VersionNotFoundException Klass

Definition

public ref class VersionNotFoundException : System::Data::DataException

[System.Serializable]
public class VersionNotFoundException : System.Data.DataException

public class VersionNotFoundException : System.Data.DataException

[<System.Serializable>]
type VersionNotFoundException = class
    inherit DataException

type VersionNotFoundException = class
    inherit DataException

Public Class VersionNotFoundException
Inherits DataException

Arv

Object

Exception

SystemException

DataException

VersionNotFoundException

Attribut

SerializableAttribute

Exempel

I följande exempel skapas ett DataTable med ett DataColumn och tio DataRow objekt. När du har tagit bort en DataRowgenereras ett VersionNotFoundException undantag när du försöker returnera den borttagna radens aktuella version.

private void DemonstrateVersionNotFoundException()
{
    // Create a DataTable with one column.
    DataTable table = new DataTable("NewTable");
    DataColumn column = new DataColumn("NewColumn");
    table.Columns.Add(column);
    DataRow newRow;

    for(int i = 0;i <10;i++)
    {
        newRow = table.NewRow();
        newRow["NewColumn"] = i;
        table.Rows.Add(newRow);
    }
    table.AcceptChanges();

    try
    {
        Console.WriteLine("Trying...");
        DataRow removedRow = table.Rows[9];
        removedRow.Delete();
        removedRow.AcceptChanges();
        // Try to get the Current row version.
        Console.WriteLine(removedRow[0,DataRowVersion.Current]);
    }
    catch(System.Data.VersionNotFoundException)
    {
        Console.WriteLine("Current version of row not found.");
    }
}

Private Sub DemonstrateVersionNotFoundException()
    ' Create a DataTable with one column.
    Dim table As New DataTable("NewTable")
    Dim column As New DataColumn("NewColumn")
    table.Columns.Add(column)
    Dim newRow As DataRow
    
    Dim i As Integer
    For i = 0 To 9
        newRow = table.NewRow()
        newRow("NewColumn") = i
        table.Rows.Add(newRow)
    Next i
    table.AcceptChanges()

    Try
        Console.WriteLine("Trying...")
        Dim removedRow As DataRow = table.Rows(9)
        removedRow.Delete()
        removedRow.AcceptChanges()

        ' Try to get the Current row version.
        Console.WriteLine(removedRow(0, DataRowVersion.Current))
    
    Catch e As System.Data.VersionNotFoundException
        Console.WriteLine("Current version of row not found.")
    End Try
End Sub