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Compare rows from gridview1 to gridview2

Posted on 2009-07-04
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Last Modified: 2013-11-25
I have two gridview in a webpage, each get data from different source but they have two rows are are the same
Gridview1
Code    Boxes      
x1           100

GridView2
Code     Boxes
x1          120

Gridview updates Boxes automatically
so I want to compare this two numbers an get the results into another column on GridView2 called Difference  based on the  Code  listed on both grids. Any ideas
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Question by:teogos
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8 Comments
 
LVL 53

Expert Comment

by:Dhaest
ID: 24813698
How do you retrieve the data ? Is it in a dataset, ... ?
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Author Comment

by:teogos
ID: 24813771
using the wizard to a SLQ connection   sqldatasource
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LVL 53

Expert Comment

by:Dhaest
ID: 24813831
Compare 2 Gridview row values and write those who doesn't match
http://forums.asp.net/p/1236832/2247869.aspx
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Author Comment

by:teogos
ID: 24814003
Looks a good sample but I can see to get where is writing the difference
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Author Comment

by:teogos
ID: 24815322
Perhaps the question was not understood,  
Grid1
code     boxes
x1          200
x2          100

Grid2
code      boxes
x1         300
x2          150

compare grid1  on code  to grid2 and   add a column on grid2
where it will show the difference on BOXES  from grid1  to grid2  base on CODE
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LVL 53

Expert Comment

by:Dhaest
ID: 24820721
Can you show how you bind the data, because I think you'll need some comparision on level of your datainput (sqldatasource, objectdatasource, ...)
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LVL 53

Accepted Solution

by:
Dhaest earned 500 total points
ID: 24820803
I've tested it with code below
        protected void Page_Load(object sender, EventArgs e)

        {

            DataTable dtGrid1 = new DataTable();

            dtGrid1.Columns.Add("Code", typeof(string));

            dtGrid1.Columns.Add("Boxes", typeof(int));

            DataTable dtGrid2 = new DataTable();

            dtGrid2.Columns.Add("Code", typeof(string));

            dtGrid2.Columns.Add("Boxes", typeof(int));
 

            // fill first datatable

            DataRow dr = dtGrid1.NewRow();

            dr["Code"] = "x1";

            dr["Boxes"] = 100;

            dtGrid1.Rows.Add(dr);

            dr = dtGrid1.NewRow();

            dr["Code"] = "x2";

            dr["Boxes"] = 200;

            dtGrid1.Rows.Add(dr);
 

            // fill second datatable

            dr = dtGrid2.NewRow();

            dr["Code"] = "x1";

            dr["Boxes"] = 100;

            dtGrid2.Rows.Add(dr);

            dr = dtGrid2.NewRow();

            dr["Code"] = "x2";

            dr["Boxes"] = 220;

            dtGrid2.Rows.Add(dr);
 

            GridView1.DataSource = dtGrid1;

            GridView1.DataBind();
 

            GridView2.DataSource = dtGrid2;

            GridView2.DataBind();
 

        }
 

        protected void Button1_Click(object sender, EventArgs e)

        {

            DataTable alfa = (DataTable)GridView1.DataSource;

            alfa.Columns.Add("Equal", typeof(bool));

            DataTable beta = (DataTable)GridView2.DataSource;

            foreach (DataRow x in alfa.Rows)

            {

                bool bEqual = false;

                string strFilter = "Code = '" + x["code"].ToString() + "'";

                DataRow[] filtered = beta.Select(strFilter);

                if (filtered.GetUpperBound(0) >= 0)

                {

                    DataRow dr = filtered[0];

                    if (dr["Boxes"].ToString().Trim() == x["Boxes"].ToString().Trim())

                        bEqual = true;

                }

                x["Equal"] = bEqual;

            }

            GridView1.DataSource = alfa;

            GridView1.DataBind();

        }

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Author Closing Comment

by:teogos
ID: 31599783
Sorry, took so long to get back into, but this works I just have to rearrenge the data. Thanks
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