Questions on DataGridView and XML File as Data Source

[Stewart Berman]

I have an application that populates a DataGridView control with an XML file:
private void Form1_Load(obje ct sender, EventArgs e)
{
dataGridView1.D ataSource = gridDataSet;
gridDataSet.Rea dXml("E:\\Image Control.xml");
dataGridView1.D ataMember = "Images";
dataGridView1.A utoSizeColumnsM ode = DataGridViewAut oSizeColumnsMod e.Fill;
dataGridView1.C olumnHeadersVis ible = true;
dataGridView1.C olumns.GetFirst Column(DataGrid ViewElementStat es.Visible).Vis ible = false;
dataGridView1.A llowUserToAddRo ws = false;
dataGridView1.A llowUserToDelet eRows = false;
}

The interface has an Add and a Delete button for adding and deleting entries.

How do I setup the XML file so the grid only shows the headers?
The schema is:
<?xml version="1.0" standalone="yes " ?>
<xs:schema id="DataSet1" targetNamespace ="http://www.tempuri.org/DataSet1.xsd"
xmlns:mstns="ht tp://www.tempuri.org/DataSet1.xsd"
xmlns="http://www.tempuri.org/DataSet1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:msdata="u rn:schemas-microsoft-com:xml-msdata" attributeFormDe fault="qualifie d"
elementFormDefa ult="qualified" >
<xs:element name="DataSet1" msdata:IsDataSe t="true">
<xs:complexType >
<xs:choice maxOccurs="unbo unded">
<xs:element name="Images" minOccurs="0" >
<xs:complexType >
<xs:sequence>
<xs:element name="Sequence"
msdata:AutoIncr ement="true" type="xs:int" />
<xs:element name="Name" type="xs:string "
minOccurs="0" />
<xs:element name="Location" type="xs:string "
minOccurs="0" />
<xs:element name="Style" type="xs:string "
minOccurs="0" />
<xs:element name="Duration" type="xs:int"
minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>

The initial XML file has:
<?xml version="1.0" encoding="utf-8"?>
<DataSet1 xmlns="http://www.tempuri.org/DataSet1.xsd">
<!--SABBackgroundSl ideShow Image Conrol-->
<Images>
<Sequence></Sequence>
<Name></Name>
<Location></Location>
<Style></Style>
<Duration></Duration>
</Images>
</DataSet1>

When the application opens the grid shows the headers and a row of empty cells. If I delete the
<Imagessectio n. The system complains that it cannot find the table. If I delete just the children
un Images the system complains that there aren't any child entries defined.

So how do I stop the empty row from displaying?

[Zhi-Xin Ye [MSFT]]

RE: Questions on DataGridView and XML File as Data Source

Hello Stewart,

Thank you for using Microsoft Managed Newsgroup Service. My name is Zhi-Xin
Ye, it's my pleasure to work with you on this issue.

To show only the headers in the DataGridView, you can call the
DataSet.ReadXml Schema() method instead. For example:

gridDataSet.Rea dXmlSchema("E:\ \ImageControl.x ml");

Please try my suggestion and let me know the result.

Have a splendid day!

Sincerely,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg@microsof t.com.

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[Stewart Berman]

Re: Questions on DataGridView and XML File as Data Source

>To show only the headers in the DataGridView, you can call the

>DataSet.ReadXm lSchema() method instead. For example:
>
>gridDataSet.Re adXmlSchema("E: \\ImageControl. xml");

Actual the solution was as follows:
Starting with an empty XML filet:
<?xml version="1.0" standalone="yes "?>
<DataSet1 xmlns="http://www.tempuri.org/DataSet1.xsd">
</DataSet1>

In the form load event:
// Configure the DataGridView control
dataGridView1.D ataSource = gridDataSet;
gridDataSet.Rea dXmlSchema("E:\ \DataSet1.xsd") ; // Loads the schema
gridDataSet.Rea dXml("E:\\Image Control.xml"); // Loads 0 or more records
dataGridView1.D ataMember = "Images"; // Identifies the table
// Grid formatting
dataGridView1.A utoSizeColumnsM ode = DataGridViewAut oSizeColumnsMod e.Fill;
dataGridView1.C olumnHeadersVis ible = true;
// Hide the column containing the sequence number
dataGridView1.C olumns.GetFirst Column(DataGrid ViewElementStat es.Visible).Vis ible = false;

It is necessary to read the schema from the DataSet1.xsd file not the Images.xml file. This should
always be done anyway as it assigns the field attributes. For example the Sequence field is
supposed to have the AutoIncrement attribute. If you don't read the schema from the DataSet1.xsd
file it doesn't have that attribute.


v-zhye@online.mic rosoft.com (Zhi-Xin Ye [MSFT]) wrote:

>Hello Stewart,
>
>Thank you for using Microsoft Managed Newsgroup Service. My name is Zhi-Xin
>Ye, it's my pleasure to work with you on this issue.
>
>To show only the headers in the DataGridView, you can call the
>DataSet.ReadXm lSchema() method instead. For example:
>
>gridDataSet.Re adXmlSchema("E: \\ImageControl. xml");
>
>Please try my suggestion and let me know the result.
>
>Have a splendid day!
>
>Sincerely,
>Zhi-Xin Ye
>Microsoft Managed Newsgroup Support Team
>
>Delighting our customers is our #1 priority. We welcome your comments and
>suggestions about how we can improve the support we provide to you. Please
>feel free to let my manager know what you think of the level of service
>provided. You can send feedback directly to my manager at:
>msdnmg@microso ft.com.
>
>============== =============== =============== ======
>Get notification to my posts through email? Please refer to
>http://msdn.microsoft.com/en-us/subs...#notifications.
>
>Note: MSDN Managed Newsgroup support offering is for non-urgent issues
>where an initial response from the community or a Microsoft Support
>Engineer within 2 business day is acceptable. Please note that each follow
>up response may take approximately 2 business days as the support
>professional working with you may need further investigation to reach the
>most efficient resolution. The offering is not appropriate for situations
>that require urgent, real-time or phone-based interactions. Issues of this
>nature are best handled working with a dedicated Microsoft Support Engineer
>by contacting Microsoft Customer Support Services (CSS) at
>http://msdn.microsoft.com/en-us/subs.../aa948874.aspx
>============== =============== =============== ======
>This posting is provided "AS IS" with no warranties, and confers no rights.

[Zhi-Xin Ye [MSFT]]

Re: Questions on DataGridView and XML File as Data Source

Hi Stewart,

Yes, it necessary to call the ReadXmlSchema() method to read the schema.
And do you need further help on this issue? Please let me know if there is
anything I can do to help you.

Best Regards,
Zhi-Xin Ye
Microsoft Managed Newsgroup Support Team

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg@microsof t.com.

This posting is provided "AS IS" with no warranties, and confers no rights.