How to add new column to Data table?

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I have a GridView which is used to display report of Profit Amount. Here i'm binding GridView from backent using DataTable my code is like this

C#

SqlCommand cmd = new SqlCommand();
cmd.CommandText = "GetProfitAmount";
cmd.Connection = _sConn;
cmd.CommandType = CommandType.StoredProcedure;
if (shareHolderId != 0)
{
    cmd.Parameters.Add("@ShareHolderId", SqlDbType.Int).Value = shareHolderId;
}
else
{
    cmd.Parameters.Add("@ShareHolderId", SqlDbType.Int).Value = DBNull.Value;
}
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
adp.Fill(dt);

here i'm binding directly from code behind. There I've two columns, which are "ActualPaid and PaidAmount" Now I want to add one more column to existing DataTable with the column name TotalProfit and value will be like "ActualPaid - PaidAmount".

So can anyone help me please

Thanks in @dv@nce

Posted 19-Aug-13 21:39pm

Aboobakkar Siddeq D U

Updated 19-Aug-13 21:40pm

Karthik Harve

v2

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*Karthik Harve* · Accepted Answer · 2013-08-19T21:47:00

Solution 1

Hi,

try like below:

C#

dt.Columns.Add("TotalProfit", type(System.Double));
dt.AcceptChanges();

foreach(DataRow row in dt.Rows)
{
    row["TotalProfit"] = Convert.ToDouble(row["ActualPaid"].ToString()) - Convert.ToDouble(row["PaidAmount"].ToString());
}
dt.AcceptChanges();

you must take care of casting and default values.

hope it helps.

Posted 19-Aug-13 21:47pm

Karthik Harve

Comments

Aboobakkar Siddeq D U 20-Aug-13 4:43am

Thanks,,,but it showing error like this "the name commandtype does not exist in the current context"

Aboobakkar Siddeq D U 20-Aug-13 4:49am

Thanks a lot, it works fine now

I used this code

<pre lang="cs">
dt.Columns.Add("TotalProfit");
dt.AcceptChanges();
foreach (DataRow row in dt.Rows)
{
row["TotalProfit"] = Convert.ToDouble(row["PaidAmount"].ToString()) - Convert.ToDouble(row["ActualPaid"].ToString());
}
dt.AcceptChanges();</pre>

Karthik Harve 20-Aug-13 5:54am

you welcome !!!