Pass a null date to a crystal report parameter using SetParameterValue

Question

I have a situation where I have a crystal report where I pass in a start and end date via rdoc.SetParameterValue this works fine, except that, I do not want it to show a date if I pass nothing for the date variable, I just want it to be blank

To an attempt to do so i have written

    if (DateStart != defaultDate)
    {
        rdoc.SetParameterValue("DStart", DateStart);
    }else
    {
        rdoc.SetParameterValue("DStart", "");
    }

Which gives me the error The types of the parameter field and parameter field current values are not compatible of course, this makes sense because I am trying to set a date to a string variable. However, I am unable to think of a solution, nor do I see any solution in the Parameter's menu.

Appreciate it if I be given some assistance to solve this.

Regards

Answer 1

You may change the parameter type to string and pass the date as string:

DateStart.ToString()

I don't like this solution, but it works. Usually i just require the date.