using (SPSite site = new SPSite(“http://server“))

{

SPWeb web = site.OpenWeb();

SPList listCAMLQuery = web.Lists["listName"];

SPQuery query = new SPQuery(); // query for all the items

DataTable dt = listCAMLQuery.GetItems(query).GetDataTable(); // get datatable for all the list items

if (dt != null && dt.Rows.Count > )

{

//Group the data

var groupedList = from row in dt.AsEnumerable()

group row by row.Field<string>(“Company”) into groupedTable

// Company is the column name for groupby

// string is the type of column

orderby groupedTable.Key // key is the groupby column category value

select new

{

Key = groupedTable.Key, // key is the groupby column category value

companyCount = groupedTable.Count(), // count for columns in a groupby

groupedRows = groupedTable.CopyToDataTable() // grouped data

};

// print result

foreach (var items in groupedList)

{

int count = items.companyCount; // count for columns in a groupby category

DataTable dt1 = items.groupedRows;

gv.DataSource = dt1; //gridview

gv.DataBind();

}

}

}

}