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Date Formate when using ds.WriteXmlEventDate. I've ensured that the field is defined as Date as opposed to DateTime in the Typed Dataset. When I generate an xml file from an instance of this typed dataset using the ds.WriteXml method, all the dates come out formatted as follows: <EventDate>2004-01-26T00:00:00.0000000-05:00</EventDate> which is the DateTime datatype of the W3C XML Schema Part 2: Datatypes I want the dates to come out as <EventDate>2004-01-26</EventDate> which is the Date datatype of the W3C XML Schema Part 2: Datatypes How to I force the WriteXml method to output dates as the Date datatype as opposed to the DateTime datatype? "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message news:%23iSZ3g6yEHA.3408@tk2msftngp13.phx.gbl... I think you'll need to use an XmlTextWriter subclass to intercept the output> I have a Table in a Typed Dataset which contains a Date field called > EventDate. I've ensured that the field is defined as Date as opposed > to DateTime in the Typed Dataset. : : > <EventDate>2004-01-26T00:00:00.0000000-05:00</EventDate> > > which is the DateTime datatype of the W3C XML Schema Part 2: Datatypes > > I want the dates to come out as > > <EventDate>2004-01-26</EventDate> of WriteXml( ) when it's writing these dates. Here's a XmlTextWriter to get you started, - - - DsDateFilterXmlTextWriter.cs // . . . public class DsDateFilterXmlTextWriter : XmlTextWriter { private string watchElement; private bool onWatch; public DsDateFilterXmlTextWriter( TextWriter writer, string watchElement) : base( writer) { this.watchElement = watchElement; } public override void WriteStartElement( string prefix, string localName, string ns) { base.WriteStartElement( prefix, localName, ns); if ( 0 == string.Compare( this.watchElement, localName)) { onWatch = true; } } public override void WriteString( string text) { if ( onWatch ) { try { DateTime dt = DateTime.Parse( text); text = dt.ToString( "yyyy-MM-dd"); } catch ( FormatException ) { ; } onWatch = false; } base.WriteString( text); } } // . . . dataSet1.WriteXml( new DsDateFilterXmlTextWriter( Console.Out, "EventDate") ); // . . . - - - The DataSet represents the value with the time zone to ensure it's unambiguous what date it represents (for instance, at 11 p.m. in Chicago, the date you've given is January 25, but in London, England, it's January 26). Derek Harmon Thanks for the very robust reply.
I understand that the DateTime format contains the time zone information. But there are many situations where the time zone information isn't appropriate and just the simple Date is necessary. The W3C recognizes this by the fact that they also define a simple Date-only format (Namely "Date") as an alternative to DateTime. I wish Microsoft would have given us some kind of property to set to control whether dates are spit out as DateTime or Date rather than forcing DateTime. In our particular application, we need to send to customers around the world, lists of dates indicating when bank holidays occur around the world. It doesn't make sense to have my particular time zone information (Eastern Standard) included in a list of bank holidays for Tokyo. The problem with your suggestion for my particular case is that I also want to be able to use the ds.WriteXmlSchema method to send my clients a schema which matches my data. So I would also have to do some fiddling with that to match the changes you've suggested. I suppose I could just create a new string field in my Datatable to contain the string value of the date, but then the schema would define that field as a String rather that a Date. Perhaps your suggestion is my only option and I'll have to also have code to modify the schema and code to make sure everything is in synch - yecht. I hope I don't sound like I'm complaining to you. I just hope someone from Microsoft is watching. Thanks again for your help. Bob Scarborough Show quote "Derek Harmon" <loresa***@msn.com> wrote in message watchElement) : base( writer)news:ujAxcIGzEHA.2804@TK2MSFTNGP15.phx.gbl... > "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message news:%23iSZ3g6yEHA.3408@tk2msftngp13.phx.gbl... > > I have a Table in a Typed Dataset which contains a Date field called > > EventDate. I've ensured that the field is defined as Date as opposed > > to DateTime in the Typed Dataset. > : : > > <EventDate>2004-01-26T00:00:00.0000000-05:00</EventDate> > > > > which is the DateTime datatype of the W3C XML Schema Part 2: Datatypes > > > > I want the dates to come out as > > > > <EventDate>2004-01-26</EventDate> > > I think you'll need to use an XmlTextWriter subclass to intercept the output > of WriteXml( ) when it's writing these dates. Here's a XmlTextWriter to get > you started, > > - - - DsDateFilterXmlTextWriter.cs > // . . . > public class DsDateFilterXmlTextWriter : XmlTextWriter > { > private string watchElement; > private bool onWatch; > > public DsDateFilterXmlTextWriter( TextWriter writer, string > { localName, string ns)> this.watchElement = watchElement; > } > > public override void WriteStartElement( string prefix, string Show quote > { > base.WriteStartElement( prefix, localName, ns); > if ( 0 == string.Compare( this.watchElement, localName)) > { > onWatch = true; > } > } > > public override void WriteString( string text) > { > if ( onWatch ) > { > try > { > DateTime dt = DateTime.Parse( text); > text = dt.ToString( "yyyy-MM-dd"); > } > catch ( FormatException ) > { > ; > } > onWatch = false; > } > base.WriteString( text); > } > } > // . . . > dataSet1.WriteXml( new DsDateFilterXmlTextWriter( Console.Out, "EventDate") ); > // . . . > - - - > > The DataSet represents the value with the time zone to ensure it's unambiguous > what date it represents (for instance, at 11 p.m. in Chicago, the date you've > given is January 25, but in London, England, it's January 26). > > > Derek Harmon > > For relevant discussion, see
http://blogs.msdn.com/brada/archive/2004/04/13/112784.aspx Show quote "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message news:%23SXAbsIzEHA.576@TK2MSFTNGP14.phx.gbl... > Thanks for the very robust reply. > > I understand that the DateTime format contains the time zone information. > But there are many situations where the time zone information isn't > appropriate and just the simple Date is necessary. The W3C recognizes > this > by the fact that they also define a simple Date-only format (Namely > "Date") > as an alternative to DateTime. > > I wish Microsoft would have given us some kind of property to set to > control > whether dates are spit out as DateTime or Date rather than forcing > DateTime. > In our particular application, we need to send to customers around the > world, lists of dates indicating when bank holidays occur around the > world. > It doesn't make sense to have my particular time zone information (Eastern > Standard) included in a list of bank holidays for Tokyo. > > The problem with your suggestion for my particular case is that I also > want > to be able to use the ds.WriteXmlSchema method to send my clients a > schema > which matches my data. So I would also have to do some fiddling with that > to match the changes you've suggested. I suppose I could just create a > new > string field in my Datatable to contain the string value of the date, but > then the schema would define that field as a String rather that a Date. > Perhaps your suggestion is my only option and I'll have to also have code > to > modify the schema and code to make sure everything is in synch - yecht. > > I hope I don't sound like I'm complaining to you. I just hope someone > from > Microsoft is watching. > > Thanks again for your help. > > > Bob Scarborough > > > "Derek Harmon" <loresa***@msn.com> wrote in message > news:ujAxcIGzEHA.2804@TK2MSFTNGP15.phx.gbl... >> "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message > news:%23iSZ3g6yEHA.3408@tk2msftngp13.phx.gbl... >> > I have a Table in a Typed Dataset which contains a Date field called >> > EventDate. I've ensured that the field is defined as Date as opposed >> > to DateTime in the Typed Dataset. >> : : >> > <EventDate>2004-01-26T00:00:00.0000000-05:00</EventDate> >> > >> > which is the DateTime datatype of the W3C XML Schema Part 2: Datatypes >> > >> > I want the dates to come out as >> > >> > <EventDate>2004-01-26</EventDate> >> >> I think you'll need to use an XmlTextWriter subclass to intercept the > output >> of WriteXml( ) when it's writing these dates. Here's a XmlTextWriter to > get >> you started, >> >> - - - DsDateFilterXmlTextWriter.cs >> // . . . >> public class DsDateFilterXmlTextWriter : XmlTextWriter >> { >> private string watchElement; >> private bool onWatch; >> >> public DsDateFilterXmlTextWriter( TextWriter writer, string > watchElement) : base( writer) >> { >> this.watchElement = watchElement; >> } >> >> public override void WriteStartElement( string prefix, string > localName, string ns) >> { >> base.WriteStartElement( prefix, localName, ns); >> if ( 0 == string.Compare( this.watchElement, localName)) >> { >> onWatch = true; >> } >> } >> >> public override void WriteString( string text) >> { >> if ( onWatch ) >> { >> try >> { >> DateTime dt = DateTime.Parse( text); >> text = dt.ToString( "yyyy-MM-dd"); >> } >> catch ( FormatException ) >> { >> ; >> } >> onWatch = false; >> } >> base.WriteString( text); >> } >> } >> // . . . >> dataSet1.WriteXml( new DsDateFilterXmlTextWriter( Console.Out, > "EventDate") ); >> // . . . >> - - - >> >> The DataSet represents the value with the time zone to ensure it's > unambiguous >> what date it represents (for instance, at 11 p.m. in Chicago, the date > you've >> given is January 25, but in London, England, it's January 26). >> >> >> Derek Harmon >> >> > > Thanks for the info. It makes for interesting reading.
On the one hand, its nice to see that I'm not alone in my problems. On the other hand, its not nice to see that Microsoft doesn't have a solution. Bob Scarborough Show quote "Dino Chiesa [Microsoft]" <din***@online.microsoft.com> wrote in message news:uLOmNhMzEHA.4004@tk2msftngp13.phx.gbl... > For relevant discussion, see > http://blogs.msdn.com/brada/archive/2004/04/13/112784.aspx > > "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message > news:%23SXAbsIzEHA.576@TK2MSFTNGP14.phx.gbl... > > Thanks for the very robust reply. > > > > I understand that the DateTime format contains the time zone information. > > But there are many situations where the time zone information isn't > > appropriate and just the simple Date is necessary. The W3C recognizes > > this > > by the fact that they also define a simple Date-only format (Namely > > "Date") > > as an alternative to DateTime. > > > > I wish Microsoft would have given us some kind of property to set to > > control > > whether dates are spit out as DateTime or Date rather than forcing > > DateTime. > > In our particular application, we need to send to customers around the > > world, lists of dates indicating when bank holidays occur around the > > world. > > It doesn't make sense to have my particular time zone information (Eastern > > Standard) included in a list of bank holidays for Tokyo. > > > > The problem with your suggestion for my particular case is that I also > > want > > to be able to use the ds.WriteXmlSchema method to send my clients a > > schema > > which matches my data. So I would also have to do some fiddling with that > > to match the changes you've suggested. I suppose I could just create a > > new > > string field in my Datatable to contain the string value of the date, but > > then the schema would define that field as a String rather that a Date. > > Perhaps your suggestion is my only option and I'll have to also have code > > to > > modify the schema and code to make sure everything is in synch - yecht. > > > > I hope I don't sound like I'm complaining to you. I just hope someone > > from > > Microsoft is watching. > > > > Thanks again for your help. > > > > > > Bob Scarborough > > > > > > "Derek Harmon" <loresa***@msn.com> wrote in message > > news:ujAxcIGzEHA.2804@TK2MSFTNGP15.phx.gbl... > >> "Robert Scarborough" <r0bl0ngSpamLiquidate@hotmail.com> wrote in message > > news:%23iSZ3g6yEHA.3408@tk2msftngp13.phx.gbl... > >> > I have a Table in a Typed Dataset which contains a Date field called > >> > EventDate. I've ensured that the field is defined as Date as opposed > >> > to DateTime in the Typed Dataset. > >> : : > >> > <EventDate>2004-01-26T00:00:00.0000000-05:00</EventDate> > >> > > >> > which is the DateTime datatype of the W3C XML Schema Part 2: Datatypes > >> > > >> > I want the dates to come out as > >> > > >> > <EventDate>2004-01-26</EventDate> > >> > >> I think you'll need to use an XmlTextWriter subclass to intercept the > > output > >> of WriteXml( ) when it's writing these dates. Here's a XmlTextWriter to > > get > >> you started, > >> > >> - - - DsDateFilterXmlTextWriter.cs > >> // . . . > >> public class DsDateFilterXmlTextWriter : XmlTextWriter > >> { > >> private string watchElement; > >> private bool onWatch; > >> > >> public DsDateFilterXmlTextWriter( TextWriter writer, string > > watchElement) : base( writer) > >> { > >> this.watchElement = watchElement; > >> } > >> > >> public override void WriteStartElement( string prefix, string > > localName, string ns) > >> { > >> base.WriteStartElement( prefix, localName, ns); > >> if ( 0 == string.Compare( this.watchElement, localName)) > >> { > >> onWatch = true; > >> } > >> } > >> > >> public override void WriteString( string text) > >> { > >> if ( onWatch ) > >> { > >> try > >> { > >> DateTime dt = DateTime.Parse( text); > >> text = dt.ToString( "yyyy-MM-dd"); > >> } > >> catch ( FormatException ) > >> { > >> ; > >> } > >> onWatch = false; > >> } > >> base.WriteString( text); > >> } > >> } > >> // . . . > >> dataSet1.WriteXml( new DsDateFilterXmlTextWriter( Console.Out, > > "EventDate") ); > >> // . . . > >> - - - > >> > >> The DataSet represents the value with the time zone to ensure it's > > unambiguous > >> what date it represents (for instance, at 11 p.m. in Chicago, the date > > you've > >> given is January 25, but in London, England, it's January 26). > >> > >> > >> Derek Harmon > >> > >> > > > > > >  |
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