Compare dates in DataView.RowFilter?

问题

I am scratching my head over something rather stupid yet apparently difficult.

DataView dvFormula = dsFormula.Tables[0].DefaultView;
dvFormula.RowFilter = "'" + startDate.ToString("yyyyMMdd") + "' < EndDate OR EndDate = '19000101'";
dvFormula.Sort = "FromDate ASC";

The result is this:

Cannot perform '<' operation on System.String and System.DateTime.

Please tell me what the best way to solve this problem would be.

Much appreciated!

回答1:

You need to wrap your dates with #, not apostrophes.

dvFormula.RowFilter = "#" + startDate.ToString("MM/dd/yyyy") + "# < EndDate OR EndDate = #1/1/1900#"; 

回答2:

This is the solution. Try this:

filter = " (Date >= #" +
         Convert.ToDateTime(txtFromDate.Text).ToString("MM/dd/yyyy") +
         "# And Date <= #" +
         Convert.ToDateTime(txtToDate.Text).ToString("MM/dd/yyyy") +
         "# ) ";

回答3:

Depending on your data provider, you may need to escape dates with the # character rather than the ' character. In addition, I would format your dates in the format YYYY-MM-DD to ensure it can be recognized as a date correctly.

来源：https://stackoverflow.com/questions/3584571/compare-dates-in-dataview-rowfilter