Want to use filter expression to search the data from gridview

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I have the tableVDC with 4000 records and its displayed in aspx page in a grid view.
I have also added the textbox to search the VDC and the search button. Now, I want to search the data from the grid when user input some text in the textbox and press search button. I am not able to do so, any suggestions would be appreciated.

Posted 16-Sep-13 22:35pm

Adrishya

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Thanks7872 17-Sep-13 5:03am

If many others can,why can't you? Can you explain this line: I am not able to do so

Adrishya 18-Sep-13 0:51am

Mr. Rohan,

The statement I am not able to do so means, I am the beginner in programming and I tried to do it in many methods, but not able to solve the solution.

Thanks7872 18-Sep-13 0:55am

Than you are suppose to show that "many methods". So that some one can correct it.

Adrishya 18-Sep-13 1:13am

MEthod 1

odsVDC.FilterExpression = "";
if (txtSearchText.Text != "")
{
switch (ddlSearchBy.SelectedValue)
{
case "VDC":
odsUser.FilterExpression = ddlSearchBy.SelectedValue + " like '" + txtSearchText.Text + "%'";
break;

}
}
grdVDC.DataBind();
ToolkitScriptManager scriptManagerRIS = (ToolkitScriptManager)Utils.SuperBaseMaster.FindControl(this.Master, "ScriptManagerRIS");
scriptManagerRIS.SetFocus(txtSearchText);

Method 2

var searchTag = txtboxVDC.Text;

CSycVDC cVDC = new CSycZone(HttpContext.Current.Request.RawUrl);

if (txtboxVDC.Text != "")
{

List lst = czone.GetAll();
var lst1 = from p in lst.Where(p=>p.Zone.Contains(searchTag)) select p;
GridView1.DataSource = lst1;
GridView1.DataBind();

}

DO you need more example what I did or this are enough ?

Thanks7872 18-Sep-13 1:27am

Use improve question widget in your question and put this code there to make it more readable.

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Marvin Ma · Answer 1 · 2013-09-16T23:04:00

You could use a simple LINQ expression:

First you should try to get the text you typed in your TextBox by defining a variable or a public property.

E.g.

C#

var searchTag = TextBox.Text;

or

C#

private string searchTag
public string SearchTag
{
   get{return this.searchTag;}
   set{this.searchTag = value;}
}

And then, create a query to find the matched entries in your table
E.g.

C#

var searchResults = from r in tableVDC where r.Contains("searchTag") select r;

Hope this helps.