Question

I’m setting up a simple page that just displays the contents of an XML file and allows the user to filter by keyword.

I’m a serious .NET newb, but I’ve got an XmlDataSource set up:

<asp:XmlDataSource ID='RSSFeedDataSource' runat='server'  DataFile='test.xml'         XPath='/rss/channel/item[contains(title,'theKeyword')]'></asp:XmlDataSource> 

So I want to allow users to type in a keyword and change the data source based on that.

I figured I’d do a postback with the keyword from a text input, grab that keyword and somehow insert into the XPath expression…

I’m going for simplicity at this point, but would this be the simplest approach for this?

Answer 1

Method to grab it via code behind and a button postback

ASP Page:

<asp:TextBox id='txtKeyword' runat='server' /> <asp:Button id='btnKeyword' OnClick='btnKeyword_Click' runat='server' /> 

Code behind:

public void btnKeyword_Click(Object sender, EventArgs e) {   // Assuming C#   // Retrieve the keyword from the text box   string keyword = txtKeyword.Text    // Next step would be to modify the XPath of your XmlDataSource   RSSFeedDataSource.XPath = '/rss/channel/item[contains(title,' + keyword + ')]' }