Solved

GridView Sorting

Posted on 2008-09-29
7
3,579 Views
Last Modified: 2013-11-08
Hi,

I am using SqlDataSource to bind data to Gridview....

i am forced to determined the query only dynamically..

so it is all done programatically...

I am having in issue with implementing a handler for sorting..

Can someone help me with a handler that works with SqlDataSource as the DataSource for GridView....

Also how can we get a DataTable from SqlDataSource
0
Comment
Question by:justin_smith
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 14

Expert Comment

by:Jai S
ID: 22603159
below is a code that i use for sorting...let me know if you need further help

DataTable dtViewData = new DataTable();
 
//this is the Sorting event of the grid view(data grid)...bind this even to you data grid...
    protected void grdView_Sorting(Object sender, GridViewSortEventArgs e)
    {
 
//this procedure call is to load you data grid ...like setting the data source etc...the code is also given below
        SearchControls();
 
        DataView dvSort = new DataView();
        dvSort = dtViewData.DefaultView;
//dtViewData is your data table - which in this case is loaded in teh function SearchControls
        string str = Convert.ToString(e.SortDirection);
        e.SortDirection = SortDirection.Ascending;
 
        ViewState.Add("SortCol", Convert.ToString(e.SortExpression));
 
        if (ViewState[e.SortExpression] != null)
        {
            if (Convert.ToString(ViewState[e.SortExpression]) == "Ascending")
            {
                e.SortDirection = SortDirection.Descending;
                ViewState[e.SortExpression] = "Desending";
                dvSort.Sort = e.SortExpression + " DESC";
            }
            else
            {
                e.SortDirection = SortDirection.Ascending;
                ViewState[e.SortExpression] = "Ascending";
                dvSort.Sort = e.SortExpression + " ASC";
            }
        }
        else
        { ViewState.Add(Convert.ToString(e.SortExpression), "Ascending"); dvSort.Sort = e.SortExpression + " ASC"; }
 
        grdView.DataSource = dvSort;
        grdView.DataBind();
 
 
    }
private void SearchControls(string sort)
{
        dtViewData = new DataTable();
 
        ssql = "your dynamic sql code goes here...";
        dtViewData = objDb.GetDataTable(CommandType.Text, ssql);
 
}

Open in new window

0
 

Author Comment

by:justin_smith
ID: 22603173
I will have to implement this way if nothing works..(cos i have to rewrite what i have do so far)
 but...

I am with you in use of DataView.

please let me know if this can be done..

1)Can i get DataView / DataTable object from GridView.DataSource
2)I am pretty sure this could be easily done if i initially used DataTable instead of SqlDataSource object



0
 
LVL 14

Expert Comment

by:Jai S
ID: 22603180
i think you can...

use it this way....

DataTable dt = (DataTable)YourGridViewName.DataSource;

Open in new window

0
Is Your DevOps Pipeline Leaking?

Is your CI/CD pipeline a hodge-podge of randomly connected tools? You’ve likely got a tool to fix one problem & then a different tool to fix another, resulting in a cluster of tools with overlapping functionality. Learn how to optimize your pipeline with Gartner's recommendations

 

Author Comment

by:justin_smith
ID: 22603187
this is what i get

Unable to cast object of type 'System.Web.UI.WebControls.SqlDataSource' to type 'System.Data.DataTable'.
0
 
LVL 14

Expert Comment

by:Jai S
ID: 22603208
Since you are assigning a SqlDataSource you probably might not be able to cast it directly...here is a link that might be helpful
http://www.developersdex.com/asp/message.asp?p=1116&r=6178158

if you can share your code i will look at it...
0
 

Accepted Solution

by:
justin_smith earned 0 total points
ID: 22603224
Hi Ganesh,

works now....in case someone wants to a helping hand.....

  SqlDataSource  ds= (SqlDataSource)  gv_RevenueReport.DataSource;
        DataView view = (DataView)ds.Select(new DataSourceSelectArguments());

                    view.Sort = e.SortExpression + " " +" DESC";

                    gv_RevenueReport.DataSource = view;
                    gv_RevenueReport.DataBind();



0
 
LVL 14

Expert Comment

by:Jai S
ID: 22603235
i am also using dynamic loading of a gridview wherein my query changes for each screen and my internal datagrid loading dynamically...i managed to achieve the loading time (15 records per view) in less than  a second for tables with more than a 100 thousand records....
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question