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Upload XML File to ASP.net Page, Bind Specific Node to GridView (C#)

I am trying to create an ASP.net/C# web page that contains a GridView, and the ability for a user to upload an XML file to that page and bind the grid to a node in that XML. The XML file must be read into memory--not saved to the server first--which has prevented me from modelling this on many online examples which presume an uploaded file is physically sitting on the server when it’s accessed.
The simplified test XML file looks like this, and I do have some latitude to alter or expand it if necessary:
<?xml version="1.0" encoding="utf-8" ?>
<root>
<Grids>
<Grid name="GridView">
<item>
<Uno>1A</Uno>
<Dos>1B</Dos>
<Tres>1C</Tres>
</item>
<item>
<Uno>2A</Uno>
<Dos>2B</Dos>
<Tres>2C</Tres>
</item>
<item>
<Uno>3A</Uno>
<Dos>3B</Dos>
<Tres>3C</Tres>
</item>
<item>
<Uno>4A</Uno>
<Dos>4B</Dos>
<Tres>4C</Tres>
</item>
</Grid>
</Grids>
</root>
The client needs to be able to click on a FileUpload control, browse to a local XML file, and have the grid reflect the data in the node named "GridView" above. I can’t figure out how to extract just that node from the XML data. If I create a cut-down, poorly formed XML file with that node as the root, it works, but I don’t want to do that as I plan on expanding this in the future.
Below is the salient portion of the ‘import’ code I have at the moment. It’s not optimal – I got here through trial and error so there’s probably a lot of garbage in here. When I run this, I get a single-cell grid that just contains the text “Grid_Id” rather than the tabular data I need (although even that’s broken at the moment).
protected void btnImport_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
string fileExt = System.IO.Path.GetExtension(FileUpload1.FileName);
if (fileExt == ".xml")
{
using (MemoryStream stream = new MemoryStream(FileUpload1.FileBytes)) // Using FileBytes because I can’t save file to server
{
XmlDocument document = new XmlDocument();
document.Load(stream);
stream.Position = 0;
string xmlFile;
using (StreamReader inputStreamReader = new StreamReader(FileUpload1.PostedFile.InputStream))
{
xmlFile = inputStreamReader.ReadToEnd();
}
XmlTextReader reader = new XmlTextReader(new StringReader(xmlFile));
DataSet dataSet = new DataSet();
dataSet.ReadXml(reader);
//gv1.DataSource = dataSet.Tables[“GridView”]; // Doesn’t work
gv1.DataSource = dataSet.Tables[0];
gv1.DataBind();
}
}
}
}
Ultimately I’d like to create a more generic component that will allow us to any save grid data to a user’s desktop and push that ‘snapshot’ back in to the grid at a later date. Thanks in advance for any guidance (this is my first post)!

How to Read XML into a DataSet

I have a class that goes to a URL and gets a xml document using xmlDoc.Load(URL). To test the class, I added a web project to display the xml in a grid view.
In a button click I create an instance of an xml document and populate it as:
xmlDoc = myClassName()
I'm stuck at how to get xmlDoc into a format usable by the datasource
I am totally confused as to how to get the xml to be displayed in the grid as dataset.ReadXml seems to want a file path. I don't understand the other overloads. I suppose I have to read the xml into a string or something else, but I don't understand how to do this - even after reading numerous posts here and MSDN - Thanks!

Example:
string xml =#"<xml><customer><id>1</id></customer></xml>";
DataSet ds = new DataSet();
ds.ReadXml(XmlReader.Create(new StringReader(xml)));
Now set the datasource to your grid:
grid.DataSource=newDataSet.Tables[0];
Update:
DataSet ds = new DataSet();
//xmlDocument is your XmlDocument instance
ds.ReadXml(XmlReader.Create(new StringReader(xmlDocument.InnerXml)));
grid.DataSource=newDataSet.Tables[0];

How to use a text file containing a list of words as a drop down menu for html?

I am trying to create a drop down menu in an ASP.NET using a text file as the list elements. I want to create the menu from the text file so I can easily add or delete different options without adding the ASP.NET source code. Also, how could I store new options as variables in ASP.NET when more options are added to the text file? My code-behind is c#.
Thanks all,
Stephen

you can do this several ways.. lets say you have a file with a list of items named menuItems.txt you could do something like this
if the list were like this for example
Open
SaveAs
Save
Exit ....ect you get the drift
List<string> lstMenuItems =
new List<string>(File.ReadAllLines(strFilePath+ menuItems.txt));//make this a variable.
this will read all the items in a list and then from there you could Create the MenuItem object and load the ites from the lstMenuItems

If you haven't actually created the text file yet, I would suggest creating an XML text file for this, then using LINQ to XML to pull the values out, and bind them to your dropdown.
Search on those keywords to find the details on how to do those things.
your XML file might look like this:
<?xml version="1.0"?>
<dropDownValues>
<entry>
<text>Dog</text>
<value>1</value>
</entry>
<entry>
<text>Cat</text>
<value>2</value>
</entry>
<entry>
<text>Canary</text>
<value>3</value>
</entry>
</dropDownValues>
Then query the data like this:
var xDoc = XDocument.Load(pathToXmlDocument);
// Return an "anonymous" type that represents your XML document:
var dropDownValues = xDoc.Descendants("entry")
.Select(x => new
{
Text = x.Element("text").Value,
Value = x.Element("value").Value
});
Then bind to your drop down:
myDropDown.DataSource = dropDownValues;
myDropDown.DataTextField = "Text";
myDropDown.DataValueField = "Value";
myDropDown.DataBind();

read contents of a xml file into a data grid view

Im using c# .net , windows form application. I have a XML file which contains two columns and some rows of data. now i have to fill this data into a data grid view. im using a button, when i click on the button an open dialog box will appear. i have to select the xml file name and when i click on open the contents of that xml file should come to the data grid view. i have tried with the following code:
{
XmlDataDocument xmlDatadoc=new XmlDataDocument();
XmlDatadoc.Dataset.ReadXml(filename);
ds=xmlDatadoc.Dataset;
datagridview1.DataSource=ds.DefaultViewManager;
datagridview1.Datamember="language";
}
My xml file is:
<languages>
<language>
<key> key1</key>
<value>value1</value>
</language>
<language>
<key> key2</key>
<value>value2</value>
</language>
</languages>
Its working fine but only for "language" . I need it to work file other xml files also.

This one's pretty simple: if you want to use this with a different XML file, use a different Datamember property, like so:
datagridview1.Datamember="taxes"; // or whatever
If you're expecting your DataGridView to somehow magically know what elements in your XML to use for rows, you're out of luck.

Hello i this is example, xml must be in correct format, its easy to correct code if needed, that's just the main gist of idea:
XElement xElement = XElement.Load("file.xml");
DataTable dTable = new DataTable();
// keys must have unique name
xElement.Elements().First().Elements().ToList()
.ForEach(element=>dTable.Columns.Add(element.Name.ToString()));
xElement.Elements().ToList().ForEach((item) =>
{
// fileds must place in the same order
// but you can correct it if you want
var itemToAdd = new List<string>();
item.Elements().ToList().ForEach(field => itemToAdd.Add(field.Value));
dTable.Rows.Add(itemToAdd.ToArray());
}
);
dataGridView1.DataSource = dTable;

C# WinForms Read XML File - Only Specific Nodes

I have an XML File:
<Database>
<SMS>
<Number>+447761692278</Number>
<DateTime>2009-07-27T15:20:32</DateTime>
<Message>Yes</Message>
<FollowedUpBy>Unassigned</FollowedUpBy>
<Outcome></Outcome>
<Quantity>0</Quantity>
<Points>0</Points>
</SMS>
<SMS>
<Number>+447706583066</Number>
<DateTime>2009-07-27T15:19:16</DateTime>
<Message>STOP</Message>
<FollowedUpBy>Unassigned</FollowedUpBy>
<Outcome></Outcome>
<Quantity>0</Quantity>
<Points>0</Points>
</SMS>
</Database>
Currently I read it into a datagridview using this:
public void Read()
{
DataSet ds = new DataSet("SMS DataSet");
XmlDataDocument xmlDatadoc = new XmlDataDocument();
xmlDatadoc.DataSet.ReadXml(#"C:\Documents and Settings\Administrator\Desktop\RecSmsDB.xml");
ds = xmlDatadoc.DataSet;
this.dataGridView1.DataSource = ds;
this.dataGridView1.DataMember = "SMS";
this.dataGridView1.Sort(dataGridView1.Columns["DateTime"], ListSortDirection.Descending);
}
I want to be able to only read in the xml objects that have a specific DateTime. Does anyone know of a way of doing this? Currently I have tried a variety of the methods included in the namespace but to no avail.
Help greatly appreciated,
regards.
***EDIT: I want to be able to dynamically change the data displayed at run time.

Not that I can think of. However, you can read all the data into the DataSet, then create a DataView which filters the SMS table, and bind your grid to that instead of the DataTable.

What if you attach the DataSet to a BindingSource and attach this BindingSource to the grid? A BindingSource has a Filter property where you can enter SQL-like expressions.