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Gridview Custom Paging with SQL Server 2000

Posted on 2009-04-06
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Last Modified: 2012-05-06
I need to know how to setup custom sorting / paging with gridviews for large datasets with .NET 2.0, C# and SQL Server 2000. My current method for general SQL SELECT queries is below and does not have anything I need for custom paging, but I'd like to adapt what I have to work.

I am new to n-tier (presentation / BLL / DAL) and am not using that in this example unless it'd be easier to do.


<asp:ObjectDataSource ID="ObjDataSource1" runat="server" TypeName="SomeClass" SelectMethod="rtnDataSet">
        <SelectParameters>
            <asp:Parameter DefaultValue="Select * from employees" Name="_sqlStr" />
        </SelectParameters>
    </asp:ObjectDataSource> 
 
 
    public DataSet rtnDataSet(string _sqlStr)
    {
        DataSet _rtnDS = new DataSet();
        dataRetrieval.fillDataSet(ref _rtnDS, ref _sqlStr);
	return _rtnDS;
    }
 
 
    public static void fillDataSet(ref DataSet _dataSet, ref string _sqlStr)
    {
            SqlConnection _sqlCon = connectToSomeDB();
            SqlCommand _sqlCmd = new SqlCommand();
 
            _sqlCmd.Connection = _sqlCon;
            _sqlCmd.CommandType = CommandType.Text;
            _sqlCmd.CommandTimeout = 30;
            _sqlCmd.CommandText = _sqlStr;
 
            SqlDataAdapter _sqlAdptr = new SqlDataAdapter(_sqlCmd);
            _sqlAdptr.Fill(_dataSet);
 
            _sqlAdptr.Dispose();
            _sqlCmd.Dispose();
            _sqlCon.Close();
    }

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Question by:devo00
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6 Comments
 
LVL 27

Expert Comment

by:nmarun
ID: 24081661
This is a duplicate question from:
http://www.experts-exchange.com/Programming/Languages/C_Sharp/Q_24299766.html

Please close this ticket.
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Author Comment

by:devo00
ID: 24083440
No, this is not a duplicate ticket. One is SQL Server 2000 and one is 2005.
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LVL 27

Expert Comment

by:nmarun
ID: 24083937
Have you looked at using a SqlDataSource instead?
http://msdn.microsoft.com/en-us/library/dz12d98w.aspx
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Expert Comment

by:Anurag Thakur
ID: 24084177
here are a few recommendation for sql server 2000
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=33472&SearchTerms=paging
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Author Comment

by:devo00
ID: 24086967
nmarun: When I say custom sorting / paging, I'm speaking of large datasets being paged and sorted. With the SQLDataSource, every time you sort or page, the entire resultset is returned and a portion is displayed or re-ordered. For this you need the ObjectDataSource. This is definitely not a help to get the built-in .NET sorting and paging functions inherent to gridviews and SqlDataSources.
-I need to only  a specific 10-15 record 'section' of the resultset returned for paging.
I've been through all the online versions and mostlyfind things that don't apply using the method I have above, only a way to start from scratch.
I need a simple step by step to change what I have to get custom sorting / paging working. For anyone that has done this before, I would think this would not be too difficult.
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Accepted Solution

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devo00 earned 0 total points
ID: 24101560
This answered my question for Custom Paging and I have it working now (procedure at bottom):  http://www.4guysfromrolla.com/webtech/042606-1.shtml

---------------------------
Gridview and ObjectDataSource:
    <asp:ObjectDataSource ID="o1" runat="server" 
    TypeName="TestTier" 
    SelectMethod="BindUsers" 
    SelectCountMethod="GetOrderCount"
    StartRowIndexParameterName="startRowIndex" 
    MaximumRowsParameterName="maximumRows"
    EnablePaging="true" 
    ></asp:ObjectDataSource>
 
<asp:GridView runat="server" ID="gv3" DataSourceID="o1" AllowPaging="true" PageSize="15" AllowSorting="true"></asp:GridView>
 
---------------------------
Stored Procedures:
CREATE  PROCEDURE [dbo].[GetTestData] 
(
    @startRowIndex int,
    @maximumRows int
)
AS
 
DECLARE @first_id int, @startRow int
	
SET ROWCOUNT @startRowIndex
SELECT @first_id = OrderID FROM [Order Details] ORDER BY OrderId
 
SET ROWCOUNT @maximumRows
Select * from [Order Details] where OrderId >= @first_id
 
SET ROWCOUNT 0
GO
 
CREATE PROCEDURE dbo.GetOrderCount
AS
    SELECT  count(*)  FROM [Order Details]
GO
 
---------------------------
Data Access Class:
public class TestTier
{
 
    public DataSet BindUsers(int startRowIndex, int maximumRows, string sortBy)
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["testcon_north"].ConnectionString);        
        SqlCommand com = new SqlCommand("GetTestData", con);
        com.CommandType = CommandType.StoredProcedure;
        com.Parameters.Add("@startRowIndex", SqlDbType.Int, 4).Value = startRowIndex;
        com.Parameters.Add("@maximumRows", SqlDbType.Int, 4).Value = maximumRows;
        com.Parameters.Add("@sortBy",SqlDbType.VarChar).Value = sortBy;
        SqlDataAdapter ada = new SqlDataAdapter(com);
        DataSet ds = new DataSet();
        ada.Fill(ds);
        return ds;   
    }
 
    public int GetOrderCount()
    {
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["testcon_north"].ConnectionString);
        con.Open();
        SqlCommand com = new SqlCommand("GetOrderCount", con);
        SqlDataReader dr = com.ExecuteReader();
        int count = 0;
        while (dr.Read())
        {
            if (dr[0] != null)
                int.TryParse(dr[0].ToString(), out count);           
        }
        return count;
    }
 
 
}

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