Restricting data

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Don - 30 May 2008 14:56 GMT

Hi

I am trying to put value restrictions on certain elements in an xml file
using a schema file.
The syntax in my schema file looks like the following

<xs:element name="AXYZMachines" msdata:IsDataSet="true"
msdata:UseCurrentLocale="true">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="MotionParameters">
<xs:complexType>
<xs:sequence>
<xs:element name="FeedRateMAX" type="xs:double">
            <xs:restriction base="xs:double">
                <xs:minInclusive value="0"/>
                <xs:maxInclusive value="1000"/>
            </xs:restriction>
     </xs:element>
<xs:element name="PlungeRateMAX" type="xs:string"
minOccurs="0" />
<xs:element name="TravelRateMAX" type="xs:string"
minOccurs="0" />
<xs:element name="TravelRate" type="xs:string" minOccurs="0" />
<xs:element name="PlungeRate" type="xs:string" minOccurs="0" />
<xs:element name="FeedRate" type="xs:string" minOccurs="0" />
<xs:element name="JogSpeedMode" type="xs:string" minOccurs="0"
/>
<xs:element name="SeekXYSpeed" type="xs:string" minOccurs="0" />
<xs:element name="SeekZSpeed" type="xs:string" minOccurs="0" />
<xs:element name="JerkGrate" type="xs:string" minOccurs="0" />
<xs:element name="AccelerationG" type="xs:string"
minOccurs="0" />
<xs:element name="AccelMAX" type="xs:string" minOccurs="0" />
<xs:element name="JerkMAX" type="xs:string" minOccurs="0" />
<xs:element name="CentripetalG" type="xs:string" minOccurs="0"
/>
<xs:element name="BrakeG" type="xs:string" minOccurs="0" />
<xs:element name="ArcError" type="xs:string" minOccurs="0" />
<xs:element name="MinLength" type="xs:string" minOccurs="0" />
<xs:element name="CornerPause" type="xs:string" minOccurs="0" />
<xs:element name="StartPause" type="xs:string" minOccurs="0" />
<xs:element name="JerkFactor" type="xs:string" minOccurs="0" />
<xs:element name="CentripetalAcceleration" type="xs:string"
minOccurs="0" />
<xs:element name="LinearAcceleration" type="xs:string"
minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>

I also have the following C# code that reads the schema in

dsMachineParameters = new DataSet("MachineParameters");
dsMachineParameters.ReadXmlSchema("SchemaA.xsd");

I get the following exception from my C# code:

The 'http/://www.w3.org/2001/XMLSchema:restriction' element is not supported
in this context. How can I add restrictions ranges on values?

Signature

Don

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Martin Honnen - 30 May 2008 16:08 GMT

> <xs:element name="FeedRateMAX" type="xs:double">
>             <xs:restriction base="xs:double">
>                 <xs:minInclusive value="0"/>
>                 <xs:maxInclusive value="1000"/>
>             </xs:restriction>
>     </xs:element>

I think you need
<xs:element name="FeedRateMAX">
<xs:simpleType>
<xs:restriction base="xs:double">

Signature

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

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Don - 30 May 2008 16:44 GMT

I tried the following:
<xs:element name="FeedRateMAX" type="xs:double">
<xs:simpleType>
            <xs:restriction base="xs:double">
                <xs:minInclusive value="0"/>
                <xs:maxInclusive value="1000"/>
            </xs:restriction>
</xs:simpleType>
    </xs:element>

and get the following exceptiion:
The type attribute cannot be present with either simpleType or complexType

Signature

Don

> > <xs:element name="FeedRateMAX" type="xs:double">
> > <xs:restriction base="xs:double">
[quoted text clipped - 7 lines]
> <xs:simpleType>
> <xs:restriction base="xs:double">

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Martin Honnen - 30 May 2008 16:50 GMT

> I tried the following:
> <xs:element name="FeedRateMAX" type="xs:double">
[quoted text clipped - 8 lines]
> and get the following exceptiion:
> The type attribute cannot be present with either simpleType or complexType

Well that is not what I suggested, drop the type="xs:double" from the
xs:element.

Signature

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

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Don - 30 May 2008 17:16 GMT

Hi Martin,

Thanks for your input. The exception does not happen anymore but now when I
load the a datagrid using the following

dsMachineParameters = new DataSet("MachineParameters");
mydatagrid = new DataGrid();
mydatagrid.DataSource = dsMachineParameters;
dataGridView1.Controls.Add(mydatagrid);

I am still allowed to change the value to something greater than 1000. This
is not what I expected?

Signature

Don

> > I tried the following:
> > <xs:element name="FeedRateMAX" type="xs:double">
[quoted text clipped - 11 lines]
> Well that is not what I suggested, drop the type="xs:double" from the
> xs:element.

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Martin Honnen - 30 May 2008 17:42 GMT

> Thanks for your input. The exception does not happen anymore but now when I
> load the a datagrid using the following
[quoted text clipped - 6 lines]
> I am still allowed to change the value to something greater than 1000. This
> is not what I expected?

I think in terms of the W3C XML schema language you have the right type
definition now. I don't know however whether such restrictions in a
schema are enforced by DataSets or DataGridViews. I did a quick test
here and it indeed looks as if the DataSet does not enforce such
restrictions like minInclusive or maxInclusive. I am not sure how to
change that. You might want to ask in an ADO.NET group.

Signature

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

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