Hi,

I have a problem with DataTable. I have one Repeater and one GridView Controls in my web page. User gets some information from Repeater with FindControl. I don't want to store this information in database because the user can change some informations. I send these informations to a datatable. The gridview shows these informations and uses datatable as datasource.

When I use gridview with auto generated columns there is no problem, but when I try to create my columns I receive an error.

 The error reads: "A field or property with the name 'urunid' was not found on the selected datasource".

the code is:

 protected void rep_ItemCommand(object source, RepeaterCommandEventArgs e)
    {
        if (e.CommandName == "ekle")
        {
             .
             .
             .
            {
                DataTable dt = new DataTable();
                dt = yenisepetyarat();
                DataRow drow = dt.NewRow();
                drow[0] = urunid;
                drow[1] = yemekadi;
                drow[2] = sayi;
                drow[3]=porsyon;
                drow[4] = ucret;
                dt.Rows.Add(drow);
                Session["sepet"] = dt;
                DataSet ds = new DataSet();
                ds.Tables.Add(dt);
                GridView1.DataSource = ds.Tables[0];
                GridView1.DataBind();
            }
         }       
    }


private DataTable yenisepetyarat()
    {
        DataTable dt = new DataTable();
        DataColumn urunid = new DataColumn();
        urunid.ColumnName = "urunid";
        urunid.Caption = "Ürün İd";
        urunid.DataType = typeof(int);
        dt.Columns.Add(urunid);

        DataColumn yemekadi = new DataColumn();
        urunid.ColumnName = "yemekadi";
        yemekadi.DataType = typeof(string);
        dt.Columns.Add(yemekadi);

        DataColumn adet = new DataColumn();
        urunid.ColumnName = "adet";
        adet.DataType = typeof(int);
        dt.Columns.Add(adet);

        DataColumn porsyon = new DataColumn();
        urunid.ColumnName ="porsyon";
        porsyon.DataType = typeof(string);
        dt.Columns.Add(porsyon);

        DataColumn fiyat = new DataColumn();
        urunid.ColumnName = "fiyat";
        fiyat.DataType = typeof(float);
        dt.Columns.Add(fiyat);
        return dt;
    }

 While creating datatable and adding columns to it, I check this process with "quickwatch". The problem is: I create the first column, then I create the second one. However, when the second column is created, it replaces the first column; and next to it, in the place where the second column should be I see a column created itself labelled "column1"  When I continue adding 3rd and the rest of the columns this process repeats itself. Each time I add a new column it replaces the former one, and a new column appears from nowhere next to it.

dt.Columns[0].ColumnName = second column.

dt.Columns[1].ColumnName=Column1

And I get an error while showing this data on gridview.

How can I solve this problem???

its a copy paste overlook. replace urunid.ColumnName for the second, third, fourth and fifth columns with corresponding datacolumn references.

Hope it helps