ConstraintCollection.Clear Method

Clears the collection of any Constraint objects.

[Visual Basic]
Public Sub Clear()
[C#]
public void Clear();
[C++]
public: void Clear();
[JScript]
public function Clear();

Remarks

The CollectionChanged event occurs if this action is successful.

Example

[Visual Basic, C#, C++] The following example clears all constraints from the ConstraintCollection.

[Visual Basic] 

 Public Shared Sub ClearConstraints(ds As DataSet) 
    Dim t As DataTable
    For Each t In ds.Tables
      t.Constraints.Clear()
    Next
 End Sub


[C#] 

 public static void ClearConstraints(DataSet ds) 
 {
    foreach (DataTable t in ds.Tables)
      t.Constraints.Clear();
 }

[C++] 
public:
    static void ClearConstraints(DataSet* ds)
    {
        System::Collections::IEnumerator* myEnum = ds->Tables->GetEnumerator();
        while (myEnum->MoveNext())
        {
            DataTable* t = __try_cast<DataTable*>(myEnum->Current);
            t->Constraints->Clear();
        }

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

See Also

ConstraintCollection Class | ConstraintCollection Members | System.Data Namespace