string to int problem

Question

Does not work else statement. Please help me. int countArmyNC = 0; foreach (DataGridViewRow row in dataGridView1APen.Rows) { if (row.Cells[4].Value.ToString() == ‡mbv evwnbx (bb KwgkÛ)) { countArmyNC++; } else { countArmyNC = ; } }

Tapan Patel · Answer

countArmyNC is int variable and when you do countArmyNC= you are trying to assign empty string to int. that is incorrect. please change your code to countArmyNC=0 (or anyother int value). Or if you are not intending to increment value of the variable then remove else loop completely.

Hamid Khan · Answer

Hi Shova In your problem As I thought you want to count increase when your critetria is match  else you want to assign null value but I think when your criteria is not match then you need to keep the same value as you have previously Solution A int countArmyNC = 0; foreach (DataGridViewRow row in dataGridView1APen.Rows) { if (row.Cells[4].Value.ToString() == ‡mbv evwnbx (bb KwgkÛ)) { countArmyNC++; } else { countArmyNC = countArmyNC } } Solution B you just need to remove else part Solution C (If you really want to null if critetia is not match then you need to make nullable type of your variable: int? countArmyNC = null; foreach (DataGridViewRow row in dataGridView1APen.Rows) { if (row.Cells[4].Value.ToString() == ‡mbv evwnbx (bb KwgkÛ)) { countArmyNC++; } else { countArmyNC = null; } } Hope this help you

Tapan Patel · Answer

Change your code to int countArmyNC = 0; foreach (DataGridViewRow row in dataGridView1APen.Rows) { if (row.Cells[4].Value.ToString() == ‡mbv evwnbx (bb KwgkÛ) ) { countArmyNC++; } else { countArmyNC =0 } }

Manikandan Murugesan · Answer

Try this: int x = Int32.Parse(TextBoxD1.Text); or better yet: int x = 0; Int32.TryParse(TextBoxD1.Text out x); Also since Int32.TryParse returns a bool you can use its return value to make decisions about the results of the parsing attempt: int x = 0; if (Int32.TryParse(TextBoxD1.Text out x)) { // you know that the parsing attempt // was successful } If you are curious the difference between Parse and TryParse is best summed up like this: The TryParse method is like the Parse method except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.

Puneet Kankar · Answer

int variable not blank so you given 0 or null . countArmyNC =0; countArmyNC =null; countArmyNC --;

Hassan Uddin Mughal · Answer

you can also assign null to int in else block

Ankit Sharma · Answer

Hi Shovan If assigning a null value for int variable is a must for you then i suggest you to use nullable types. use following code int ? countArmyNC = 0; foreach (DataGridViewRow row in dataGridView1APen.Rows) { if (row.Cells[4].Value.ToString() == ‡mbv evwnbx (bb KwgkÛ) ) { countArmyNC++; } else { countArmyNC = null ; } } To know more about nullable type please visit following links https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/nullable-types/using-nullable-types https://www.tutorialspoint.com/csharp/csharp_nullables.htm

Shovan Saha · Answer

Dear Tapan and Ankit Sir I am new in code. Please give me solution. I need null value.

Ankit Sharma · Answer

Hi Shovan The variable countArmyNC is declared as int so you cannot assigned string value to it. Hence countArmyNC = will give error. You can use countArmyNC =0 in else part of code.This will resolve your issue Hope this helps