CommandHelper
| Name | Value |
|---|---|
| Assembly | Catel.MVVM |
| Namespace | Catel.MVVM |
| Available on | .NET Framework 4.5, .NET Framework 4.6, Portable Class Libraries, Xamarin - Android, Xamarin - iOS |
public static class CommandHelper
Helper class for the Command class.
Methods
CreateCommand(Action execute, Expression<Func<IValidationSummary>> validationSummaryPropertyExpression, object tag)
Creates a new Command that automatically determines whether it can be executed. It does this by checking the right validation summary, which should be in a property..
Parameters
| Name | Description |
|---|---|
| execute | The action to execute when the command is being invoked. |
| validationSummaryPropertyExpression | The validation summary property expression. |
| tag | The tag for the command. |
Returns
The created command.
Exceptions
| Name | Description |
|---|---|
| ArgumentNullException | The execute isnull. |
CreateCommand<TExecuteParameter>(Action<TExecuteParameter> execute, Expression<Func<IValidationSummary>> validationSummaryPropertyExpression, object tag)
Creates a new Missing: <see cref=“T:Catel.MVVM.Command`1” /> that automatically determines whether it can be executed. It does this by checking the right validation summary, which should be in a property..
Type Parameters
TExecuteParameter The type of the execute parameter.
Parameters
| Name | Description |
|---|---|
| execute | The action to execute when the command is being invoked. |
| validationSummaryPropertyExpression | The validation summary property expression. |
| tag | The tag for the command. |
Returns
The created command.
Exceptions
| Name | Description |
|---|---|
| ArgumentNullException | The execute isnull. |
CreateTaskCommand(Func<Task> execute, Expression<Func<IValidationSummary>> validationSummaryPropertyExpression, object tag)
Creates a new TaskCommand that automatically determines whether it can be executed. It does this by checking the right validation summary, which should be in a property..
Parameters
| Name | Description |
|---|---|
| execute | The action to execute when the command is being invoked. |
| validationSummaryPropertyExpression | The validation summary property expression. |
| tag | The tag for the command. |
Returns
The created command.
Exceptions
| Name | Description |
|---|---|
| ArgumentNullException | The execute isnull. |
CreateTaskCommand<TExecuteParameter>(Func<TExecuteParameter, Task> execute, Expression<Func<IValidationSummary>> validationSummaryPropertyExpression, object tag)
Creates a new Missing: <see cref=“T:Catel.MVVM.TaskCommand`1” /> that automatically determines whether it can be executed. It does this by checking the right validation summary, which should be in a property..
Type Parameters
TExecuteParameter The type of the execute parameter.
Parameters
| Name | Description |
|---|---|
| execute | The action to execute when the command is being invoked. |
| validationSummaryPropertyExpression | The validation summary property expression. |
| tag | The tag for the command. |
Returns
The created command.
Exceptions
| Name | Description |
|---|---|
| ArgumentNullException | The execute isnull. |
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