Write-Warning is a Windows PowerShell command that allows users to display a warning message in the console window. This command is used to alert users of potential issues or risks associated with the current task or operation. The warning message can be customized to include additional information, such as a list of steps to take to avoid the issue. This command is useful for providing users with a heads-up about potential problems they may encounter.
Syntax
The syntax for the Write-Warning command is as follows:
Write-Warning [-Message] <String> [-InformationAction <ActionPreference>] [-InformationVariable <String>] [-Source <String>] [-WhatIf] [-Confirm] [<CommonParameters>]
Parameters
The Write-Warning command has the following parameters:
| Parameter | Description |
|---|---|
| -Message | Specifies the warning message to be displayed. |
| -InformationAction | Specifies how the information is to be handled. The valid values are Continue, Ignore, Inquire, and SilentlyContinue. |
| -InformationVariable | Specifies the name of the variable to receive the information. |
| -Source | Specifies the source of the warning message. |
| -WhatIf | Specifies whether the command should be run without actually executing any operations. |
| -Confirm | Specifies whether the user should be prompted for confirmation before executing the command. |
| <CommonParameters> | This cmdlet supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, WarningVariable, OutBuffer, PipelineVariable, and OutVariable. For more information, see about_CommonParameters. |
Inputs
The Write-Warning command does not accept any input.
Outputs
The Write-Warning command does not generate any output.
Examples
The following example displays a warning message in the console window:
Write-Warning -Message “This operation may cause unexpected results.”
The following example displays a warning message and includes a list of steps to take to avoid the issue:
Write-Warning -Message “This operation may cause unexpected results. To avoid this issue, please follow these steps:`n1. Step 1`n2. Step 2`n3. Step 3”
Tips
When using the Write-Warning command, keep the following tips in mind:
- The warning message should be concise and to the point.
- Include a list of steps to take to avoid the issue, if applicable.
- Be sure to specify the source of the warning message.
- Use the -WhatIf and -Confirm parameters to test the command before executing it.
Conclusion
The Write-Warning command is a useful tool for alerting users of potential issues or risks associated with the current task or operation. This command can be used to display a warning message in the console window and can be customized to include additional information, such as a list of steps to take to avoid the issue. Be sure to use the -WhatIf and -Confirm parameters to test the command before executing it.