DataType

Type System.Data.DataColumn.DataType

getset

Definition at line 376 of file DataColumn.cs.

    {
        get
        {
            return _dataType;
        }
        [param: AllowNull]
        set
        {
            if (!(_dataType != value))
            {
                return;
            }
            if (HasData)
            {
                throw ExceptionBuilder.CantChangeDataType();
            }
            if (value == null)
            {
                throw ExceptionBuilder.NullDataType();
            }
            StorageType storageType = DataStorage.GetStorageType(value);
            if (DataStorage.ImplementsINullableValue(storageType, value))
            {
                throw ExceptionBuilder.ColumnTypeNotSupported();
            }
            if (_table != null && IsInRelation())
            {
                throw ExceptionBuilder.ColumnsTypeMismatch();
            }
            if (storageType == StorageType.BigInteger && _expression != null)
            {
                throw ExprException.UnsupportedDataType(value);
            }
            if (!DefaultValueIsNull)
            {
                try
                {
                    if (_defaultValue is BigInteger)
                    {
                        _defaultValue = BigIntegerStorage.ConvertFromBigInteger((BigInteger)_defaultValue, value, FormatProvider);
                    }
                    else if (typeof(BigInteger) == value)
                    {
                        _defaultValue = BigIntegerStorage.ConvertToBigInteger(_defaultValue, FormatProvider);
                    }
                    else if (typeof(string) == value)
                    {
                        _defaultValue = DefaultValue.ToString();
                    }
                    else if (typeof(SqlString) == value)
                    {
                        _defaultValue = SqlConvert.ConvertToSqlString(DefaultValue);
                    }
                    else if (typeof(object) != value)
                    {
                        DefaultValue = SqlConvert.ChangeTypeForDefaultValue(DefaultValue, value, FormatProvider);
                    }
                }
                catch (InvalidCastException inner)
                {
                    throw ExceptionBuilder.DefaultValueDataType(ColumnName, DefaultValue.GetType(), value, inner);
                }
                catch (FormatException inner2)
                {
                    throw ExceptionBuilder.DefaultValueDataType(ColumnName, DefaultValue.GetType(), value, inner2);
                }
            }
            if (ColumnMapping == MappingType.SimpleContent && value == typeof(char))
            {
                throw ExceptionBuilder.CannotSetSimpleContentType(ColumnName, value);
            }
            SimpleType = System.Data.SimpleType.CreateSimpleType(storageType, value);
            if (StorageType.String == storageType)
            {
                _maxLength = -1;
            }
            UpdateColumnType(value, storageType);
            XmlDataType = null;
            if (!AutoIncrement)
            {
                return;
            }
            if (!IsAutoIncrementType(value))
            {
                AutoIncrement = false;
            }
            if (_autoInc != null)
            {
                AutoIncrementValue autoInc = _autoInc;
                _autoInc = null;
                AutoInc.Auto = autoInc.Auto;
                AutoInc.Seed = autoInc.Seed;
                AutoInc.Step = autoInc.Step;
                if (_autoInc.DataType == autoInc.DataType)
                {
                    _autoInc.Current = autoInc.Current;
                }
                else if (autoInc.DataType == typeof(long))
                {
                    AutoInc.Current = (BigInteger)(long)autoInc.Current;
                }
                else
                {
                    AutoInc.Current = (long)(BigInteger)autoInc.Current;
                }
            }
        }
    }

Referenced by System.Data.DataRelation.CheckState(), System.Data.DataColumn.Clone(), System.Data.Common.DataColumnMapping.GetDataColumnBySchemaAction(), System.Data.DataTableReader.GetSchemaTableFromDataTable(), System.Data.ForeignKeyConstraint.NonVirtualCheckState(), and System.Data.DataColumn.SetValue().