DataColumnMappingCollection.Item[] Özellik

Tanım

Belirtilen nesneyi alır veya ayarlar DataColumnMapping .Gets or sets the DataColumnMapping object specified.

Aşırı Yüklemeler

Item[Int32]

DataColumnMappingBelirtilen dizindeki nesneyi alır veya ayarlar.Gets or sets the DataColumnMapping object at the specified index.

Item[String]

DataColumnMappingBelirtilen kaynak sütun adına sahip nesneyi alır veya ayarlar.Gets or sets the DataColumnMapping object with the specified source column name.

Item[Int32]

DataColumnMappingBelirtilen dizindeki nesneyi alır veya ayarlar.Gets or sets the DataColumnMapping object at the specified index.

public:
 property System::Data::Common::DataColumnMapping ^ default[int] { System::Data::Common::DataColumnMapping ^ get(int index); void set(int index, System::Data::Common::DataColumnMapping ^ value); };
[System.ComponentModel.Browsable(false)]
public System.Data.Common.DataColumnMapping this[int index] { get; set; }
[System.ComponentModel.Browsable(false)]
[System.Data.DataSysDescription("DataColumnMappings_Item")]
public System.Data.Common.DataColumnMapping this[int index] { get; set; }
[<System.ComponentModel.Browsable(false)>]
member this.Item(int) : System.Data.Common.DataColumnMapping with get, set
[<System.ComponentModel.Browsable(false)>]
[<System.Data.DataSysDescription("DataColumnMappings_Item")>]
member this.Item(int) : System.Data.Common.DataColumnMapping with get, set
Default Public Property Item(index As Integer) As DataColumnMapping

Parametreler

index
Int32

Bulunacak nesnenin sıfır tabanlı dizini DataColumnMapping .The zero-based index of the DataColumnMapping object to find.

Özellik Değeri

DataColumnMapping

DataColumnMappingBelirtilen dizindeki nesne.The DataColumnMapping object at the specified index.

Öznitelikler

Örnekler

Aşağıdaki örnek bir koleksiyon oluşturur DataColumnMappingCollection , DataColumnMapping koleksiyona nesneler ekler ve eşlenmiş kaynak sütunlarının bir listesini görüntüler.The following example creates a DataColumnMappingCollection collection, adds DataColumnMapping objects to the collection, and displays a list of the mapped source columns.

public void CreateColumnMappings()
{
    DataColumnMappingCollection mappings =
        new DataColumnMappingCollection();
    mappings.Add("Category Name","DataCategory");
    mappings.Add("Description","DataDescription");
    mappings.Add("Picture","DataPicture");
    string message = "ColumnMappings:\n";
    for(int i=0;i < mappings.Count;i++)
    {
        message += i.ToString() + " "
            + mappings[i].ToString() + "\n";
    }
    Console.WriteLine(message);
}
Public Sub CreateColumnMappings()
    Dim mappings As New DataColumnMappingCollection()
    mappings.Add("Category Name", "DataCategory")
    mappings.Add("Description", "DataDescription")
    mappings.Add("Picture", "DataPicture")
    Dim message As String = "ColumnMappings:" + ControlChars.Cr
    Dim i As Integer
    For i = 0 To mappings.Count - 1
        message += i.ToString() + " " + mappings(i).ToString() _
           + ControlChars.Cr
    Next i
    Console.WriteLine(message)
End Sub

Ayrıca bkz.

Şunlara uygulanır

Item[String]

DataColumnMappingBelirtilen kaynak sütun adına sahip nesneyi alır veya ayarlar.Gets or sets the DataColumnMapping object with the specified source column name.

public:
 property System::Data::Common::DataColumnMapping ^ default[System::String ^] { System::Data::Common::DataColumnMapping ^ get(System::String ^ sourceColumn); void set(System::String ^ sourceColumn, System::Data::Common::DataColumnMapping ^ value); };
[System.ComponentModel.Browsable(false)]
public System.Data.Common.DataColumnMapping this[string sourceColumn] { get; set; }
[System.ComponentModel.Browsable(false)]
[System.Data.DataSysDescription("DataColumnMappings_Item")]
public System.Data.Common.DataColumnMapping this[string sourceColumn] { get; set; }
[<System.ComponentModel.Browsable(false)>]
member this.Item(string) : System.Data.Common.DataColumnMapping with get, set
[<System.ComponentModel.Browsable(false)>]
[<System.Data.DataSysDescription("DataColumnMappings_Item")>]
member this.Item(string) : System.Data.Common.DataColumnMapping with get, set
Default Public Property Item(sourceColumn As String) As DataColumnMapping

Parametreler

sourceColumn
String

Kaynak sütunun büyük/küçük harfe duyarlı adı.The case-sensitive name of the source column.

Özellik Değeri

DataColumnMapping

DataColumnMappingBelirtilen kaynak sütun adına sahip nesne.The DataColumnMapping object with the specified source column name.

Öznitelikler

Örnekler

Aşağıdaki örnek, DataColumnMapping bir koleksiyon içinde verilen kaynak sütun adına sahip bir nesne arar DataColumnMappingCollection .The following example searches for a DataColumnMapping object with the given source column name within a DataColumnMappingCollection collection. Varsa DataColumnMapping , örnek, eşlemenin adını ve dizinini görüntüler.If the DataColumnMapping exists, the example displays the name and the index of the mapping. Eşleme yoksa, örnek bir hata görüntüler.If the mapping does not exist, the example displays an error. Bu örnek DataColumnMappingCollection , bir koleksiyonun oluşturulduğunu varsayar.This example assumes that a DataColumnMappingCollection collection has been created.

public void FindDataColumnMapping()
{
    // ...
    // create columnMappings
    // ...
    if (!columnMappings.Contains("Description"))
    {
        Console.WriteLine("Error: no such table in collection.");
    }
    else
    {
        Console.WriteLine("Name {0}",
            columnMappings["Description"].ToString());
        Console.WriteLine("Index: {0}",
            columnMappings.IndexOf("Description").ToString());
    }
}
Public Sub FindDataColumnMapping()
    ' ...
    ' create columnMappings
    ' ...
    If Not columnMappings.Contains("Description") Then
        Console.WriteLine("Error: no such table in collection.")
    Else
       Console.WriteLine("Name: {0}", _
           columnMappings("Description").ToString())
       Console.WriteLine("Index: {0}", _
           columnMappings.IndexOf("Description").ToString())
    End If
End Sub

Ayrıca bkz.

Şunlara uygulanır