I have 5 fields in a form which are pre populated. Using Selenium web driver how can I verify which one of the field is empty - selenium

Question

I have a test case to verify a form. There are 5 fields which will be prepopulated. If any one of the field is empty, after submitting error message will come. I am fetching the text from all the fields and asserting if they are not null, asserting is failing since one field is null in these. But how to find out dynamically which field is empty.
There might be a possibility to take each field and assert each field if empty or not. but I guess that will make the code clumsy.
Any other ways by which I can do this?
Following is my code :
String sender = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$textsendername1")).Text;
String country = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$ddlCountry")).Text;
String address1 = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtsenderaddress1")).Text;
String city = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtcity")).Text;
String state = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$ddlstate")).Text;
String zip = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtzip")).Text;
try
{
Assert.IsNotEmpty(sender, country, address1, city, state, zip);
}
catch (Exception e)
{
String excep = e.ToString();
Console.WriteLine(excep);
}

Answer 1

I would create a function that determines if any of the fields are empty since you will likely be using this repeatedly.
public bool HasEmptyField()
{
string sender = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$textsendername1")).GetAttribute("value");
string country = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$ddlCountry")).GetAttribute("value");
string address1 = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtsenderaddress1")).GetAttribute("value");
string city = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtcity")).GetAttribute("value");
string state = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$ddlstate")).GetAttribute("value");
string zip = driver.FindElement(By.Name("ctl00$ContentPlaceHolder$txtzip")).GetAttribute("value");
return string.IsNullOrEmpty(sender) ||
string.IsNullOrEmpty(country) ||
string.IsNullOrEmpty(address1) ||
string.IsNullOrEmpty(city) ||
string.IsNullOrEmpty(state) ||
string.IsNullOrEmpty(zip);
}
Your script would then look something like
bool expectError = HasEmptyField();
driver.FindElement(submitButtonLocator).Click(); // click submit button
if (expectError)
{
Assert.True(driver.FindElements(errorMessageLocator).Any(), "Verify error message exists");
// do something to address the error message
}
// continue the script