How to handle negative TimeSpan in silverlight

vijay rags

14y5.7kC#

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

2 Replies

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Pravin Ghadge14y ago
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 < 0)
                {
                validatefunction()
                }
vijay rags14y ago
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.
                        }