ConstNode.cs source code in C# .NET

                        
Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Data / System / Data / Filter / ConstNode.cs / 1 / ConstNode.cs
                        

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

namespace System.Data { 
    using System;
    using System.Diagnostics;
    using System.Collections.Generic;
    using System.ComponentModel; 
    using System.Globalization;
 
    internal sealed class ConstNode : ExpressionNode { 
        internal readonly object val;
 
        internal ConstNode(DataTable table, ValueType type, object constant) : this(table, type, constant, true) {
        }

        internal ConstNode(DataTable table, ValueType type, object constant, bool fParseQuotes) : base(table) { 
            switch (type) {
                case ValueType.Null: 
                    this.val = DBNull.Value; 
                    break;
 
                case ValueType.Numeric:
                    this.val = SmallestNumeric(constant);
                    break;
                case ValueType.Decimal: 
                    this.val = SmallestDecimal(constant);
                    break; 
                case ValueType.Float: 
                    this.val = Convert.ToDouble(constant, NumberFormatInfo.InvariantInfo);
                    break; 

                case ValueType.Bool:
                    this.val = Convert.ToBoolean(constant, CultureInfo.InvariantCulture);
                    break; 

                case ValueType.Str: 
                    if (fParseQuotes) { 
                        // replace '' with one '
                        this.val = ((string)constant).Replace("''", "'"); 
                    }
                    else {
                        this.val = (string)constant;
                    } 
                    break;
 
                case ValueType.Date: 
                    this.val = DateTime.Parse((string)constant, CultureInfo.InvariantCulture);
                    break; 

                case ValueType.Object:
                    this.val = constant;
                    break; 

                default: 
                    Debug.Assert(false, "NYI"); 
                    goto case ValueType.Object;
            } 
        }

        internal override void Bind(DataTable table, List list) {
            BindTable(table); 
        }
 
        internal override object Eval() { 
            return val;
        } 

        internal override object Eval(DataRow row, DataRowVersion version) {
            return Eval();
        } 

        internal override object Eval(int[] recordNos) { 
            return Eval(); 
        }
 
        internal override bool IsConstant() {
            return true;
        }
 
        internal override bool IsTableConstant() {
            return true; 
        } 

        internal override bool HasLocalAggregate() { 
            return false;
        }
        internal override bool HasRemoteAggregate() {
            return false; 
        }
 
        internal override ExpressionNode Optimize() { 
            return this;
        } 

        private object SmallestDecimal(object constant) {
            if (null == constant) {
                return 0d; 
            }
            else { 
                string sval = (constant as string); 
                if (null != sval) {
                    decimal r12; 
                    if (Decimal.TryParse(sval, NumberStyles.Number, NumberFormatInfo.InvariantInfo, out r12)) {
                        return r12;
                    }
 
                    double r8;
                    if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) { 
                        return r8; 
                    }
                } 
                else {
                    IConvertible convertible = (constant as IConvertible);
                    if (null != convertible) {
                        try { 
                            return convertible.ToDecimal(NumberFormatInfo.InvariantInfo);
                        } 
                        catch (System.ArgumentException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.FormatException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.OverflowException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        try {
                            return convertible.ToDouble(NumberFormatInfo.InvariantInfo);
                        }
                        catch (System.ArgumentException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.OverflowException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                    } 
                }
            } 
            return constant;
        }

        private object SmallestNumeric(object constant) { 
            if (null == constant) {
                return (int)0; 
            } 
            else {
                string sval = (constant as string); 
                if (null != sval) {
                    int i4;
                    if (Int32.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i4)) {
                        return i4; 
                    }
                    long i8; 
                    if (Int64.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i8)) { 
                        return i8;
                    } 
                    double r8;
                    if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) {
                        return r8;
                    } 
                }
                else { 
                    IConvertible convertible = (constant as IConvertible); 
                    if (null != convertible) {
                        try { 
                            return convertible.ToInt32(NumberFormatInfo.InvariantInfo);
                        }
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
 
                        try { 
                            return convertible.ToInt64(NumberFormatInfo.InvariantInfo);
                        } 
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
 
                        try {
                            return convertible.ToDouble(NumberFormatInfo.InvariantInfo); 
                        } 
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.FormatException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        } 
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                    }
                }
            } 
            return constant;
        } 
    } 
}

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

namespace System.Data { 
    using System;
    using System.Diagnostics;
    using System.Collections.Generic;
    using System.ComponentModel; 
    using System.Globalization;
 
    internal sealed class ConstNode : ExpressionNode { 
        internal readonly object val;
 
        internal ConstNode(DataTable table, ValueType type, object constant) : this(table, type, constant, true) {
        }

        internal ConstNode(DataTable table, ValueType type, object constant, bool fParseQuotes) : base(table) { 
            switch (type) {
                case ValueType.Null: 
                    this.val = DBNull.Value; 
                    break;
 
                case ValueType.Numeric:
                    this.val = SmallestNumeric(constant);
                    break;
                case ValueType.Decimal: 
                    this.val = SmallestDecimal(constant);
                    break; 
                case ValueType.Float: 
                    this.val = Convert.ToDouble(constant, NumberFormatInfo.InvariantInfo);
                    break; 

                case ValueType.Bool:
                    this.val = Convert.ToBoolean(constant, CultureInfo.InvariantCulture);
                    break; 

                case ValueType.Str: 
                    if (fParseQuotes) { 
                        // replace '' with one '
                        this.val = ((string)constant).Replace("''", "'"); 
                    }
                    else {
                        this.val = (string)constant;
                    } 
                    break;
 
                case ValueType.Date: 
                    this.val = DateTime.Parse((string)constant, CultureInfo.InvariantCulture);
                    break; 

                case ValueType.Object:
                    this.val = constant;
                    break; 

                default: 
                    Debug.Assert(false, "NYI"); 
                    goto case ValueType.Object;
            } 
        }

        internal override void Bind(DataTable table, List list) {
            BindTable(table); 
        }
 
        internal override object Eval() { 
            return val;
        } 

        internal override object Eval(DataRow row, DataRowVersion version) {
            return Eval();
        } 

        internal override object Eval(int[] recordNos) { 
            return Eval(); 
        }
 
        internal override bool IsConstant() {
            return true;
        }
 
        internal override bool IsTableConstant() {
            return true; 
        } 

        internal override bool HasLocalAggregate() { 
            return false;
        }
        internal override bool HasRemoteAggregate() {
            return false; 
        }
 
        internal override ExpressionNode Optimize() { 
            return this;
        } 

        private object SmallestDecimal(object constant) {
            if (null == constant) {
                return 0d; 
            }
            else { 
                string sval = (constant as string); 
                if (null != sval) {
                    decimal r12; 
                    if (Decimal.TryParse(sval, NumberStyles.Number, NumberFormatInfo.InvariantInfo, out r12)) {
                        return r12;
                    }
 
                    double r8;
                    if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) { 
                        return r8; 
                    }
                } 
                else {
                    IConvertible convertible = (constant as IConvertible);
                    if (null != convertible) {
                        try { 
                            return convertible.ToDecimal(NumberFormatInfo.InvariantInfo);
                        } 
                        catch (System.ArgumentException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.FormatException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.OverflowException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        try {
                            return convertible.ToDouble(NumberFormatInfo.InvariantInfo);
                        }
                        catch (System.ArgumentException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.OverflowException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                    } 
                }
            } 
            return constant;
        }

        private object SmallestNumeric(object constant) { 
            if (null == constant) {
                return (int)0; 
            } 
            else {
                string sval = (constant as string); 
                if (null != sval) {
                    int i4;
                    if (Int32.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i4)) {
                        return i4; 
                    }
                    long i8; 
                    if (Int64.TryParse(sval, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out i8)) { 
                        return i8;
                    } 
                    double r8;
                    if (Double.TryParse(sval, NumberStyles.Float| NumberStyles.AllowThousands, NumberFormatInfo.InvariantInfo, out r8)) {
                        return r8;
                    } 
                }
                else { 
                    IConvertible convertible = (constant as IConvertible); 
                    if (null != convertible) {
                        try { 
                            return convertible.ToInt32(NumberFormatInfo.InvariantInfo);
                        }
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
 
                        try { 
                            return convertible.ToInt64(NumberFormatInfo.InvariantInfo);
                        } 
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
                        catch (System.FormatException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) { 
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        }
 
                        try {
                            return convertible.ToDouble(NumberFormatInfo.InvariantInfo); 
                        } 
                        catch (System.ArgumentException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                        catch (System.FormatException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e);
                        } 
                        catch (System.InvalidCastException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        } 
                        catch (System.OverflowException e) {
                            ExceptionBuilder.TraceExceptionWithoutRethrow(e); 
                        }
                    }
                }
            } 
            return constant;
        } 
    } 
}

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

                        

                        

                        
                        

Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK

• precedingsibling.cs
• DocumentReference.cs
• IconBitmapDecoder.cs
• AnnotationResource.cs
• ProviderConnectionPoint.cs
• ManagementScope.cs
• DoubleLinkListEnumerator.cs
• PackWebRequestFactory.cs
• ReadOnlyDictionary.cs
• CorePropertiesFilter.cs
• PartitionResolver.cs
• SafeCryptContextHandle.cs
• SmiRequestExecutor.cs
• ConnectionInterfaceCollection.cs
• NavigateEvent.cs
• ResourcePart.cs
• FormViewDeletedEventArgs.cs
• StateManager.cs
• CreateUserWizardStep.cs
• XmlEntity.cs
• Polyline.cs
• SymDocumentType.cs
• ColorKeyFrameCollection.cs
• MethodMessage.cs
• SetterBaseCollection.cs
• EventItfInfo.cs
• User.cs
• ApplicationSettingsBase.cs
• SpotLight.cs
• UriTemplateVariablePathSegment.cs
• GregorianCalendarHelper.cs
• SqlCharStream.cs
• Border.cs
• BufferedOutputStream.cs
• ConstraintCollection.cs
• PropertyEntry.cs
• Cursors.cs
• HtmlControlPersistable.cs
• ConstNode.cs
• BodyGlyph.cs
• DataGridViewRowPrePaintEventArgs.cs
• ObjectReaderCompiler.cs
• Empty.cs
• TextTreeUndoUnit.cs
• LabelAutomationPeer.cs
• DataServiceProcessingPipeline.cs
• SR.cs
• IncrementalReadDecoders.cs
• InfoCardSymmetricCrypto.cs
• WpfGeneratedKnownTypes.cs
• oledbconnectionstring.cs
• StringSource.cs
• SecurityContext.cs
• PageSettings.cs
• FacetDescriptionElement.cs
• EventLogPermissionAttribute.cs
• ConstructorExpr.cs
• CanonicalXml.cs
• RequiredAttributeAttribute.cs
• LayoutEvent.cs
• ToolBarDesigner.cs
• RectangleGeometry.cs
• GeneralTransform3D.cs
• ReachIDocumentPaginatorSerializerAsync.cs
• TypeUtil.cs
• CorrelationHandle.cs
• StrongNameMembershipCondition.cs
• Application.cs
• DropAnimation.xaml.cs
• ChildrenQuery.cs
• MaterializeFromAtom.cs
• VisualTarget.cs
• DataGridViewCellValueEventArgs.cs
• ChooseAction.cs
• ItemMap.cs
• InternalCache.cs
• Executor.cs
• Version.cs
• FileLogRecordHeader.cs
• FileSecurity.cs
• BamlStream.cs
• FunctionNode.cs
• HttpWebRequest.cs
• SafeRightsManagementHandle.cs
• AtomicFile.cs
• WebPartsPersonalizationAuthorization.cs
• CommonGetThemePartSize.cs
• TextBlock.cs
• DeflateEmulationStream.cs
• TransformerInfoCollection.cs
• UserControl.cs
• ButtonBase.cs
• namescope.cs
• FontStretch.cs
• CqlQuery.cs
• AttachedPropertyDescriptor.cs
• PageAdapter.cs
• CalendarDayButton.cs
• SegmentTree.cs
• WebBrowserNavigatingEventHandler.cs