How to handle negative TimeSpan in silverlight

Question

Hi,

    I have two textboxes. One is the Start time and other is the end time. I need to check whether end time is greater than start time. I tried with Time Span but i need to check for Hours, Minutes, Second. If it returns with "(-)" then i need to validate. How to do that. Please find the following code.

.cs
====

DateTime dtStartTime = new DateTime();
                        DateTime dtEndTime = new DateTime();
                        TimeSpan dtDiff = new TimeSpan();

                        dtStartTime = Convert.ToDateTime(txtMonStarttime.Text.Trim());
                        dtEndTime = Convert.ToDateTime(txtMonEndtime.Text.Trim());
                        dtDiff = dtEndTime - dtStartTime;

Here if the dtDiff returns values with negative then i need to check and validate it. Please help.

Thanks,
Vijay

Pravin Ghadge · Answer

Hi Vijay, u can also use: DateTime dtStartTime = new DateTime(); DateTime dtEndTime = new DateTime(); TimeSpan dtDiff = new TimeSpan(); dtStartTime = Convert.ToDateTime(txtMonStarttime.Text.Trim()); dtEndTime = Convert.ToDateTime(txtMonEndtime.Text.Trim()); dtDiff = dtEndTime - dtStartTime; if (dtDiff.Days { validatefunction() }

vijay rags · Answer

Hi, I tried with the following. As of now its working. But i dont know what was the exact impact in futher. I declared a string variable and check for "(-)" symbols using contains and validate it. Please let me know whether this approach is correct or not. string timeSpan=string.Empty; DateTime dtStartTime = new DateTime(); DateTime dtEndTime = new DateTime(); TimeSpan dtDiff = new TimeSpan(); dtStartTime = Convert.ToDateTime(txtMonStarttime.Text.Trim()); dtEndTime = Convert.ToDateTime(txtMonEndtime.Text.Trim()); dtDiff = dtEndTime - dtStartTime; timeSpan=Convert.toString(dtDiff); if(timeSpan.Contains('-')) { //Validate Function Call. }

How to handle negative TimeSpan in silverlight

Insert Link

Embed YouTube Video

Table Options

Insert Image

Answers (2)