DataTableCollection.Item[] 属性

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

public:
 property System::Data::DataTable ^ default[int] { System::Data::DataTable ^ get(int index); };

public System.Data.DataTable this[int index] { get; }

member this.Item(int) : System.Data.DataTable

Default Public ReadOnly Property Item(index As Integer) As DataTable

参数

属性值

具有DataTable指定索引的 ;如果 不存在，DataTable则null为 。

例外

示例

以下示例按索引检索 DataTable 。

private void GetDataTableByIndex()
{
   // presuming a DataGrid is displaying more than one table, get its DataSet.
   DataSet thisDataSet = (DataSet)DataGrid1.DataSource;
   // Get the DataTableCollection.
   DataTableCollection tablesCollection = thisDataSet.Tables;
   // Iterate through the collection to get each table name.
   for (int i = 0; i < tablesCollection.Count; i++)
      Console.WriteLine(tablesCollection[i].TableName);
}

Private Sub GetDataTableByIndex()
    ' Presuming a DataGrid is displaying more than one table, get its DataSet.
    Dim thisDataSet As DataSet = CType(DataGrid1.DataSource, DataSet)

    ' Get the DataTableCollection.
    Dim tablesCollection As DataTableCollection = thisDataSet.Tables

    ' Iterate through the collection to get each table name.
    Dim i As Integer
    For i = 0 To tablesCollection.Count - 1
       Console.WriteLine(tablesCollection(i).TableName)
    Next
End Sub

注解

Contains使用 方法确定是否存在具有特定索引的表。

如果具有表的名称，但没有表的索引，请使用 IndexOf 方法返回索引。

另请参阅

• Contains(String)
• IndexOf(DataTable)
• DataTable

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

public:
 property System::Data::DataTable ^ default[System::String ^] { System::Data::DataTable ^ get(System::String ^ name); };

public System.Data.DataTable? this[string? name] { get; }

public System.Data.DataTable this[string name] { get; }

member this.Item(string) : System.Data.DataTable

Default Public ReadOnly Property Item(name As String) As DataTable

参数

属性值

具有指定名称的 DataTable；否则，如果 DataTable 不存在，则为 null。

示例

以下示例从 DataTableCollection中按名称检索单个表。

private void GetTableByName()
{
    // Presuming a DataGrid is displaying more than one table, get its DataSet.
    DataSet thisDataSet = (DataSet)DataGrid1.DataSource;

    // Get the DataTableCollection.
    DataTableCollection tablesCollection = thisDataSet.Tables;

    // Get a specific table by name.
    DataTable table = tablesCollection["Suppliers"];
    Console.WriteLine(table.TableName);
}

Private Sub GetTableByName()
    ' Presuming a DataGrid is displaying more than one table, 
    ' get its DataSet.
    Dim thisDataSet As DataSet = CType(DataGrid1.DataSource, DataSet)

    ' Get the DataTableCollection.
    Dim tablesCollection As DataTableCollection = thisDataSet.Tables

    ' Get a specific table by name.
    Dim table As DataTable = tablesCollection("Suppliers")
    Console.WriteLine(table.TableName)
End Sub

注解

DataTable如果存在与搜索字符串大小写匹配的名称，则返回该名称。 否则将执行不区分大小写的搜索，如果 DataTable 找到与此搜索匹配的名称，则返回该搜索。

Contains使用 方法确定是否存在具有特定名称或索引的表。

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

public:
 property System::Data::DataTable ^ default[System::String ^, System::String ^] { System::Data::DataTable ^ get(System::String ^ name, System::String ^ tableNamespace); };

public System.Data.DataTable? this[string? name, string tableNamespace] { get; }

public System.Data.DataTable this[string name, string tableNamespace] { get; }

member this.Item(string * string) : System.Data.DataTable

Default Public ReadOnly Property Item(name As String, tableNamespace As String) As DataTable

参数

属性值

具有指定名称的 DataTable；否则，如果 DataTable 不存在，则为 null。