Hot to bind result to gridview Using Linq and String Array in c# web application

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C#

application

web

string[] strarr;

DataTable dt1 = Commanclass.returnData("Select product+'==='+Packsize as Product from WholeSalerStock where wholesalerid=" + ddlWholeSaler.Text + " order by Product");
DataRow[] dr11 = dt1.Select();
strarr = Array.ConvertAll(dr11, new Converter<datarow,>(DataRowToString));

public static string DataRowToString(DataRow dr)
{
return dr["Product"].ToString();
}

gvProductPack.DataSource = from str in strarr where str.ToUpper().StartsWith(TextBox1.Text.ToUpper()) select str;
gvProductPack.DataBind()

This is my code But It works for single column i want to bind 2 more column as Whcode,Packsize to gridview. so what kind of changes r required here plz suggest me