Specified cast is not valid

Question

Hi I am getting above error on below line Session["dupRecords"] = ""; Session["totRecords"] = ""; Session["dupRecords"] = ((int?)Session["dupRecords"] ?? 0) + 1; Thanks

Mohamed Azarudeen Z · Answer

To resol ve thiserror find below the updates code // Retrieve the value from session and cast it to int int dupRecords = (int)(Session["dupRecords"] ?? 0); int totRecords = (int)(Session["totRecords"] ?? 0); // Increment the values dupRecords++; totRecords++; // Store the updated values back in session Session["dupRecords"] = dupRecords; Session["totRecords"] = totRecords; In the updated code, i cast the retrieved values from Session["dupRecords"] and Session["totRecords"] to int using (int)(Session["..."] ?? 0) . The (int?) part is not required since we are explicitly assigning a default value of 0 using the null coalescing operator ( ?? ) if the session variable is null or does not exist. After incrementing the values, we assign the updated values back to the session variables Session["dupRecords"] and Session["totRecords"] . By explicitly casting the values to int , you can perform arithmetic operations on them without encountering any errors.