Warning Task
Note
This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Logs a warning during a build based on an evaluated conditional statement.
Parameters
The folowing table describes the parameters of the Warning task.
| Parameter | Description |
|---|---|
Code |
Optional String parameter.The warning code to associate with the warning. |
File |
Optional String parameter.Specifies the relevant file, if any. If no file is provided, the file containing the Warning task is used. |
HelpKeyword |
Optional String parameter.The Help keyword to associate with the warning. |
Text |
Optional String parameter.The warning text that MSBuild logs if the Condition parameter evaluates to true. |
Remarks
The Warning task allows MSBuild projects to check for the presence of a required configuration or property before proceeding with the next build step.
If the Condition parameter of the Warning task evaluates to true, the value of the Text parameter is logged and the build continues to execute. If a Condition parameter does not exisit, the warning text is logged. For more information on logging, see Obtaining Build Logs.
In addition to the parameters listed above, this task inherits parameters from the TaskExtension class, which itself inherits from the Task class. For a list of these additional parameters and their descriptions, see TaskExtension Base Class.
Example
The following code example checks for properties that are set on the command line. If there are no properties set, the project raises a warning event, and logs the value of the Text parameter of the Warning task.
<Project xmlns="https://schemas.microsoft.com/developer/msbuild/2003">
<Target Name="ValidateCommandLine">
<Warning
Text=" The 0 property was not set on the command line."
Condition="'$(0)' == ''" />
<Warning
Text=" The FREEBUILD property was not set on the command line."
Condition="'$(FREEBUILD)' == ''" />
</Target>
...
</Project>