ConstNode.cs source code in C# .NET

                        
Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / 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

• FormParameter.cs
• BitmapCacheBrush.cs
• StaticDataManager.cs
• DataGridViewCellValidatingEventArgs.cs
• ReliableRequestSessionChannel.cs
• Brush.cs
• XmlExpressionDumper.cs
• PtsCache.cs
• EntityTemplateFactory.cs
• SmtpTransport.cs
• FileClassifier.cs
• ProxyHelper.cs
• WSFederationHttpSecurity.cs
• TriggerAction.cs
• IgnorePropertiesAttribute.cs
• PointCollection.cs
• ListControlConvertEventArgs.cs
• SamlAuthorityBinding.cs
• SuppressMergeCheckAttribute.cs
• SecurityDescriptor.cs
• VerbConverter.cs
• ToolStripProfessionalLowResolutionRenderer.cs
• CustomCategoryAttribute.cs
• WindowsListViewSubItem.cs
• RestClientProxyHandler.cs
• HttpProfileBase.cs
• BasicBrowserDialog.designer.cs
• FloaterBaseParagraph.cs
• ConfigurationPermission.cs
• PersistenceContext.cs
• DirectionalLight.cs
• WindowsSlider.cs
• MailAddress.cs
• Logging.cs
• COM2ExtendedUITypeEditor.cs
• CapabilitiesSection.cs
• PermissionSet.cs
• MetadataCache.cs
• SRGSCompiler.cs
• GeneralTransform3D.cs
• ResourceDescriptionAttribute.cs
• HwndSourceParameters.cs
• LinearGradientBrush.cs
• CachedPathData.cs
• TdsParserSessionPool.cs
• ConfigXmlDocument.cs
• ProjectionPath.cs
• HtmlInputSubmit.cs
• CompiledELinqQueryState.cs
• ContentPresenter.cs
• PropertyNames.cs
• FileIOPermission.cs
• EntityDataSourceReferenceGroup.cs
• NodeFunctions.cs
• DataBinding.cs
• HtmlControl.cs
• FilteredAttributeCollection.cs
• ExtenderHelpers.cs
• ToolBarOverflowPanel.cs
• BaseParser.cs
• CompositeFontInfo.cs
• ExpressionBuilder.cs
• PolicyDesigner.cs
• AppDomainShutdownMonitor.cs
• NonClientArea.cs
• HitTestFilterBehavior.cs
• DataGridViewRowsRemovedEventArgs.cs
• GridViewRowPresenter.cs
• TopClause.cs
• ItemsControlAutomationPeer.cs
• Cursor.cs
• Parameter.cs
• COM2PictureConverter.cs
• SocketSettings.cs
• HideDisabledControlAdapter.cs
• SwitchElementsCollection.cs
• CategoryAttribute.cs
• EllipseGeometry.cs
• AdRotator.cs
• DBBindings.cs
• SQLConvert.cs
• TextViewSelectionProcessor.cs
• ComboBox.cs
• sortedlist.cs
• SQLBinary.cs
• PieceDirectory.cs
• DataGridTablesFactory.cs
• ZoneMembershipCondition.cs
• ContactManager.cs
• WindowsTab.cs
• FileUpload.cs
• IERequestCache.cs
• GlyphRunDrawing.cs
• AccessKeyManager.cs
• ControlParameter.cs
• CodeDelegateInvokeExpression.cs
• ThreadAttributes.cs
• DataGridViewColumnEventArgs.cs
• XPathBinder.cs
• WebReference.cs