Showing WDK Popup from TBO（从TBO中返回错误信息到弹出窗口中）

时间：2010-09-12 来源：毁于随

http://www.mydocumentum.net/knowledge-base/46-programming/173-showing-wdk-popup-from-tbo

It is possible to trigger WDK popup from TBO, here is the example how to do it.

First you need to write a TBO, for example, we'll check a attribute maturity_date which is a custom attribute, the rule is simple, the value that assigned to this attribute cannot be less than today. Here is the sample code how we can achieve to show error popup once the user input "wrong value" for this attribute

Create a global variable maturityDateError

1 2	private boolean maturityDateError= false;

Override setString method in the TBO

    @Override
    public void setString( String attributeName, String value ) throws DfException {
        if (attributeName.equalsIgnoreCase( "maturity_date" ))
        {
            SimpleDateFormat dateFormat = new SimpleDateFormat( "MM/dd/yyyy HH:mm:ss aa" );
            try
            {
                Date date = dateFormat.parse( value );
                maturityDateError = date.before( new Date() );
            }
            catch (Exception ex)
            {
                ex.printStackTrace();
            }
        } else
            super.setString( attributeName, value );    
    }

Override doSave method

    @Override
    protected void doSave(boolean keepLock, String versionLabels, Object[] extendedArgs) throws DfException {
        DfLogger.debug(this, "doSave", null, null);
 
        if (maturityDateError)
            throw new DfException("Maturity date cannot be less than today.");
 
        super.doSave(keepLock, versionLabels, extendedArgs);
    }