gridview searching problem

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I have a gridview in my project and i have a datasource
Let us say Gridview ID is Gridview1
Sqldatasourse is SqlDataSource1
I have a Table Like below

Table Name:StudentInfo

UserId	UserName	FirstName	LastName	City		Designation
1	krishna		krishna		reddy		Hyderabad	Developer
2	Mohan		Mohan Prasad	Kumar		Hyderabad	Developer
3	Naresh		Naresh Kumar	Naresh Babu	Hyderabad	Designer

I have a query in SqlDatasource1 as SELECT *FROM StudentInfo

I have a DropdownListUserName
in DropDownList UserNames are Krishna,mohan,Naresh

when i select krishna it has to show krishna row
when i select mohan it has to show mohan row
like that

For the i used Where clause in ConfigDatasource but the problem when the page is loaded it filters the table automatically i dont
want like that when i select the username manually then only it has to work
how to do that

Posted 12-Sep-11 22:14pm

krishna_goluguri

Updated 12-Sep-11 22:36pm

Prerak Patel

v2

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Prerak Patel 13-Sep-11 4:36am

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PappuKumarMishra · Answer 1 · 2011-09-12T23:07:00

Hello Prerak i am telling you the steps.
1.use one method say SearchStudent(ddlStudent.SelectedItem.ToString())
You can use this one like that-
gvStudentInfo.DataSource=SearchStudent(ddlStudent.SelectedItem.ToString());

then inside methods u can write

public static List<studentinfo> SearchStudent(string name)
{
List<studentinfo>studentInfo;
var searchExpression = PredicateBuilder.Make<studentinfo>(u=> u.UserId> 0);
if (!string.IsNullOrEmpty(SearchValue.Trim()))
{
switch (name)
case "name":
searchExpression = searchExpression.And(n=>n.UserName.StartsWith(SearchValue.Trim()) );
break;
}
return studentInfo.OrderByDescending(u=>u.UserID).ToList();
}
you can go for above method also.. if you want more simple then inform me. i will go for simplest way.

Herman<T>.Instance · Answer 2 · 2011-09-12T22:38:00

Solution 1

If you attach the GridView to a DataView and attach your sqldatasource to the DataView you can use Filter options (kind of search)

Posted 12-Sep-11 22:38pm

Herman<T>.Instance