Skip contacts not in official folder

With Selenium, I upload the students' pictures in the folder, respectively, according to the student information in the datagridview. The program works smoothly, but it gives an error for students whose pictures are not in the folder. How can we skip students whose pictures are not in the folder?

    drv.SwitchTo().Window(drv.WindowHandles.ToList().Last());

    for (int i = 0; i < dataGridView1.Rows.Count; i++)
    {
        try
        {
            var val0 = dataGridView1.Rows[i].Cells[0].Value?.ToString();//students’numbers

            if (val0 != null && val0 != string.Empty)
            {


                    string filePath = System.IO.Path.Combine(System.Windows.Forms.Application.StartupPath, "resimler", jpgname + ".jpg");
                    Actions actions = new Actions(drv);
                    IWebElement uploadPhotoBtn = drv.FindElement(By.XPath("//*[@id='flResimSec']"));
                    Thread.Sleep(3000);


                    WebDriverWait wait = new WebDriverWait(drv, TimeSpan.FromSeconds(10));
                    IWebElement fileInput = wait.Until(drv =>
                    {
                        var element = drv.FindElement(By.XPath("//input[@type='file']"));
                        return element.Displayed ? element : throw new NoSuchElementException();
                    });

       


    if (filePath != null)
                {
                    
                    fileInput.SendKeys(filePath); // I am getting error here
                    SendKeys.SendWait("{Enter}");
                    SendKeys.SendWait("{ESC}");
                }                                              
                 else
                {
                    continue;

                }
            }
        }
        catch (NoSuchElementException)
        {
            continue;

        }

    }
}