Question

How can I update cell value of data table

if ((sr_no == "") && (customer_name != ""))
{
  string contact_no = SheetData.Tables[0].Rows[row].ItemArray[3].ToString();
  Records.Rows[0].ItemArray[2]                                      
}
    

I want to update cell of datatable if contact_no fround in next row.

Answer 1

if Records is your DataTable do this:

Records.Rows[i][j] = value;

this does not answer the whole question but shows you how to set a value in a DataTable “cell”.

you are using the ItemArray which is not needed because once you have the right Row you can simply access its columns withh []

you can elaborate more and find out the final solution based on this hint.