bind gridview within while loop

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Hi,
how to bind gridview within while loop?before while datareader read Student Id then I want to disply data in gridview student Id wise.But it disply only last Id's details how I show whole data?

SqlCommand cmd = new SqlCommand("select distinct P.PartrowID from tbpanelparts P,tbParts PA where P.PartrowId=PA.ID and P.projid='"+Txt_prjid.Text+"' and P.partrowid not in (select ParentId from tbmakeup) and PA.supplierid="+Drp_supname.SelectedValue+"Union Select distinct(M.PartRowId) from tbMakeupproj MP,tbmakeup M,tbParts P where P.Id=M.PartRowId and MP.AssRowId=M.Rid and MP.ProjId='"+Txt_prjid.Text+"' and P.SupplierId="+Drp_supname.SelectedValue+"",connect.getConnection());
            cmd.Connection.Open();
            SqlDataReader dr = cmd.ExecuteReader();
            if (dr.HasRows)
            {
                while (dr.Read())
                {
                    //List p=new List();
                    //p.Add((int)dr[0]);
                    string a = dr[0].ToString();
                    SqlCommand cmd1 = new SqlCommand("Select C.CatName as ParentNm,P.CatName,P.PartNumber,n.TotQty,P.Price,P.SupplierId from tbParts P,tbCats C,(Select sum(CatQty) as TotQty from tbPanelParts PP,tbPanel PN  where PN.Id=PP.PanelId and PN.Status='Checked' and PN.Projid='" + Txt_prjid.Text + "' and PP.PartRowId=" + p + " and PP.partrowid not in (select ParentId from tbmakeup)) as n  where C.CatId=P.Parent and P.Id=" + p + "", connect.getConnection());
                    cmd1.Connection.Open();
                    SqlDataReader dr1=cmd1.ExecuteReader();
                    if (dr1.HasRows)
                    {
                        Grd_parts.DataSource = dr1;
                        Grd_parts.DataBind();
                    }
                   }
}

Posted 31-Oct-13 5:47am

Member 10315373

Updated 31-Oct-13 6:14am

Richard C Bishop

v2

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Richard C Bishop 31-Oct-13 11:52am

Show the code you are using.

Member 10315373 31-Oct-13 12:02pm

In second query Instead of parameter p I used a which is dr[0].tostring()

Member 10315373 31-Oct-13 12:00pm

SqlCommand cmd = new SqlCommand("select distinct P.PartrowID from tbpanelparts P,tbParts PA where P.PartrowId=PA.ID and P.projid='"+Txt_prjid.Text+"' and P.partrowid not in (select ParentId from tbmakeup) and PA.supplierid="+Drp_supname.SelectedValue+"Union Select distinct(M.PartRowId) from tbMakeupproj MP,tbmakeup M,tbParts P where P.Id=M.PartRowId and MP.AssRowId=M.Rid and MP.ProjId='"+Txt_prjid.Text+"' and P.SupplierId="+Drp_supname.SelectedValue+"",connect.getConnection());
cmd.Connection.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
//List<int> p=new List<int>();
//p.Add((int)dr[0]);
string a = dr[0].ToString();
SqlCommand cmd1 = new SqlCommand("Select C.CatName as ParentNm,P.CatName,P.PartNumber,n.TotQty,P.Price,P.SupplierId from tbParts P,tbCats C,(Select sum(CatQty) as TotQty from tbPanelParts PP,tbPanel PN where PN.Id=PP.PanelId and PN.Status='Checked' and PN.Projid='" + Txt_prjid.Text + "' and PP.PartRowId=" + p + " and PP.partrowid not in (select ParentId from tbmakeup)) as n where C.CatId=P.Parent and P.Id=" + p + "", connect.getConnection());
cmd1.Connection.Open();
SqlDataReader dr1=cmd1.ExecuteReader();
if (dr1.HasRows)
{
Grd_parts.DataSource = dr1;
Grd_parts.DataBind();
}
}
}

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2 solutions

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Ranjan.D · Answer 1 · 2013-10-31T06:18:00

Solution 1

Please have a look into the below article to understand more about GridView Binding. Note - You can't really set a DataReader as source for Gridview.

http://www.dotnetcurry.com/ShowArticle.aspx?ID=143[^]

Posted 31-Oct-13 6:18am

Ranjan.D

Comments

Member 10315373 1-Nov-13 2:44am

This article shows binding on gridview. But my question is though I use data table instead of data reader how I passed this datatable values to query which actually bind gridview.This will again comes into while loop.Is there any other way?

Ranjan.D 1-Nov-13 5:58am

You don't need a while loop at all. Did you see the below code in that article ?

conn.Open();
SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
DataTable dt = new DataTable();
dt.Load(dr);
GridView1.DataSource = dt;
GridView1.DataBind();

In first query instead of ExecuteReader you can use ExecuteScalar to return first row, first column value i.e to get P.PartrowID. Once you get this use the above code to fetch the records as you wish.

Vishnu Prajapati · Answer 2 · 2013-10-31T20:55:00

Solution 2

I Think This is Useful to you :
============================================

1> http://stackoverflow.com/questions/13971165/populate-gridview-at-runtime-using-textfile[^]

2> http://stackoverflow.com/questions/6083937/multiple-data-in-gridview[^]

Posted 31-Oct-13 20:55pm

Vishnu Prajapati