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Return DB results within Date Range

In my view, I have an input and select tags for the user to enter a start and end date.
When submitted, The controller will search the Model/Database and return entries within the above range.
In my DB, the start and end dates are written as "nvarchars" and in my controller they are taken as strings
Code and Images for reference:
public ActionResult timePeriod(string time)
{
//Start: month, day, year End: month, day, year --> Numeric values
string[] times = time.Split(',');
string start = times[0] + " " + times[1] + " " + times[2];
string end = times[3] + " " + times[4] + " " + times[5];
//Sample code to test the start date
viewModel.Tasks = db.Tasks.Where(s => s.StartTime.Contains(start)).ToList();
}
a snippet of the Database values:
Are there any LINQ expression to do this?

As the dates are strings, you've nothing better other than using what you have suggested already:
viewModel.Tasks = db.Tasks.Where(s => s.StartTime.Equals(start)).ToList();
I would use Equals as that will be quicker for you. Using Contains is basically like doing a T-SQL LIKE which is much slower.
SELECT *
FROM Table
WHERE StartDate LIKE 'blah'
Using Equals will result in the following equivalent:
SELECT *
FROM Table
WHERE StartDate = 'blah'
Which is much more efficient.

how to calculate total Sum in Excel

I am producing last report for my venture. I need to ascertain the Sum of aggregate cells in my excel sheet. I have done the accompanying code. Be that as it may, its not computing the qualities.. Here is my code:
Worksheet.Cells[20, 16].Formula =
"Sum(" + Worksheet.Cells[6, 16].Value +
":" + Worksheet.Cells[rowIndex, 16].Value + ")";
I need to figure the Cell No 16's Sum esteem and I will show it into Cells[20,16]. Its not working. Anybody help me to settle this?

Change the two occurrences of .Value in your code to .Address.
Update
... and add a = before the Sum:
Worksheet.Cells[20, 16].Formula =
"=Sum(" + Worksheet.Cells[6, 16].Address +
":" + Worksheet.Cells[rowIndex, 16].Address + ")";

graphing non sequential data C# and mysql

I'm trying to display in a graph (Winforms/C#) the total amount from one column vs unit of time (in this case month) - so it would be a amount vs time graph. The problem is that the user would like the freedom of lets say - choosing the totals for January and June and compare them in a single graph (so the total for the month of January would be represented as a bar next to June's total's bar). I already capture the selected months (also, I have the graph control on the for) within a list but where I am really stuck is to build the mysql statement and its something like this
selectdataforGraph = "SELECT SUM(Amount_Net) AS Total FROM testingproject.incomeinformation WHERE date";
foreach (int month in selectedMonth) {
selectdataforGraph += "between '" + selected_year+ "-" + month +
"'-1 AND '" + selected_year + "-"+month+ "-31' AND";
}
I know it has some space missing and some quotation mark problems - already ran the query and I figured as much but I don't think the in-between would work because I don't know how to AND the next part of it so if a user picks May then August would be between 2007-5-01 and 2007-5-30 AND 2007-8-01 and 2007-8-30???

EDIT: didn't seem MySQL was your DB...
Definitely use a parameterized query! However... to fit in with what you have and so you can test it quickly...
I think I would use DATEPART rather than BETWEEN....
var selectdataforGraph = "SELECT SUM(Amount_Net) AS Total FROM testingproject.incomeinformation WHERE ";
var monthList = string.Join(",", selectedMonth);
selectdataforGraph += " YEAR(date) = " + selected_year;
selectdataforGraph += " AND MONTH(date) in (" + monthList + ")";

MS Access statement for selecting data within selected date

I need a statement to select data from an MS Access database table.
WITHIN selected dates
I have two textboxes in my GUI called StartDate and EndDate
I want to select data within those 2 dates.
I have tried 2 methods.
The first is
" DAY(V.RegDate) between " + Start.ToString("dd")
+ " and " + End.ToString("dd");
" and MONTH(V.RegDate) between " + Start.ToString("MM") + " and "
+ End.ToString("MM");
" and YEAR(V.RegDate) between " + Start.ToString("yyyy") + " and "
+ End.ToString("yyyy");
V.RegDate is the date column from the database.
But it returns me no data when I select 01/08/2010 and 01/09/2010 while there is some data at 25/08/2010.
I think that is because I chose the date separately and since the 2 dates are the same,
returns me nothing
I have tried another way...
" V.RegDate between #" + Start.ToString("dd/MM/yyyy") + "# and #" _
+ End.ToString("dd/MM/yyyy") + "#";
This also return me nothing
Any Ideas????

This pattern works for me:
SELECT sometable.somedate
FROM sometable
WHERE (((sometable.somedate) Between #2/1/2010# And #4/1/2010#));
(in this case it's MDY, I normally prefer ISO-ish style - YYYY/MM/DD because there is no way that Access can screw that up)
Maybe you've got your date set using the American default - MDY instead of the British(?) standard DMY.

BindingSource Filter by date

I want to filter values from database based on date.
Date in a database contains values like this: 2008-12-28 18:00:00. And my class has a DateTime variable depending on which I want to filter. Ideally it would work like this:
myBindingSource.Filter = "DATE(myDateField) = myDateTime.Date" + adjusting myDateTime.Date format as needed.
But it throws an EvaluateException: "The expression contains undefined function call DATE()."
Although if I execute the SQL statement directly, I can use the DATE() function in filter.
P.S. I use MYSQL DB with the Connector/Net 5.2
How can I solve this problem?
Thank You all for suggestions.

The getSqlDate function is not needed. You can use String.Format() to format dates:
String.Format("{0:yyyy-MM-dd} 00:00:00", myDateTime)
OR
myDateTime.Date.ToString("yyyy-MM-dd") + " 00:00:00"
You could filter the binding source like this:
myBindingSource.Filter = String.Format("myDateField >= '{0:yyyy-MM-dd}' AND myDateField < '{1:yyyy-MM-dd}'", myDateTime, myDateTime.AddDays(1));

Thank you Tom H.
Yes, i wanted to eliminate the time portion of the datetime in the filter and your suggestion works perfectly.
I`ll leave the complete solution for others:
myBindingSource.Filter = "myDateField >= '" + getSqlDate(myDateTime) + "' AND myDateField < '" + getSqlDate(myDateTime.AddDays(1)) + "'";
where getSqlDate function is:
string getSqlDate(DateTime date) {
string year = "" + date.Year;
string month = (date.Month < 10) ? "0" + date.Month : "" + date.Month;
string day = (date.Day < 10) ? "0" + date.Day : "" + date.Day;
return year + "-" + month + "-" + day + " 00:00:00";
}

A correction to the answer:
Accoring to msdn
,to get the correct date
the mm in
yyyy-mm-dd
would have to be capitalized
like so;
yyyy-MM-dd
to get a correctly formatted date.

Is myDateField the name of the field in the dataset? I think you want an expression like this:
myBindingSource.Filter = "myDateField = " & myDateTime.Date.ToString()

Are you asking how to eliminate the time portion of the datetime in the filter? I'm not too familiar with MySQL, but if you use any kind of function that returns the date portion of a datetime then you are likely to kill any chance of using an index on that column for the query (existing or future index).
Your best bet is to create a filter on the front end that checks for a range that is only for your given filter date. For example:
myBindingSource.Filter = "myDateField >= " & <code to create a string representing 12AM of your date> &
" myDateField < " & <code to create a string for 12AM of the next day>
Sorry for not having exact code, but I'm a SQL developer and my lack of VB/C# skills would require me to take a lot more time to come up with the functions then it would probably take you. :)

For search between two date in DataGridView you can use this code :
BindingSource1.Filter = "F5 >= '" + maskedTextBox1.Text + "' And " + "F5 <= '" + maskedTextBox2.Text + "'";
BindingSource1 : my datagridview datasourc load in BindingSource1 .
F5 : name of your header column in datagridview .
maskedTextBox1 : for get first date .
maskedTextBox2 : for get second date .
Be successfull "Arn_7"

For search between two date in DataGridView you can use this code :
BindingSource1.Filter = "F5 >= '" + maskedTextBox1.Text + "' And " + "F5 <= '" + maskedTextBox2.Text + "'";
BindingSource1 : my datagridview datasourc load in BindingSource1 .
F5 : name of your header column in datagridview .
maskedTextBox1 : for get first date .
maskedTextBox2 : for get second date .

You will need to add signle quotes like this "'2021-09-26'".
myBindingSource.Filter = "myDateField = " + "'" + myDateTime.Date.ToString("yyyy-MM-dd") + "'"