DataTableCollection.IndexOf 方法

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

public:
 int IndexOf(System::String ^ tableName, System::String ^ tableNamespace);

public int IndexOf (string tableName, string tableNamespace);

member this.IndexOf : string * string -> int

Public Function IndexOf (tableName As String, tableNamespace As String) As Integer

参数

返回

具有指定名称的 DataTable 的从零开始的索引；或者如果集合中不存在该表，则为 –1。

示例

以下示例返回 中命名表的 DataTableCollection索引。

private void GetIndexes()
{
    // Get the DataSet of a DataGrid.
    DataSet thisDataSet = (DataSet)DataGrid1.DataSource;

    // Get the DataTableCollection through the Tables property.
    DataTableCollection tables = thisDataSet.Tables;

    // Get the index of the table named "Authors", if it exists.
    if (tables.Contains("Authors"))
        System.Diagnostics.Debug.WriteLine(tables.IndexOf("Authors"));
}

Private Sub GetIndexes()
   ' Get the DataSet of a DataGrid.
   Dim thisDataSet As DataSet = CType(DataGrid1.DataSource, DataSet)

   ' Get the DataTableCollection through the Tables property.
   Dim tables As DataTableCollection = thisDataSet.Tables

   ' Get the index of the table named "Authors", if it exists.
   If tables.Contains("Authors") Then
      System.Diagnostics.Debug.WriteLine(tables.IndexOf("Authors"))
   End If
End Sub

注解

使用 TableName 属性指定对象的名称DataTable。

另请参阅

• IndexOf(DataTable)
• TableName
• Remove(DataTable)

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

public:
 int IndexOf(System::Data::DataTable ^ table);

public:
 virtual int IndexOf(System::Data::DataTable ^ table);

public int IndexOf (System.Data.DataTable? table);

public int IndexOf (System.Data.DataTable table);

public virtual int IndexOf (System.Data.DataTable table);

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

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

Public Function IndexOf (table As DataTable) As Integer

Public Overridable Function IndexOf (table As DataTable) As Integer

参数

返回

表从零开始的索引，如果在集合中未找到该表，则为 -1。

示例

以下示例返回 中每个表的 DataTableCollection索引。

private void GetIndexes()
{
    // Get the DataSet of a DataGrid.
    DataSet thisDataSet = (DataSet)DataGrid1.DataSource;

    // Get the DataTableCollection through the Tables property.
    DataTableCollection tables = thisDataSet.Tables;

    // Get the index of each table in the collection.
    foreach (DataTable table in tables)
        System.Diagnostics.Debug.WriteLine(tables.IndexOf(table));
}

Private Sub GetIndexes()
    ' Get the DataSet of a DataGrid.
    Dim thisDataSet As DataSet = CType(DataGrid1.DataSource, DataSet)

    ' Get the DataTableCollection through the Tables property.
    Dim tables As DataTableCollection = thisDataSet.Tables
    Dim table As DataTable

    ' Get the index of each table in the collection.
    For Each table In tables
       System.Diagnostics.Debug.WriteLine(tables.IndexOf(table))
    Next
End Sub

注解

IndexOf使用 方法确定给定表的确切索引。

在调用 IndexOf之前，可以使用 方法测试是否存在由 index 或 name) 指定的表 (Contains 。

另请参阅

• IndexOf(DataTable)
• TableName
• Remove(DataTable)

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

Source:

DataTableCollection.cs

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

public:
 virtual int IndexOf(System::String ^ tableName);

public int IndexOf (string? tableName);

public int IndexOf (string tableName);

public virtual int IndexOf (string tableName);

member this.IndexOf : string -> int

abstract member IndexOf : string -> int
override this.IndexOf : string -> int

Public Function IndexOf (tableName As String) As Integer

Public Overridable Function IndexOf (tableName As String) As Integer

参数

返回

具有指定名称的 DataTable 的从零开始的索引；或者如果集合中不存在该表，则为 –1。

示例

以下示例返回 中命名表的 DataTableCollection索引。

private void GetIndexes()
{
    // Get the DataSet of a DataGrid.
    DataSet thisDataSet = (DataSet)DataGrid1.DataSource;

    // Get the DataTableCollection through the Tables property.
    DataTableCollection tables = thisDataSet.Tables;

    // Get the index of the table named "Authors", if it exists.
    if (tables.Contains("Authors"))
        System.Diagnostics.Debug.WriteLine(tables.IndexOf("Authors"));
}

Private Sub GetIndexes()
   ' Get the DataSet of a DataGrid.
   Dim thisDataSet As DataSet = CType(DataGrid1.DataSource, DataSet)

   ' Get the DataTableCollection through the Tables property.
   Dim tables As DataTableCollection = thisDataSet.Tables

   ' Get the index of the table named "Authors", if it exists.
   If tables.Contains("Authors") Then
      System.Diagnostics.Debug.WriteLine(tables.IndexOf("Authors"))
   End If
End Sub

注解

使用 TableName 属性指定对象的名称DataTable。

当两个或多个表具有相同名称但命名空间不同时，此方法将返回 -1。 如果在将表名只匹配到一个表时存在任何二义性，则该调用不会成功。

另请参阅

• IndexOf(DataTable)
• TableName
• Remove(DataTable)