DataSourceUpdateMode.OnValidation - 1, DBNull.Value, string.Empty, CultureInfo.CurrentCulture }; 178Assert.Same(DBNull.Value, binding.DataSourceNullValue); 192yield return new object[] { DBNull.Value }; 301yield return new object[] { DBNull.Value }; 448yield return new object[] { false, new ConvertEventArgs(DBNull.Value, typeof(int)), DBNull.Value };

System\Windows\Forms\DataGridViewCellStyleTests.cs (8)

22Assert.Equal(DBNull.Value, style.DataSourceNullValue); 88Assert.Equal(DBNull.Value, style.DataSourceNullValue); 161yield return new object[] { DBNull.Value, true }; 254style.DataSourceNullValue = DBNull.Value; 255Assert.Equal(DBNull.Value, style.DataSourceNullValue); 383yield return new object[] { DBNull.Value, false }; 756Assert.Equal(DBNull.Value, style.DataSourceNullValue); 822Assert.Equal(DBNull.Value, style.DataSourceNullValue);

System\Windows\Forms\DataGridViewCellTests.cs (3)

6095yield return new object[] { typeof(object), typeof(DBNull), DBNull.Value, new DataGridViewCellStyle(), null, null, null }; 6102yield return new object[] { typeof(int), typeof(int), 1, new DataGridViewCellStyle { NullValue = 1 }, null, null, DBNull.Value }; 6134yield return new object[] { typeof(bool), typeof(CheckState), CheckState.Indeterminate, new DataGridViewCellStyle(), null, null, DBNull.Value };