Best way to check if a Data Table has a null (SQL) value in it

Posted by: Vishal Kottarathil on 10:04 AM in .Net, ASP, C#, Datatable, DBNull, Null value, SQL 0

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 Check Whole table

If you want to check if a null value exists in the table you can use this method:

public static bool HasNull(this DataTable table)
{
    foreach (DataColumn column in table.Columns)
    {
        if (table.Rows.OfType<DataRow>().Any(r => r.IsNull(column)))
            return true;
    }

    return false;
}

and use 

table.HasNull(); 

 where ever you need

 Checking Specific column

Compare the value of the column to the DBNull.Value value to filter and manage null values in whatever way you see fit.

foreach(DataRow row in table.Rows)
{
    object value = row["ColumnName"];
    if (value == DBNull.Value)
        // do something
    else
        // do something else
}

Check More About DBNull Class