Hi all,

I want to populate the ddl without postback to the server. Suppose there are 2 dropdownlists. The second ddl population depends on the selected item of first one. So when we select an item from first ddl, it should populate the desired values in second ddl without postback ...............

can any one help me ?

Thanks
KiruthikaSambandam

hi

It is possible using Ajax.

Or

you should have store all the values in the hidden field or some where else in the page and retrieve it through java script and load it in the client side itself.

this is my suggestion not the resolution for your problem

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''''''Rajesh''''''
Ants. . . . . . Like me

Hi,
No need to go for ajax.U just generate XML file and retrieve data from that file.so that u can avoid full page refresh but partial refreshment s there.

Hi,
See the following example.
My need is to get the state list in one DropDownlist according to the country name in another DropDownlist.
Consider My xml(countryContent.xml) like this,
<xml>
<country Name="US">
<state countryId="1" stateName="ottawa" />
<state countryId="1" stateName="SovietUnion" />
<state countryId="1" stateName="u" />
<state countryId="1" stateName="UUU " />
</country>
<country Name="India">
<state countryId="2" stateName="Agra" />
<state countryId="2" stateName="AndraPradesh" />
<state countryId="2" stateName="Kerala" />
<state countryId="2" stateName="Maharastra" />
<state countryId="2" stateName="Mumbai" />
<state countryId="2" stateName="TamilNadu" />
<state countryId="2" stateName="U.P" />
</country>
</xml>

In PageLoad,write the following coding
protected void Page_load(object sender,EventArgs e)
{
DataTable dataTable = new DataTable();
DataRow dr;
dataTable.Columns.Add("countryName", typeof(string));
if (!IsPostBack)
{
XmlDocument xdoc = new XmlDocument();
XmlTextReader xtr = new XmlTextReader(Server.MapPath("countryContent.xml") );
xdoc.Load(xtr);
XmlNodeList xnl = xdoc.DocumentElement.SelectNodes("country");
foreach (XmlNode xnode in xnl)
{
dr = dataTable.NewRow();
dr[0] = xnode.Attributes[0].Value;
dataTable.Rows.Add(dr);
}
countryDropDownList.DataSource = dataTable;
countryDropDownList.DataValueField = "countryName";
countryDropDownList.DataBind();
}
}
Like this, write the coding for state DropDownlist.
This will avoid page refresh

ASP.NET pages, known officially as "web forms", are the main building block for application development.
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