DataColumnMappingCollection.Add 方法

來源:

DataColumnMappingCollection.cs

來源:

DataColumnMappingCollection.cs

來源:

DataColumnMappingCollection.cs

public:
 virtual int Add(System::Object ^ value);

public int Add (object? value);

public int Add (object value);

abstract member Add : obj -> int
override this.Add : obj -> int

Public Function Add (value As Object) As Integer

參數

傳回

加入至集合的 DataColumnMapping 索引。

實作

例外狀況

範例

下列範例會搜尋 DataColumnMapping 集合內的物件。 如果對應存在於集合中，則會移除它。 如果集合中不存在對應，則會將它新增至集合，並顯示其索引。 此範例假設 DataColumnMappingCollection 已建立集合和 DataColumnMapping 物件。

public void ChangedMyMind()
{
    // ...
    // create mappings and mapping
    // ...
    if (mappings.Contains((Object) mapping))
    {
        mappings.Remove((Object) mapping);
    }
    else
    {
        mappings.Add((Object) mapping);
        Console.WriteLine("Index of new mapping: "
            + mappings.IndexOf((Object) mapping));
    }
}

Public Sub ChangedMyMind()
    ' ...
    ' create mappings and mapping
    ' ...
    If mappings.Contains(CType(mapping, Object)) Then
        mappings.Remove(CType(mapping, Object))
    Else
        mappings.Add(CType(mapping, Object))
        Console.WriteLine("Index of new mapping: " + _
           mappings.IndexOf(CType(mapping, Object)).ToString())
    End If
End Sub

另請參閱

• ADO.NET 概觀 \(部分機器翻譯\)

來源:

DataColumnMappingCollection.cs

來源:

DataColumnMappingCollection.cs

來源:

DataColumnMappingCollection.cs

public:
 System::Data::Common::DataColumnMapping ^ Add(System::String ^ sourceColumn, System::String ^ dataSetColumn);

public System.Data.Common.DataColumnMapping Add (string? sourceColumn, string? dataSetColumn);

public System.Data.Common.DataColumnMapping Add (string sourceColumn, string dataSetColumn);

member this.Add : string * string -> System.Data.Common.DataColumnMapping

Public Function Add (sourceColumn As String, dataSetColumn As String) As DataColumnMapping

參數

傳回

已經加入至集合中的 DataColumnMapping 物件。

範例

下列範例會 DataColumnMappingCollection 建立集合、將物件新增 DataColumnMapping 至集合，並顯示對應的源數據行清單。

public void CreateColumnMappings()
{
    DataColumnMappingCollection mappings =
        new DataColumnMappingCollection();
    mappings.Add("Category Name","DataCategory");
    mappings.Add("Description","DataDescription");
    mappings.Add("Picture","DataPicture");
    string myMessage = "ColumnMappings:\n";
    for(int i=0;i < mappings.Count;i++)
    {
        myMessage += i.ToString() + " "
            + mappings[i].ToString() + "\n";
    }
    Console.WriteLine(myMessage);
}

Public Sub CreateColumnMappings()
    Dim mappings As New DataColumnMappingCollection()
    mappings.Add("Category Name", "DataCategory")
    mappings.Add("Description", "DataDescription")
    mappings.Add("Picture", "DataPicture")
    Dim myMessage As String = "ColumnMappings:" + ControlChars.Cr
    Dim i As Integer
    For i = 0 To mappings.Count - 1
        myMessage += i.ToString() + " " + mappings(i).ToString() _
           + ControlChars.Cr
    Next i
    Console.WriteLine(myMessage)
End Sub

另請參閱

• ADO.NET 概觀 \(部分機器翻譯\)