CurrencyManager.Position Property
Important
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Gets or sets the position you are at within the list.
public:
virtual property int Position { int get(); void set(int value); };
public override int Position { get; set; }
member this.Position : int with get, set
Public Overrides Property Position As Integer
A number between 0 and Count minus 1.
The following code examples use the Position property to allow navigation through a list.
private:
void MoveNext( CurrencyManager^ myCurrencyManager )
{
if ( myCurrencyManager->Count == 0 )
{
Console::WriteLine( "No records to move to." );
return;
}
if ( myCurrencyManager->Position == myCurrencyManager->Count - 1 )
{
Console::WriteLine( "You're at end of the records" );
}
else
{
myCurrencyManager->Position += 1;
}
}
void MoveFirst( CurrencyManager^ myCurrencyManager )
{
if ( myCurrencyManager->Count == 0 )
{
Console::WriteLine( "No records to move to." );
return;
}
myCurrencyManager->Position = 0;
}
void MovePrevious( CurrencyManager^ myCurrencyManager )
{
if ( myCurrencyManager->Count == 0 )
{
Console::WriteLine( "No records to move to." );
return;
}
if ( myCurrencyManager->Position == 0 )
{
Console::WriteLine( "You're at the beginning of the records." );
}
else
{
myCurrencyManager->Position -= 1;
}
}
void MoveLast( CurrencyManager^ myCurrencyManager )
{
if ( myCurrencyManager->Count == 0 )
{
Console::WriteLine( "No records to move to." );
return;
}
myCurrencyManager->Position = myCurrencyManager->Count - 1;
}
private void MoveNext(CurrencyManager myCurrencyManager){
if(myCurrencyManager.Count == 0) {
Console.WriteLine("No records to move to.");
return;
}
if (myCurrencyManager.Position == myCurrencyManager.Count - 1){
Console.WriteLine("You're at end of the records");
}
else{
myCurrencyManager.Position += 1;
}
}
private void MoveFirst(CurrencyManager myCurrencyManager){
if(myCurrencyManager.Count == 0) {
Console.WriteLine("No records to move to.");
return;
}
myCurrencyManager.Position = 0;
}
private void MovePrevious(CurrencyManager myCurrencyManager){
if(myCurrencyManager.Count == 0) {
Console.WriteLine("No records to move to.");
return;
}
if(myCurrencyManager.Position == 0) {
Console.WriteLine("You're at the beginning of the records.");
}
else{
myCurrencyManager.Position -= 1;
}
}
private void MoveLast(CurrencyManager myCurrencyManager){
if(myCurrencyManager.Count == 0) {
Console.WriteLine("No records to move to.");
return;
}
myCurrencyManager.Position = myCurrencyManager.Count - 1;
}
Private Sub MoveNext(ByVal myCurrencyManager As CurrencyManager)
If myCurrencyManager.Count = 0 Then
Console.WriteLine("No records to move to.")
Exit Sub
End If
If myCurrencyManager.Position = myCurrencyManager.Count - 1 Then
MessageBox.Show("You're at end of the records")
Else
myCurrencyManager.Position += 1
End If
End Sub
Private Sub MoveFirst(ByVal myCurrencyManager As CurrencyManager)
If myCurrencyManager.Count = 0 Then
Console.WriteLine("No records to move to.")
Exit Sub
End If
myCurrencyManager.Position = 0
End Sub
Private Sub MovePrevious(ByVal myCurrencyManager As CurrencyManager)
If myCurrencyManager.Count = 0 Then
Console.WriteLine("No records to move to.")
Exit Sub
End If
If myCurrencyManager.Position = 0 Then
MessageBox.Show("You're at the beginning of the records.")
Else
myCurrencyManager.Position -= 1
End if
End Sub
Private Sub MoveLast(ByVal myCurrencyManager As CurrencyManager)
If myCurrencyManager.Count = 0 Then
Console.WriteLine("No records to move to.")
Exit Sub
End If
myCurrencyManager.Position = myCurrencyManager.Count - 1
End Sub
An important property of the CurrencyManager class is the Position property. In a list of items, you can view only one item out of the entire list. To determine which item is viewed, set the Position to a number between 0 (the beginning of the list) and Count minus 1 (the end of the list).
Therefore, the Position determines the currency, or place in the list, of all controls bound to the same CurrencyManager. For example, imagine a list consisting of two columns called "FirstName" and "LastName". Two TextBox controls are bound to the same list; the first control is bound to the first column, and the second control is bound to the second column. When the Position of the common CurrencyManager is set to the third position, both controls display the appropriate values for that position in the list. In other words, if the item at position three consists of the first name "John" and the last name "Smith", the bound controls will display "John" and "Smith".
Προϊόν | Εκδόσεις |
---|---|
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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