TextFieldParser.ErrorLineNumber Property

 

Returns the number of the line that caused the most recent MalformedLineException exception.

Namespace:   Microsoft.VisualBasic.FileIO
Assembly:  Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

public long ErrorLineNumber { get; }

Property Value

Type: System.Int64

The number of the line that caused the most recent MalformedLineException exception.

If no MalformedLineException exceptions have been thrown, -1 is returned.

The ErrorLine property can be used to display the number of the line that caused the exception. Blank lines and comments are not ignored when determining the line number.

The following table lists examples of tasks involving the ErrorLineNumber property.

To

See

Read from a delimited file

How to: Read From Comma-Delimited Text Files in Visual Basic

Read from a fixed-width file

How to: Read From Fixed-width Text Files in Visual Basic

This example uses the ErrorLineNumber property to display the location of the line causing the current MalformedLineException exception.

Dim FileReader As Microsoft.VisualBasic.FileIO.TextFieldParser
FileReader = My.Computer.FileSystem.OpenTextFieldParser("C:\test.txt")
Dim currentRow As String()
While Not FileReader.EndOfData
    Try
        currentRow = FileReader.ReadFields
        For Each currentField As String In currentRow
            My.Computer.FileSystem.WriteAllText(
                "C://testfile.txt", currentField, True)
        Next
    Catch ex As Microsoft.VisualBasic.FileIO.MalformedLineException
        MsgBox("Line " & FileReader.ErrorLineNumber & " is not valid.")
    End Try
End While

.NET Framework
Available since 2.0
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