Client Side events and Server side binding
I want to filter a dataset, server side and bind it to a select control. Problem is my filtering must be done based on the text written by the user in a text input. To get this text i'm using client side keyboard events.
I tried to use client side binding and it works fine, but the problem is my dataset has more than 10000 rows, and so the performance is awful. Only thing i can do i think is to rebind the select control to a filtered dataset, improving performance. This is my code at the moment:
In the aspx:
static
HtmlSelect _control = null;[
WebMethod(EnableSession = true)] public static void SetData(DataTable result){
HtmlSelect control = _control;control.DataSource = result.DataSet;
control.DataMember =
"campaigns";control.DataTextField =
"name";control.DataValueField =
"id_campaign";control.DataBind();
}
JavaScript:
function
Filtering(textBox){
FilterData.GetData(textBox.value, OnDataRequestComplete);
}
function OnDataRequestComplete(result)
{
PageMethods.SetData(result); var RsltElem = document.getElementById("Results");RsltElem.innerHTML =
"Done";}
In The WebService FilterData:
[
WebMethod(EnableSession = true)] public DataTable GetData(string filter){
DataSet ds1 = new DataSet(); DataSet result = new DataSet(); if (Session != null && Session["DataSet"] != null)ds1 = (
DataSet)Session["DataSet"]; else{
ds1.ReadXml(
"c:\\t.xml", XmlReadMode.InferSchema);Session[
"DataSet"] = ds1;}
if (String.IsNullOrEmpty(filter))filter =
String.Empty; DataRow[] rows = ds1.Tables[0].Select("name LIKE '*" + filter + "*'", "name asc");result.Merge(rows);
return result.Tables[0];}
I have a javascript exception "PageMethods is not defined" can anyone help me with this one? Thanks
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rumbafum
11/7/2006 6:18:12 PM
asp.net.networking-webservices
2181 articles. 
0 followers.
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