datagridview populate, fill, data bindig

Question

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In my form i have a datagridview, I want to fill the datagridview from database and make some opereration befor filling the datagridview.

I use this code for selecting:

Program.Connection.CommandText = "select Contracts.ContractId, Contracts.StartDate, Contracts.EndDate, sum(ContractItems.Payment) AS Total_Platit from Contracts INNER JOIN ContractItems ON Contracts.ContractId = ContractItems.ContractId WHERE ClientID=@ClientID "
                + "GROUP BY Contracts.ContractId, Contracts.StartDate, Contracts.EndDate ORDER BY Contracts.StartDate";
            Program.Connection.AddParameter("@ClientID", cboNumeClient.SelectedValue.ToString());                    

            DataTable Table = new DataTable();
            Program.Connection.FillDataTable(Table, true);

dataContracteClienti.DataSource = Table;

MIDL

dataContracteClienti.Columns[0].HeaderText = "Nr. contract";
            dataContracteClienti.Columns[1].HeaderText = "Încheiat la";
            dataContracteClienti.Columns[2].HeaderText = "Expira la";
            dataContracteClienti.Columns[3].HeaderText = "Total plătit";

everything is ok.

Show me everything I selected, but also have other selected fields that do not want to appear as they are in the database, I want to do some mathematical calculations and then be displayed.

I tried

C#

public class ContracteClienti
        {
            public ContracteClienti(string NrContract, string sex, string dob, string data)
            {
                _nrContract = NrContract;
                _sex = sex;
                _dateOfBirth = dob;
                _date = Date;
            }
            public string NrContract
            {
                get { return _nrContract; }
                set { _nrContract = value; }
            }
            public string Sex
            {
                get { return _sex; }
                set { _sex = value; }
            }
            public string DateOfBirth
            {
                get { return _dateOfBirth; }
                set { _dateOfBirth = value; }
            }
            public string Date
            {
                get { return _date; }
                set { _date = value; }
            }
            private string _nrContract;
            private string _sex;
            private string _dateOfBirth;
            private string _date;
        }

        class PersonList : List<ContracteClienti>
        {
        }

PersonList people = new PersonList();

            for (int i = 0; i < Table.Rows.Count; i++)
            {

                people.Add(new ContracteClienti(Table.Rows[i]["ContractId"].ToString(), Table.Rows[i]["StartDate"].ToString(), Table.Rows[i]["EndDate"].ToString(), Table.Rows[i]["Total_Platit"].ToString()));

            }

            dataContracteClienti.DataSource = people;

But, for exemple the

Total_Platit

, created in the selection does not appear in the datagridview.

Suggestions?
any other method to display data in list?

Posted 25-Mar-11 7:23am

aciobanita

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Albin Abel · Answer 1 · 2011-03-25T21:28:00

Solution 1

How about using a DataAdapter to fill a <dataset>. Then the dataset's datatable you may perform your calculations like expression columns, applying new selection queries etc. Then bind to the data grid.

The Datatable can be Queryable as a linQ object. Also you can create Custom DataViews from datatable which can be bind to the data grid. Try in those ways and google may help you.

Posted 25-Mar-11 21:28pm

Albin Abel

Comments

aciobanita 27-Mar-11 10:00am

I use:

dataContracteClienti.Rows.Clear();
Program.Connection.CommandText = "select Contracts.ContractId, Contracts.StartDate, Contracts.EndDate, sum(ContractItems.Payment) AS Total_Platit from Contracts INNER JOIN ContractItems ON Contracts.ContractId = ContractItems.ContractId WHERE ClientID=@ClientID "
+ "GROUP BY Contracts.ContractId, Contracts.StartDate, Contracts.EndDate ORDER BY Contracts.StartDate";
Program.Connection.AddParameter("@ClientID", cboNumeClient.SelectedValue.ToString());
DataTable Table = new DataTable();
Program.Connection.FillDataTable(Table, true);

Table.Columns.Add(new DataColumn("ExtendedPrice", typeof(Decimal), "Total_Platit * 1.2"));

foreach (DataRow Row in Table.Rows)
{
dataContracteClienti.Rows.Add(Row["ContractId"].ToString(), Convert.ToDateTime(Row["StartDate"].ToString()), Convert.ToDateTime(Row["EndDate"].ToString()), Convert.ToInt32(Row["Total_Platit"].ToString()), Row["ExtendedPrice"].ToString());
}

look's ok

aciobanita 27-Mar-11 10:04am

As you see i use Convert.ToInt32(), because i set the column in the datagridview to a coustem format: 0,00 RON, is ok, or is another way to do?