Check if the csv file has integer or string values.

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Hello,

I have a csv file that I'm reading in my azure function:

CSV FILE:

A B C
test test11 22
11 33 test

C# code:

C#

public static class Function1
    {
        [FunctionName("Function1")]
        public static void Run([TimerTrigger("0 */5 * * * *")] TimerInfo myTimer, ILogger log)
        {
            log.LogInformation($"C# Timer trigger function started at: {DateTime.Now}");
            Thread.Sleep(2000);
            log.LogInformation($"C# Timer trigger function completed at: {DateTime.Now}");
            var path = @"C:\Users\sandurpr\Desktop\C# ....COA-Blanket-TB.csv";
            string csvData = File.ReadAllText(path);
            Console.WriteLine(csvData);

Requirement:

I want the user to check if the values in any row of any column is an integer or string.
if it is string then print string else print integer.
e.g when user inputs the row and column:
column: 2
row :1
string (test11)

Thank you.

What I have tried:

I tried declaring the columns first and assigning it to int or string and then calling each column to check if there is integer or string. But this didnt work out.

Posted 19-Sep-20 6:24am

cdax

Updated 19-Sep-20 13:57pm

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Richard MacCutchan · Answer 1 · 2020-09-19T06:56:00

Solution 1

Use Int32.TryParse Method (System) | Microsoft Docs[^].

Posted 19-Sep-20 6:56am

Richard MacCutchan

BillWoodruff · Answer 2 · 2020-09-19T13:57:00

1 Key question: does your CSV data have an initial row that names colums in a way you can easily infer the column data type ?

2 If you are using zero based indexing: column: 2 row :1 ... is 22.

3 Are there any other numeric types you need to handle other than Int32 ?

There are many CP articles with code for CSV processing that might save you a lot of time; here's a recent one:[^], For more: [^].

This discussion on SO describes several approaches to CSV validation; most of them involve conversion to a DataSet, or Class structureL [^].

If you need to test a string for numeric conversion: Double.TryParse will return 'true for all types of numbers: decimal, float, etc.