DataColumnCollection.IndexOf 方法

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

public:
 int IndexOf(System::Data::DataColumn ^ column);

public:
 virtual int IndexOf(System::Data::DataColumn ^ column);

public int IndexOf(System.Data.DataColumn? column);

public int IndexOf(System.Data.DataColumn column);

public virtual int IndexOf(System.Data.DataColumn column);

member this.IndexOf : System.Data.DataColumn -> int

abstract member IndexOf : System.Data.DataColumn -> int
override this.IndexOf : System.Data.DataColumn -> int

Public Function IndexOf (column As DataColumn) As Integer

Public Overridable Function IndexOf (column As DataColumn) As Integer

參數

傳回

欄位的索引 column 由指定：若找到;否則為 -1。

範例

以下範例使用該 Contains 方法判斷指定欄位是否存在於 DataColumnCollection。 如果是這樣，該 IndexOf 方法會回傳該欄位的索引。

private void GetIndex(DataTable table)
{
    DataColumnCollection columns = table.Columns;
    if(columns.Contains("City"))
    {
        Console.WriteLine(columns.IndexOf("City"));
    }
}

Private Sub GetIndex(ByVal table As DataTable)
    Dim iCol As Integer
    Dim columns As DataColumnCollection = table.Columns
    If columns.Contains("City") Then
       Console.WriteLine(columns.IndexOf("City"))
    End If
End Sub

備註

此 IndexOf 方法不區分大小寫。

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

來源:

DataColumnCollection.cs

public:
 int IndexOf(System::String ^ columnName);

public int IndexOf(string? columnName);

public int IndexOf(string columnName);

member this.IndexOf : string -> int

Public Function IndexOf (columnName As String) As Integer

參數

傳回

欄位名稱為零為基礎的索引，若欄位不存在於集合中則為 -1。