DataRow.GetParentRow Method

Reference

Definition

Namespace:: System.Data

Assembly:: System.Data.Common.dll

Assembly:: System.Data.dll

Assembly:: netstandard.dll

Important

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Gets the parent row of a DataRow.

Overloads

GetParentRow(DataRelation)	Gets the parent row of a DataRow using the specified DataRelation.
GetParentRow(String)	Gets the parent row of a DataRow using the specified RelationName of a DataRelation.
GetParentRow(DataRelation, DataRowVersion)	Gets the parent row of a DataRow using the specified DataRelation, and DataRowVersion.
GetParentRow(String, DataRowVersion)	Gets the parent row of a DataRow using the specified RelationName of a DataRelation, and DataRowVersion.

GetParentRow(DataRelation)

Source:: DataRow.cs

Source:: DataRow.cs

Source:: DataRow.cs

Gets the parent row of a DataRow using the specified DataRelation.

public:
 System::Data::DataRow ^ GetParentRow(System::Data::DataRelation ^ relation);

public System.Data.DataRow? GetParentRow (System.Data.DataRelation? relation);

public System.Data.DataRow GetParentRow (System.Data.DataRelation relation);

member this.GetParentRow : System.Data.DataRelation -> System.Data.DataRow

Public Function GetParentRow (relation As DataRelation) As DataRow

Parameters

relation: DataRelation

The DataRelation to use.

Returns

DataRow

The parent DataRow of the current row.

Exceptions

ArgumentNullException

The relation does not belong to the DataTable.

-or-

The row is null.

DataException

A child row has multiple parents.

InvalidConstraintException

This row does not belong to the child table of the DataRelation object.

RowNotInTableException

The row does not belong to a table.

Examples

The following example uses the GetParentRow to return the child DataRow objects for every child DataRelation in a DataTable. The value of each column in the row is then printed.

private void GetParentRowForTable(DataTable thisTable,
    DataRelation relation)
{
    if(thisTable ==null){return;}
    // For each row in the table, print column 1
    // of the parent DataRow.
    DataRow parentRow;
    foreach(DataRow row in thisTable.Rows)
    {
        parentRow = row.GetParentRow(relation);
        Console.Write("\table child row: " + row[1]);
        Console.Write("\table parent row: " + parentRow[1]+ "\n");
    }
}

private void CallGetParentRowForTable()
{
    // An example of calling the function.
    DataTable thisTable = DataSet1.Tables["Products"];
    DataRelation relation = thisTable.ParentRelations[0];
    GetParentRowForTable(thisTable, relation);
}

Private Sub GetParentRowForTable _
   (thisTable As DataTable, relation As DataRelation)
    If thisTable Is Nothing Then
        Return
    End If
    ' For each row in the table, print column 1 
    ' of the parent DataRow.
    Dim parentRow As DataRow
    Dim row As DataRow
    For Each row In  thisTable.Rows
        parentRow = row.GetParentRow(relation)
        Console.Write(ControlChars.Tab & " child row: " _
           & row(1).ToString())
        Console.Write(ControlChars.Tab & " parent row: " _
           & parentRow(1).ToString() & ControlChars.Cr)
    Next row
End Sub
  
Private Sub CallGetParentRowForTable()
    ' An example of calling the function.
    Dim thisTable As DataTable = DataSet1.Tables("Products")
    Dim relation As DataRelation = thisTable.ParentRelations(0)
    GetParentRowForTable(thisTable, relation)
End Sub

Remarks

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

Applies to

GetParentRow(String)

Source:: DataRow.cs

Source:: DataRow.cs

Source:: DataRow.cs

Gets the parent row of a DataRow using the specified RelationName of a DataRelation.

public:
 System::Data::DataRow ^ GetParentRow(System::String ^ relationName);

public System.Data.DataRow? GetParentRow (string? relationName);

public System.Data.DataRow GetParentRow (string relationName);

member this.GetParentRow : string -> System.Data.DataRow

Public Function GetParentRow (relationName As String) As DataRow

Parameters

relationName: String

The RelationName of a DataRelation.

Returns

DataRow

The parent DataRow of the current row.

Exceptions

ArgumentException

The relation and row do not belong to the same table.

DataException

A child row has multiple parents.

RowNotInTableException

The row does not belong to the table.

Examples

The following example uses the GetParentRow to print a value from each parent row of each DataRow in a DataTable.

private void GetParentRowForTable(
    DataTable thisTable, string relation)
{
    if(thisTable ==null){return;}
    // For each row in the table, print column 1
    // of the parent DataRow.
    DataRow parentRow;
    foreach(DataRow row in thisTable.Rows)
    {
        parentRow = row.GetParentRow(relation);
        Console.Write("\table child row: " + row[1]);
        Console.Write("\table parent row: " + parentRow[1]+ "\n");
    }
}

private void CallGetParentRowForTable()
{
    // An example of calling the function.
    DataTable thisTable = DataSet1.Tables["Products"];
    DataRelation relation = thisTable.ParentRelations[0];
    GetParentRowForTable(thisTable, relation.RelationName);
}

Private Sub GetParentRowForTable( _
    thisTable As DataTable, relation As String)
     If thisTable Is Nothing Then
         Return
     End If

     ' For each row in the table, print column 1 
     ' of the parent DataRow.
     Dim parentRow As DataRow
     Dim row As DataRow
     For Each row In  thisTable.Rows
         parentRow = row.GetParentRow(relation)
         Console.Write(ControlChars.Tab + " child row: " _
            + row(1).ToString())
         Console.Write(ControlChars.Tab + " parent row: " _
            + parentRow(1).ToString() + ControlChars.Cr)
     Next row
End Sub    
    
Private Sub CallGetParentRowForTable()
     ' An example of calling the function.
     Dim thisTable As DataTable = DataSet1.Tables("Products")
     Dim relation As DataRelation = thisTable.ParentRelations(0)
     GetParentRowForTable(thisTable, relation.RelationName)
End Sub

Remarks

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

Applies to

GetParentRow(DataRelation, DataRowVersion)

Source:: DataRow.cs

Source:: DataRow.cs

Source:: DataRow.cs

Gets the parent row of a DataRow using the specified DataRelation, and DataRowVersion.

public:
 System::Data::DataRow ^ GetParentRow(System::Data::DataRelation ^ relation, System::Data::DataRowVersion version);

public System.Data.DataRow? GetParentRow (System.Data.DataRelation? relation, System.Data.DataRowVersion version);

public System.Data.DataRow GetParentRow (System.Data.DataRelation relation, System.Data.DataRowVersion version);

member this.GetParentRow : System.Data.DataRelation * System.Data.DataRowVersion -> System.Data.DataRow

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

Parameters

relation: DataRelation

The DataRelation to use.

version: DataRowVersion

One of the DataRowVersion values specifying the version of the data to get.

Returns

DataRow

The parent DataRow of the current row.

Exceptions

ArgumentNullException

The row is null.

-or-

The relation does not belong to this table's parent relations.

DataException

A child row has multiple parents.

InvalidConstraintException

The relation's child table is not the table the row belongs to.

RowNotInTableException

The row does not belong to a table.

VersionNotFoundException

The row does not have this version of data.

Examples

The following example uses the GetParentRow to return the child DataRow objects for every child DataRelation in a DataTable. The value of each column in the row is then printed.

private void GetParentRowForTable(DataTable thisTable,
    DataRelation relation,
    DataRowVersion version)
{
    if(thisTable ==null){return;}
    // For each row in the table, print column 1 of the
    // parent DataRow.
    DataRow parentRow;
    foreach(DataRow row in thisTable.Rows)
    {
        parentRow = row.GetParentRow(relation, version);
        Console.Write("\table child row: " + row[1]);
        Console.Write("\table parent row: " + parentRow[1]+ "\n");
    }
}

private void CallGetParentRowForTable()
{
    // An example of calling the function.
    DataTable thisTable = DataSet1.Tables["Products"];
    DataRelation relation = thisTable.ParentRelations[0];
    // Print only original versions of parent rows.
    GetParentRowForTable(thisTable, relation,
        DataRowVersion.Original);
}

Private Sub GetParentRowForTable _
    (thisTable As DataTable, relation As DataRelation, _
    version As DataRowVersion)
    If thisTable Is Nothing Then
        Return
    End If

    ' For each row in the table, print column 1 
    ' of the parent DataRow.
    Dim parentRow As DataRow
    Dim row As DataRow
    For Each row In  thisTable.Rows
        parentRow = row.GetParentRow(relation, version)
        Console.Write(ControlChars.Tab & " child row: " & _
            row(1).ToString())
        Console.Write(ControlChars.Tab & " parent row: " _
            & parentRow(1).ToString() & ControlChars.Cr)
    Next row
End Sub

Private Sub CallGetParentRowForTable()
    ' An example of calling the function.
    Dim thisTable As DataTable = DataSet1.Tables("Products")
    Dim relation As DataRelation = thisTable.ParentRelations(0)

    ' Print only original versions of parent rows.
    GetParentRowForTable(thisTable, relation, _
        DataRowVersion.Original)
End Sub

Remarks

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

Use the HasVersion property to determine whether the DataRowVersion that you want exists.

Applies to

GetParentRow(String, DataRowVersion)

Source:: DataRow.cs

Source:: DataRow.cs

Source:: DataRow.cs

Gets the parent row of a DataRow using the specified RelationName of a DataRelation, and DataRowVersion.

public:
 System::Data::DataRow ^ GetParentRow(System::String ^ relationName, System::Data::DataRowVersion version);

public System.Data.DataRow? GetParentRow (string? relationName, System.Data.DataRowVersion version);

public System.Data.DataRow GetParentRow (string relationName, System.Data.DataRowVersion version);

member this.GetParentRow : string * System.Data.DataRowVersion -> System.Data.DataRow

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

Parameters

relationName: String

The RelationName of a DataRelation.

version: DataRowVersion

One of the DataRowVersion values.

Returns

DataRow

The parent DataRow of the current row.

Exceptions

ArgumentException

The relation and row do not belong to the same table.

ArgumentNullException

The relation is null.

DataException

A child row has multiple parents.

RowNotInTableException

The row does not belong to the table.

VersionNotFoundException

The row does not have the requested DataRowVersion.

Examples

The following example uses the GetParentRow to print a value from each parent row of each DataRow in a DataTable.

private void GetParentRowForTable(DataTable thisTable,
    string relation, DataRowVersion version)
{
    if(thisTable ==null){return;}
    // For each row in the table, print column 1
    // of the parent DataRow.
    DataRow parentRow;
    foreach(DataRow row in thisTable.Rows)
    {
        parentRow = row.GetParentRow(relation, version);
        Console.Write("\t child row: " + row[1]);
        Console.Write("\t parent row: " + parentRow[1]+ "\n");
    }
}

private void CallGetParentRowForTable()
{
    // An example of calling the function.
    DataTable thisTable = DataSet1.Tables["Products"];
    DataRelation relation = thisTable.ParentRelations[0];

    // Print only original versions of parent rows.
    GetParentRowForTable(thisTable, relation.RelationName,
        DataRowVersion.Original);
}

Private Sub GetParentRowForTable _
    (thisTable As DataTable, relation As String, _
    version As DataRowVersion)
     If thisTable Is Nothing Then
         Return
     End If
     ' For each row in the table, print column 1 
     ' of the parent DataRow.
     Dim parentRow As DataRow
     Dim row As DataRow
     For Each row In  thisTable.Rows
         parentRow = row.GetParentRow(relation, version)
         Console.Write(ControlChars.Tab & " child row: " _
            & row(1).ToString())
         Console.Write(ControlChars.Tab & " parent row: " _
            & parentRow(1).ToString() & ControlChars.Cr)
     Next row
End Sub
   
Private Sub CallGetParentRowForTable()
     ' An example of calling the function.
     Dim thisTable As DataTable = DataSet1.Tables("Products")
     Dim relation As DataRelation = thisTable.ParentRelations(0)
     ' Print only original versions of parent rows.
     GetParentRowForTable(thisTable, relation.RelationName, _
        DataRowVersion.Original)
End Sub

Remarks

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

Use the HasVersion property to determine whether the DataRowVersion that you want exists.

Applies to

इसके माध्यम से साझा किया गया

DataRow.GetParentRow Method

Definition

Overloads

GetParentRow(DataRelation)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

GetParentRow(String)

Parameters

Returns

Exceptions

Examples

Remarks

Applies to

GetParentRow(DataRelation, DataRowVersion)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

GetParentRow(String, DataRowVersion)

Parameters

Returns

Exceptions

Examples

Remarks

Applies to

अतिरिक्त संसाधन