UniqueConstraint 생성자

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::Data::DataColumn ^ column);

public UniqueConstraint (System.Data.DataColumn column);

new System.Data.UniqueConstraint : System.Data.DataColumn -> System.Data.UniqueConstraint

Public Sub New (column As DataColumn)

매개 변수

예제

다음 예제에서는 새 UniqueConstraint 를 만들고 의 속성DataRelation에 ParentKeyConstraint 할당합니다.

Private Sub CreateUniqueConstraint(ByVal dataSetSuppliers As DataSet)
    Dim uniqueConstraint As UniqueConstraint

    ' Get the DataColumn of a table in a DataSet.
    Dim dataColumn As DataColumn
    dataColumn = dataSetSuppliers.Tables("Suppliers").Columns("SupplierID")

    ' Create the constraint.
    uniqueConstraint = New UniqueConstraint("supplierIdConstraint", dataColumn)

    ' Add the constraint to the ConstraintCollection of the DataTable.
    dataSetSuppliers.Tables("Suppliers").Constraints.Add(uniqueConstraint)
End Sub

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(cli::array <System::Data::DataColumn ^> ^ columns);

public UniqueConstraint (System.Data.DataColumn[] columns);

new System.Data.UniqueConstraint : System.Data.DataColumn[] -> System.Data.UniqueConstraint

Public Sub New (columns As DataColumn())

매개 변수

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::Data::DataColumn ^ column, bool isPrimaryKey);

public UniqueConstraint (System.Data.DataColumn column, bool isPrimaryKey);

new System.Data.UniqueConstraint : System.Data.DataColumn * bool -> System.Data.UniqueConstraint

Public Sub New (column As DataColumn, isPrimaryKey As Boolean)

매개 변수

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(cli::array <System::Data::DataColumn ^> ^ columns, bool isPrimaryKey);

public UniqueConstraint (System.Data.DataColumn[] columns, bool isPrimaryKey);

new System.Data.UniqueConstraint : System.Data.DataColumn[] * bool -> System.Data.UniqueConstraint

Public Sub New (columns As DataColumn(), isPrimaryKey As Boolean)

매개 변수

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::String ^ name, System::Data::DataColumn ^ column);

public UniqueConstraint (string? name, System.Data.DataColumn column);

public UniqueConstraint (string name, System.Data.DataColumn column);

new System.Data.UniqueConstraint : string * System.Data.DataColumn -> System.Data.UniqueConstraint

Public Sub New (name As String, column As DataColumn)

매개 변수

예제

다음 예제에서는 새 UniqueConstraint 를 만들고 의 속성DataRelation에 ParentKeyConstraint 할당합니다.

Private Sub CreateUniqueConstraint(ByVal dataSetSuppliers As DataSet)
    Dim uniqueConstraint As UniqueConstraint

    ' Get the DataColumn of a table in a DataSet.
    Dim dataColumn As DataColumn
    dataColumn = dataSetSuppliers.Tables("Suppliers").Columns("SupplierID")

    ' Create the constraint.
    uniqueConstraint = New UniqueConstraint("supplierIdConstraint", dataColumn)

    ' Add the constraint to the ConstraintCollection of the DataTable.
    dataSetSuppliers.Tables("Suppliers").Constraints.Add(uniqueConstraint)
End Sub

추가 정보

• DataRelation
• ParentKeyConstraint
• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::String ^ name, cli::array <System::Data::DataColumn ^> ^ columns);

public UniqueConstraint (string? name, System.Data.DataColumn[] columns);

public UniqueConstraint (string name, System.Data.DataColumn[] columns);

new System.Data.UniqueConstraint : string * System.Data.DataColumn[] -> System.Data.UniqueConstraint

Public Sub New (name As String, columns As DataColumn())

매개 변수

예제

다음 예제에서는 두 개의 열이 있는 를 DataTable 만들고 에 새 UniqueConstraint 를 ConstraintCollection추가합니다.

static private void MakeTableWithUniqueConstraint()
{
    // Create a DataTable with 2 DataColumns.
    DataTable dataTable = new DataTable("dataTable");
    DataColumn idColumn = new DataColumn(
        "id", System.Type.GetType("System.Int32"));
    DataColumn nameColumn = new DataColumn(
        "Name", System.Type.GetType("System.String"));
    dataTable.Columns.Add(idColumn);
    dataTable.Columns.Add(nameColumn);

    // Run procedure to create a constraint.
    AddUniqueConstraint(dataTable);

    // Add one row to the table.
    DataRow dataRow;
    dataRow = dataTable.NewRow();
    dataRow["id"] = 1;
    dataRow["Name"] = "John";
    dataTable.Rows.Add(dataRow);

    // Display the constraint name.
    Console.WriteLine(
        dataTable.Constraints[0].ConstraintName);

    // Try to add an identical row,
    // which throws an exception.
    try
    {
        dataRow = dataTable.NewRow();
        dataRow["id"] = 1;
        dataRow["Name"] = "John";
        dataTable.Rows.Add(dataRow);
    }
    catch (Exception ex)
    {
        Console.WriteLine(
            "Exception Type: {0}", ex.GetType());
        Console.WriteLine(
            "Exception Message: {0}", ex.Message);
    }
}
static private void AddUniqueConstraint(
    DataTable dataTable)
{
    // Create the DataColumn array.
    DataColumn[] dataColumns = new DataColumn[2];
    dataColumns[0] = dataTable.Columns["id"];
    dataColumns[1] = dataTable.Columns["Name"];

    // Create the constraint on both columns.
    UniqueConstraint uniqueConstraint =
        new UniqueConstraint("idNameConstraint", dataColumns);
    dataTable.Constraints.Add(uniqueConstraint);
}

Private Sub MakeTableWithUniqueConstraint()
    ' Create a DataTable with 2 DataColumns.
    Dim dataTable As New DataTable("dataTable")
    Dim idColumn As New DataColumn( _
        "ID", System.Type.GetType("System.Int32"))
    Dim nameColumn As New DataColumn( _
        "Name", System.Type.GetType("System.String"))
    dataTable.Columns.Add(idColumn)
    dataTable.Columns.Add(nameColumn)

    ' Run procedure to create a constraint.
    AddUniqueConstraint(dataTable)

    ' Add one row to the table.
    Dim dataRow As DataRow
    dataRow = dataTable.NewRow()
    dataRow("ID") = 1
    dataRow("Name") = "John"
    dataTable.Rows.Add(dataRow)

    ' Display the constraint name.
    Console.WriteLine(dataTable.Constraints(0).ConstraintName)

    ' Try to add an identical row,
    ' which throws an exception.
    Try
        dataRow = dataTable.NewRow()
        dataRow("ID") = 1
        dataRow("Name") = "John"
        dataTable.Rows.Add(dataRow)
    Catch ex As Exception
        Console.WriteLine("Exception Type: {0}", ex.GetType())
        Console.WriteLine("Exception Message: {0}", ex.Message)
    End Try
End Sub

Private Sub AddUniqueConstraint(ByVal dataTable As DataTable)
    ' Create the DataColumn array.
    Dim dataColumns(1) As DataColumn
    dataColumns(0) = dataTable.Columns("ID")
    dataColumns(1) = dataTable.Columns("Name")

    ' Create the constraint on both columns.
    Dim uniqueConstraint As UniqueConstraint = _
        New UniqueConstraint("idNameConstraint", dataColumns)
    dataTable.Constraints.Add(uniqueConstraint)
End Sub

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::String ^ name, System::Data::DataColumn ^ column, bool isPrimaryKey);

public UniqueConstraint (string? name, System.Data.DataColumn column, bool isPrimaryKey);

public UniqueConstraint (string name, System.Data.DataColumn column, bool isPrimaryKey);

new System.Data.UniqueConstraint : string * System.Data.DataColumn * bool -> System.Data.UniqueConstraint

Public Sub New (name As String, column As DataColumn, isPrimaryKey As Boolean)

매개 변수

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::String ^ name, cli::array <System::Data::DataColumn ^> ^ columns, bool isPrimaryKey);

public UniqueConstraint (string? name, System.Data.DataColumn[] columns, bool isPrimaryKey);

public UniqueConstraint (string name, System.Data.DataColumn[] columns, bool isPrimaryKey);

new System.Data.UniqueConstraint : string * System.Data.DataColumn[] * bool -> System.Data.UniqueConstraint

Public Sub New (name As String, columns As DataColumn(), isPrimaryKey As Boolean)

매개 변수

추가 정보

• 테이블에 제약 조건 추가

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

Source:

UniqueConstraint.cs

public:
 UniqueConstraint(System::String ^ name, cli::array <System::String ^> ^ columnNames, bool isPrimaryKey);

[System.ComponentModel.Browsable(false)]
public UniqueConstraint (string? name, string[]? columnNames, bool isPrimaryKey);

[System.ComponentModel.Browsable(false)]
public UniqueConstraint (string name, string[] columnNames, bool isPrimaryKey);

[<System.ComponentModel.Browsable(false)>]
new System.Data.UniqueConstraint : string * string[] * bool -> System.Data.UniqueConstraint

Public Sub New (name As String, columnNames As String(), isPrimaryKey As Boolean)

매개 변수

특성

BrowsableAttribute

설명

이 생성자는 Visual Studio .NET 환경에서 디자인 타임 지원을 위해 제공됩니다. 이 생성자를 사용하여 만든 UniqueConstraint 개체는 AddRange를 통해 컬렉션에 추가해야 합니다. 지정된 이름의 열은 메서드가 호출될 때 존재해야 합니다. 또는 이 생성자를 호출하기 전에 가 호출된 경우 BeginInit 지정된 이름의 열이 호출될 때 EndInit 존재해야 합니다.

추가 정보

• 테이블에 제약 조건 추가