Hi Divan,
you can create Identity column in Existing Datatable in following Steps :
Step 1) Create an Identity Column
DataColumn IdentityCol = new DataColumn("ID");
IdentityCol.AutoIncrement = true;
IdentityCol.AutoIncrementSeed = 1;
IdentityCol.AutoIncrementStep = 1;
Step 2) Add Identity Column to Exisiting Datatable
dt.Columns.Add(IdentityCol);
Step 3) Update Exisitng DataColumn Value
for(i=1; i<=dt.Rows.Count; i++)
{
dt.Rows[i-1]["ID"] = i;
}
<pre>
Now Identity Column will automatically Incremented, whenever new row gets added.
Thanks!
Yogendra Dubey