Fill a GridView column data based on the API response - asp.net

Question

I am new to ASP.NET. I want to add a column to GridView dynamically based on the response of an API
id User secretcode
1 u1 {response from the API based on the Id value}
2 u1 {response from the API based on the Id value}
3 u1 {response from the API based on the Id value}
4 u1 {response from the API based on the Id value}
5 u1 {response from the API based on the Id value}
id and User are already in my database table (users), so for each returned row, I want to call API to fill my 3rd column i.e. secretcode. Basically, I am confused with where to use ForEach loop.
This is rough code on which I am working on:
DataTable table = new DataTable();
DataColumn col3 = new DataColumn("Secretcode");
col3.DataType = System.Type.GetType("System.Int");
table.Columns.Add(col3);
row[col3] = {response data from API}
gvTest.DataSource = table;
gvTest.DataBind();

Answer 1

Perhaps something like this
DataTable table = new DataTable();
DataColumn col = new DataColumn("Secretcode");
table.Columns.Add(col);
for(int i = 0; i < table.Rows.Count; i++)
{
// Where 'SomeAPICall()' is calling the API and returning the
// correct data type. If it is returning an object you may want
// to convert it before you attach it to the table
table.Rows[i]["Secretcode"] = SomeAPICall(table.Rows[i]["id"]);
}
gvTest.DataSource = table;
gvTest.DataBind();
Or if you're sold on the idea of the foreach loop:
DataTable table = new DataTable();
DataColumn col = new DataColumn("Secretcode");
table.Columns.Add(col);
foreach(DataRow row in table.Rows)
{
// Where 'SomeAPICall()' is calling the API and returning the
// correct data type. If it is returning an object you may want
// to convert it before you attach it to the table
row["Secretcode"] = SomeAPICall(row["id"]);
}
gvTest.DataSource = table;
gvTest.DataBind();
I prefer using for loops generally because often you want to use the same index number on 2 different collections which you can't really do with a foreach loop. In this case though it won't matter.