We Keep Coding

C# - SQL filter Date two times with Dapper

I want to receive the data of a defined period, using two DateTimes.
For that I have the following sql query:
public List<Deliveries> GetDeliveriesFilter(DateTime date1, DateTime date2, string text)
{
string q = #"SELECT ...,
d.DesiredDate AS DateOfDelivery,
....
WHERE d.DesiredDate >= #date1 AND d.DesiredDate <= #date2
AND p.Name COLLATE latin1_german1_ci LIKE #text
...";
var result = db.Query<Deliveries>(q, new
{
DateOfDelivery = "%" + date1 + "%",
DateOfDelivery = "%" + date2 + "%",
Name = "%" + text + "%"
...
});
return result.ToList();
}
But I can not declare DateOfDelivery two times.
How can I handle my sql query that the date1 and date2 is set for the delivery date?
With other parameters it is well working.
Kind regards.

You misunderstood something about parameters in SQL/Dapper. The properties of the object you pass in, need to correspond exactly to the parameters you define.
And you cannot surround a Datetime parameter with '%'-characters, that doesn't make sense.
The following will select an interval between the two dates, where Name contains the text1 parameter.
public List<Deliveries> GetDeliveriesFilter(DateTime date1, DateTime date2, string text1)
{
string q = #"SELECT ...,
d.DesiredDate AS DateOfDelivery,
....
WHERE d.DesiredDate >= #date1 AND d.DesiredDate <= #date2
AND p.Name COLLATE latin1_german1_ci LIKE #text
...";
var result = db.Query<Deliveries>(q, new
{
date1,
date2,
text = "%" + text1 + "%"
...
});
return result.ToList();
}
I utilize that when creating a dynamic object, property names can be taken from the variables you pass to it, so the dynamic will have three properties; date1, date2 and text, just like your SQL query..

Inserting multiple values between daterange into DB

i have a form which collects 2 dates (start date & end date) in the format mm/dd/yyyy
I want to collect these 2 dates from the form, and then create a list of all dates between these 2 days, then insert them into seperate rows in mt database. Here is my code:
if(IsPost){
var bookedFrom = Request.Form["dateFrom"];
var bookedTo = Request.Form["dateTo"];
DateTime dateF = Convert.ToDateTime(bookedFrom);
DateTime dateT = Convert.ToDateTime(bookedTo);
var dates = new List<DateTime>();
for (var dt = dateF; dt <= dateT; dt = dt.AddDays(1))
{
dates.Add(dt);
}
foreach(var dat in dates){
db.Execute("INSERT INTO Property_Availability (PropertyID, BookedDate, BookedNotes, BookedType) VALUES (#0, #1, #2, #3)", rPropertyId, dat, Request.Form["BookedNotes"], Request.Form["BookedType"]);
}
}
However, when i try and post my form, i get the following error:
String was not recognized as a valid DateTime.
DateTime dateF = Convert.ToDateTime(bookedFrom);
Any idea where i'm going wrong?
Thanks

Just my 2 cents in help you out, also consider using debug to know whether what values are passed / etc.
if(IsPost){
DateTime pFrom = new DateTime();
DateTime pTo = new DateTime();
var bookedFrom = Request.Form["dateFrom"];
var bookedTo = Request.Form["dateTo"];
if(DateTime.TryParse(bookedFrom, out pFrom) && DateTime.TryParse(bookedTo, out pTo))
{
DateTime dateF = pFrom;
DateTime dateT = pTo;
var dates = new List<DateTime>();
for (var dt = dateF; dt <= dateT; dt = dt.AddDays(1))
{
dates.Add(dt);
}
foreach(var dat in dates){
db.Execute("INSERT INTO Property_Availability (PropertyID, BookedDate, BookedNotes, BookedType) VALUES (#0, #1, #2, #3)", rPropertyId, dat, Request.Form["BookedNotes"], Request.Form["BookedType"]);
}
}
else
{
Response.Write("<script language=javascript>alert('Invalid date from : " + bookedFrom + " and date to : " + bookedTo + "');</script>");
}
}

Based on your exception, you have some problems with format of Request.Form["dateFrom"] value.
For example date in your default locale is supposed to be in format 'dd/mm/yyyy' or something like that.
So if you exactly know format of date in this parameter it's better to use something like that
DateTime dateF = DateTime.ParseExact(bookedFrom, "MM/dd/yyyy", CultureInfo.InvariantCulture);

How Store datetime value in to local datetime variable?

I am stored some value in to session. And retrieve some column datetime value with where clause and use this session value.
Code:
DateTime Currentdate = default(DateTime);
Session["d_id"] = dt.Rows[0]["d_id"];
Currentdate = objdl.GetScalerValue("select IsNull(Max(LoginDate),GETDATE()) from
q_logintrack_panel where Id= '" + Session["d_id"].ToString() + "'");
Here its produce error at 3rd row.
Error: string can not be explicitely convert into system.Datetime.
So please give me the exact solution please...

You need to parse string returned by GetScalarValue to a DateTime object:
DateTime Currentdate = default(DateTime);
Session["d_id"] = dt.Rows[0]["d_id"];
var dtStr = objdl.GetScalerValue("select IsNull(Max(LoginDate),GETDATE()) from q_logintrack_panel where Id= '" + Session["d_id"].ToString() + "'");
Currentdate = DateTime.Parse(dtStr);

c# mysql datetime to unix time

I have the following problem. The timeformat my database gives me back depends on the server settings.
So, if I do this query:
string query = "SELECT d.id, i.name, d.address, d.sensor, d.value, d.made, d.received, s.type, r.name AS room
FROM info AS i
RIGHT JOIN data AS d ON i.address = d.address AND i.sensor = d.sensor
LEFT JOIN sensor_types AS s ON i.type = s.id
LEFT JOIN room AS r ON i.room = r.id
WHERE i.address = '" + address + "'
&& i.sensor = '" + sensor + "'
&& DATE(d.received) BETWEEN '" + start + "' AND '" + end + "'";
On server 1 I get back for today 2013-12-23 2:29:14 and on server 2 I get back 23-12-2013 2:29:14.
In some cases I need the unixtime so I use this function for it, which works fine in case 1 but gives an error in case 2:
public string DateTimeToUnixTime(string text)
{
DateTime myDate = DateTime.ParseExact(text, "yyyy-MM-dd HH:mm:ss",
System.Globalization.CultureInfo.InvariantCulture);
TimeSpan span = (myDate - new DateTime(1970, 1, 1, 0, 0, 0, 0).ToLocalTime());
//return the total seconds (which is a UNIX timestamp)
return ((double)span.TotalSeconds).ToString();
}
What is the best way to fix this?

If you need to convert datetime to unix time.
You can use UNIX_TIMESTAMP() function of MySQL for that.
Try this:
SELECT UNIX_TIMESTAMP(STR_TO_DATE('Dec 23 2013 02:29AM', '%M %d %Y %h:%i%p'))
You can read more here.
Hope that helps! :)

Not saying it's the best way, but if the only possible formats are those two, you could test for one using DateTime.TryParseExact, and if it fails, assume it's the other format.
DateTime myDate;
if (!DateTime.TryParseExact(text, "yyyy-MM-dd HH:mm:ss",
System.Globalization.CultureInfo.InvariantCulture,
DateTimeStyles.None, out myDate);
{
myDate = DateTime.ParseExact(text, "dd-MM-yyyy HH:mm:ss",
System.Globalization.CultureInfo.InvariantCulture);
}

SQL SELECT query not retrieving rows from a simple Access database

The DayDate column in the database is of type DateTime & I'm passing a string formulated using a DateTimePicker in a form. The reader.HasRows always returns false!! I don't know what I'm doing wrong. Any help would be appreciated. The code that I used is below.
if (!this.con.IsConnected())
{
this.con.Connect();
}
this.cmd = new OleDbCommand("SELECT DayNo FROM [Calendar] WHERE DayDate = " + date + "", this.con.conObj());
this.reader = cmd.ExecuteReader();
this.reader.Read();
int dayNo;
if (this.reader.HasRows)
{
dayNo = int.Parse(reader[0].ToString());
}
else
{
throw new InfoException("The system could not locate the date in the system");
}

The problem is your comparing a Date value to a DateTime so in essence you could possibly be comparing values like this:
DayDate = "2011-12-18 14:22:54"
Date = "2011-12-18 00:00:00"
You need to truncate the time part from your DB dates, try something like this:
"SELECT DayNo FROM [Calendar] WHERE dateadd(dd, 0, datediff(dd, 0, DayDate)) = " + date
Or if using SQL Server 2008 you can do:
"SELECT DayNo FROM [Calendar] WHERE cast(DayDate As Date) = " + date