DataRow.GetChildRows 方法

public:
 cli::array <System::Data::DataRow ^> ^ GetChildRows(System::Data::DataRelation ^ relation);

public System.Data.DataRow[] GetChildRows (System.Data.DataRelation? relation);

public System.Data.DataRow[] GetChildRows (System.Data.DataRelation relation);

member this.GetChildRows : System.Data.DataRelation -> System.Data.DataRow[]

Public Function GetChildRows (relation As DataRelation) As DataRow()

参数

返回

DataRow[]

一个 DataRow 对象数组，或长度为零的数组。An array of DataRow objects or an array of length zero.

例外

示例

下面的示例使用 GetChildRows 返回 DataRow 中每个子对象的子对象 DataRelation DataTable 。The following example uses the GetChildRows to return the child DataRow objects for every child DataRelation in a DataTable. 然后打印该行中每列的值。The value of each column in the row is then printed.

private void GetChildRowsFromDataRelation(DataTable table)
{
    DataRow[] arrRows;
    foreach(DataRelation relation in table.ChildRelations)
    {
        foreach(DataRow row in table.Rows)
        {
            arrRows = row.GetChildRows(relation);
            // Print values of rows.
            for(int i = 0; i < arrRows.Length; i++)
            {
                foreach(DataColumn column in table.Columns)
                {
                    Console.WriteLine(arrRows[i][column]);
                }
            }
        }
    }
}

Private Sub GetChildRowsFromDataRelation(table As DataTable)
    Dim relation As DataRelation
    Dim arrRows() As DataRow
    Dim row As DataRow
    Dim i As Integer
    Dim column As DataColumn 
 
    For Each relation In table.ChildRelations
      For Each row In table.Rows
          arrRows = row.GetChildRows(relation)
          ' Print values of rows.
          For i = 0 To arrRows.GetUpperBound(0)
             For Each column in table.Columns
                Console.WriteLine(arrRows(i)(column))
             Next column
          Next i
       Next row
    Next relation
 End Sub

注解

DataTable还包含 DataRelation 由属性返回的对象的集合 ChildRelations 。The DataTable also contains a collection of DataRelation objects that is returned by the ChildRelations property.

另请参阅

• ChildRelations
• DataRelation
• GetParentRows(String)
• Relations
• 在 ADO.NET 中使用数据集Using DataSets in ADO.NET

public:
 cli::array <System::Data::DataRow ^> ^ GetChildRows(System::String ^ relationName);

public System.Data.DataRow[] GetChildRows (string? relationName);

public System.Data.DataRow[] GetChildRows (string relationName);

member this.GetChildRows : string -> System.Data.DataRow[]

Public Function GetChildRows (relationName As String) As DataRow()

参数

返回

DataRow[]

一个 DataRow 对象数组，或长度为零的数组。An array of DataRow objects or an array of length zero.

例外

注解

DataTable还包含 DataRelation 由属性返回的对象的集合 ChildRelations 。The DataTable also contains a collection of DataRelation objects that is returned by the ChildRelations property.

public:
 cli::array <System::Data::DataRow ^> ^ GetChildRows(System::Data::DataRelation ^ relation, System::Data::DataRowVersion version);

public System.Data.DataRow[] GetChildRows (System.Data.DataRelation? relation, System.Data.DataRowVersion version);

public System.Data.DataRow[] GetChildRows (System.Data.DataRelation relation, System.Data.DataRowVersion version);

member this.GetChildRows : System.Data.DataRelation * System.Data.DataRowVersion -> System.Data.DataRow[]

Public Function GetChildRows (relation As DataRelation, version As DataRowVersion) As DataRow()

参数

返回

DataRow[]

一个 DataRow 对象数组。An array of DataRow objects.

例外

示例

下面的示例使用 GetChildRows 返回 DataRow 中每个子对象的子对象 DataRelation DataTable 。The following example uses the GetChildRows to return the child DataRow objects for every child DataRelation in a DataTable. 然后打印行中具有指定版本的每一列的值。The value of each column with the specified version in the row is then printed.

private void GetChildRowsFromDataRelation(DataTable table )
{
    DataRow[] arrRows;
    foreach(DataRelation relation in table.ChildRelations)
    {
        foreach(DataRow row in table.Rows)
        {
            arrRows = row.GetChildRows(relation,
                DataRowVersion.Proposed);
            // Print values of rows.
            for(int i = 0; i < arrRows.Length; i++)
            {
                foreach(DataColumn column in table.Columns)
                {
                    Console.WriteLine(arrRows[i][column]);
                }
            }
        }
    }
}

Private Sub GetChildRowsFromDataRelation(table As DataTable)
    Dim relation As DataRelation
    Dim arrRows() As DataRow
    Dim row As DataRow
    Dim i As Integer
    Dim column As DataColumn 
 
    For Each relation In table.ChildRelations
      For Each row In table.Rows
          arrRows = row.GetChildRows(relation, _
                DataRowVersion.Proposed)
          ' Print values of rows.
          For i = 0 To arrRows.GetUpperBound(0)
             For Each column in table.Columns
                Console.WriteLine(arrRows(i)(column))
             Next column
          Next i
       Next row
    Next relation
End Sub

注解

DataTable还包含 DataRelation 由属性返回的对象的集合 ChildRelations 。The DataTable also contains a collection of DataRelation objects that is returned by the ChildRelations property.

使用 HasVersion 属性来确定是否存在所 DataRowVersion 需的。Use the HasVersion property to determine whether the DataRowVersion that you want exists.

如果 Default 指定了，则使用的版本取决于调用的 RowState 行的 GetChildRows 。If Default is specified, the version that is used depends on the RowState of the row on which GetChildRows is invoked. 如果调用的行 GetChildRows 具有 RowState 、或的，则 Modified New 该行的 Unchanged Current 版本用于提取其当前版本中具有匹配值的相关子行。If the row on which GetChildRows is invoked has a RowState of Modified, New, or Unchanged, the Current version of the row is used for fetching related child rows with matching values in their Current versions. 如果调用的行的为 GetChildRows RowState ，则该行的 Deleted Original 版本用于提取其原始版本中具有匹配值的相关子行。If the row on which GetChildRows is invoked has a RowState of Deleted, the Original version of the row is used for fetching related child rows with matching values in their original versions.

另请参阅

• ChildRelations
• DataRelation
• DataRowVersion
• GetParentRow(String)
• GetParentRows(String)
• Relations
• 在 ADO.NET 中使用数据集Using DataSets in ADO.NET

public:
 cli::array <System::Data::DataRow ^> ^ GetChildRows(System::String ^ relationName, System::Data::DataRowVersion version);

public System.Data.DataRow[] GetChildRows (string? relationName, System.Data.DataRowVersion version);

public System.Data.DataRow[] GetChildRows (string relationName, System.Data.DataRowVersion version);

member this.GetChildRows : string * System.Data.DataRowVersion -> System.Data.DataRow[]

Public Function GetChildRows (relationName As String, version As DataRowVersion) As DataRow()

参数

返回

DataRow[]

一个 DataRow 对象数组，或长度为零的数组。An array of DataRow objects or an array of length zero.

例外

注解

DataTable还包含 DataRelation 由属性返回的对象的集合 ChildRelations 。The DataTable also contains a collection of DataRelation objects that is returned by the ChildRelations property.

使用 HasVersion 属性来确定是否存在所 DataRowVersion 需的。Use the HasVersion property to determine whether the DataRowVersion that you want exists.

如果 Default 指定了，则使用的版本取决于调用的 RowState 行的 GetChildRows 。If Default is specified, the version that is used depends on the RowState of the row on which GetChildRows is invoked. 如果调用的行 GetChildRows 具有 RowState 、或的，则 Modified New 该行的 Unchanged Current 版本用于提取其当前版本中具有匹配值的相关子行。If the row on which GetChildRows is invoked has a RowState of Modified, New, or Unchanged, the Current version of the row is used for fetching related child rows with matching values in their Current versions. 如果调用的行的为 GetChildRows RowState ，则该行的 Deleted Original 版本用于提取其原始版本中具有匹配值的相关子行。If the row on which GetChildRows is invoked has a RowState of Deleted, the Original version of the row is used for fetching related child rows with matching values in their original versions.