Check if DataRow exists by column name in c#? [duplicate]

Question

This question already has an answer here:

• ADO.NET DataRow - check for column existence 2 answers

I want to do something like this:

   private User PopulateUsersList(DataRow row)
        {
            Users user = new Users();
            user.Id = int.Parse(row["US_ID"].ToString());
            if (row["US_OTHERFRIEND"] != null)
            {
                user.OtherFriend = row["US_OTHERFRIEND"].ToString();
            }
            return user;
        }

However, I get an error saying US_OTHERFRIEND does not belong to the table. I want to simply check if it is not null, then set the value.

Isn't there a way to do this?

Answer 1

You should try

if (row.Table.Columns.Contains("US_OTHERFRIEND"))

I don't believe that row has a columns property itself.

Answer 2

if (drMyRow.Table.Columns["ColNameToCheck"] != null)
{
   doSomethingUseful;
{
else { return; }

Although the DataRow does not have a Columns property, it does have a Table that the column can be checked for.

Answer 3

You can use the DataColumnCollection of Your datatable to check if the column is in the collection.

Something like:

DataColumnCollection Columns = dtItems.Columns;

if (Columns.Contains(ColNameToCheck))
{
  row["ColNameToCheck"] = "Checked";
}

Answer 4

You can use

try {
   user.OtherFriend = row["US_OTHERFRIEND"].ToString();
}
catch (Exception ex)
{
   // do something if you want 
}

Answer 5

if (row.Columns.Contains("US_OTHERFRIEND"))