I have an italian format datetime string like this:
23/03/2012
the sql command of this update is this in the datetime part:
DateTime.ParseExact(Reg_tes.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture)
This works on my Sql server(Italian language) but if i make this on my server(English language) gives me this error:
"the conversion of a varchar data type to a datetime data type
resulted in an out-of-range value"
How can I resolve this?
You should always use parameterized queries to prevent sql-injection and localization issues like this.
So i assume that you are passing this datetime as string to the database.
using(var con = new SqlConnection("connection-string"))
using(var cmd = new SqlCommand("UPDATE dbo.TableName SET DateColumn=#DateColumn WHERE PK=#PK", con))
{
DateTime reg_tes = DateTime.ParseExact(Reg_tes.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);
cmd.Parameters.AddWithvalue("#DateColumn", reg_tes);
// other parameters ...
con.Open();
int affected = cmd.executeNonQuery();
}
Related
I have a column of data type datetime in my table and I would like to insert a date value from a text box into the table but I am getting this error:
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value
Here is my code:
string prfer_date = txtDT_Particip.Text;
int userId = 0;
string constr = ConfigurationManager.ConnectionStrings["mycon"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("Insert_User"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#FullName", txtFName.Text.Trim());
cmd.Parameters.AddWithValue("#PreferredDateStart", prfer_date.ToString());
}
}
}
it is failing at prfer_date. Thanks for your help
One thing that I missed in your question is, prefer_date is of type string. AddwithValue infers type from the field type, so at SQL end it will treat it as nvarchar and hence the error. What you need is:
cmd.Parameters.Add(new SqlParameter("#PreferredDateStart", SqlDbType.DateTime)
{ Value = prefer_date });
Or you can parse your string to a DateTime object and then use AddWithValue like:
cmd.Parameters.AddWithValue("#PreferredDateStart",DateTime.Parse(prefer_date));
Considering that prefer_date contains a value that can be successfully parsed by DateTime.Parse.
SQL Datetime has a range of "January 1, 1753, through December 31, 9999"
If you do something like this in SQL:
select convert(datetime, '1665-01-01 00:00:00')
Then you get the error:
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value.
I am trying to insert date in my database table through a textbox. But even if I am converting the string into Datetime I am still getting this error :
"The conversion of a nvarchar data type to a datetime data type resulted in an out-of-range value".
I have taken datetime datatype in my database. This is my code :
try
{
SqlCommand cmd = new SqlCommand(#"INSERT INTO tblProject(project_starting_date,project_ending_date)values(#projectstartingdate,#projectendendingdate)", objconn);
//cmd.Parameters.AddWithValue("#projectstartingdate", DateTime.Parse(txtStartingdate.Text).ToString());
//cmd.Parameters.AddWithValue("#projectendendingdate", DateTime.Parse(txtProjectendingdate.Text).ToString());
DateTime stdate;
if(DateTime.TryParse(txtStartingdate.Text, out stdate))
{
//cmd.Parameters.AddWithValue("#projectstartingdate",stdate);
SqlParameter projstrtdate = new SqlParameter("#projectstartingdate", SqlDbType.DateTime);
projstrtdate.Value = stdate;
cmd.Parameters.Add(projstrtdate);
}
DateTime enddate;
if (DateTime.TryParse(txtProjectendingdate.Text, out enddate))
{
//cmd.Parameters.AddWithValue("#projectendendingdate", enddate);
SqlParameter projenddate = new SqlParameter("#projectendendingdate", SqlDbType.DateTime);
projenddate.Value = enddate;
cmd.Parameters.Add(projenddate);
}
if (objconn.State == ConnectionState.Closed)
{
objconn.Open();
}
norowaffected = cmd.ExecuteNonQuery();
objconn.Close();
}
catch (Exception ex)
{
Response.Write( ex.ToString());
}
Please guide me where I am doing wrong?
Probably your locale configuration is trying to convert the data string in a wrong unexpected format.
Try with the following:
if(DateTime.TryParse(txtStartingdate.Text, out stdate)
{
SqlParameter projectStartingDateParam = new SqlParameter("#projectstartingdate", SqlDbType.DateTime);
projectStartingDateParam.Value = stdate;
cmd.Parameters.Add(projectStartingDateParam);
}
Do the same with "projectendingdate". Create a SqlParameter with SqlDbType equals to SqlDbType.DateTime and add it to the query command (cmd variable).
If this dosen't work, double check your table structure if it's in DateTime format.
Do a manually insert directly in database via SQL Server Management Studio.
I had the same problem before. I fixed it by deleting the corresponding columns in the data base and recreate it with the correct format "so date time for you". problem was fixed.
it seems there is still information in the data base telling what format it was before.
I use GETDATE() in a SQL Server stored procedure to insert a date into the SQL Server database table.
After that I need to implement a C# function which is based on datetime input parameter finds if the date was saved in the tables.
The datetime in C# and SQL are different. How do I convert from C# datetime to SQL datetime which has a form of yyyy-mm-ddT:yy:mm:ss.mmm? I need to specify explicitly yyyy-mm-ddT:yy:mm:ss.mmm.
Will be happy for all propositions/possible ways.
DateTime in .Net framework and SQL Server (if it is DateTime type field) is irrespective of the format. Format is only useful for displaying output.
If your field in SQL Server is of DateTime type then you can query it from C# code using parameterized query something like:
public DataTable GetRecords(DateTime dtParameter)
{
DataTable dt = null;
using (SqlConnection conn = new SqlConnection("connection string"))
{
using (SqlCommand cmd = new SqlCommand("SELECT * from yourTable where DateField = #dateparameter"))
{
conn.Open();
cmd.Parameters.AddWithValue("#dateparameter",dtParameter);
SqlDataReader dr = cmd.ExecuteReader();
//...rest of the code
dt.Load(dr);
}
}
return dt;
}
Datetimes between C# and SQL are 100% compatible. The format shouldn't make any difference if you are passing them as DateTimes. If you are generating a SQL string then I would highly recommend changing to SQL Parameters so you don;t have to worry about any formatting issues.
A datetime has no format at all, it has a value. SQL-DateTimes and C# DateTimes are compatible. So don't convert it (to string) at all but pass it as datetime-parameter to the database.
Then you're safe if the DateTime value is within SqlDateTime.MinValue(January 1, 1753) and SqlDateTime.MaxValue(December 31, 9999).
You should never write DateTime.Now from client code to insert into the database as this will be based on the clients local time; do this
public DateTime GetDatabaseTime()
{
var parameter = new SqlParameter("time", SqlDbType.DateTime2)
{
Direction = ParameterDirection.Output
};
using (var connection = new SqlConnection(ConnectionString))
{
connection.Open();
using (var command = new SqlConnection("SELECT #time = SYSDATETIME()", connection))
{
command.ExecuteNonQuery();
}
}
return (DateTime)parameter.Value;
}
Also you should never use DATETIME in SQL Server you should always use DATETIME2 as DATETIME is less accurate than C#::DateTime and it will lead to rounding errors. I know this from bitter experience.
If you are using Entity Framework, and your database is using datetime and not datetime2, the trick is to use SqlDateTime to match the fact that .Net goes to nanosecond, versus sql's millisecond precision. You can use your DateTime variable in .net.. for a SqlDateTime instance, and then you can uniquely identify a record down to the millisecond.
System.Data.SqlTypes.SqlDateTime entry2 = new System.Data.SqlTypes.SqlDateTime(new DateTime(dto.LookUpDateTime));
DateTime entry = entry2.Value;
var existticket = from db in context.Tickets
where db.LookupDateTime == entry && db.UserId == UserId
select db;
I am capturing the time in the text box (by using AJAX calender extender)
the time in the string is 12/10/2013, but when I assign the string to a datetime object it is converted into 12/10/2013 12:00:00 AM.
I want to use the date to filter the records in the database using the query below. Please help
string date1 = txtDate1.Text;
DateTime date = DateTime.ParseExact(txtDate1.Text, "MM/dd/yyyy",
System.Globalization.CultureInfo.InvariantCulture);
string strQuery = "SELECT Story.UserName,Story.StoryId,COUNT(Likes.StoryID) AS NumberOfOrders
FROM Likes LEFT JOIN Story ON Likes.StoryId=Story.StoryId and liked=" + date1 + "
GROUP BY Story.StoryId,Story.UserName order by NumberOfOrders DESC ;";
It's generally not a good idea to pass dates as strings in your queries because you will most likely run into formatting issues - leave it up to the Framework you are using decide on what the best format is.
In your circumstances, you can do this by using SqlParameters e.g.
DateTime date = DateTime.ParseExact(txtDate1.Text, "MM/dd/yyyy", CultureInfo.InvariantCulture);
string strQuery = "SELECT Story.UserName, Story.StoryId, COUNT(Likes.StoryID) AS NumberOfOrders
FROM Likes LEFT JOIN Story ON Likes.StoryId=Story.StoryId and liked=#dateTime
GROUP BY Story.StoryId,Story.UserName order by NumberOfOrders DESC";
using (SqlConnection connection = new SqlConnection("..."))
{
using (SqlCommand cmd = new SqlCommand(strQuery, connection))
{
cmd.Parameters.AddWithValue("#dateTime", date);
connection.Open();
SqlDataReader reader = cmd.ExecuteReader();
...
}
}
Another important reason to use parameters when writing raw SQL is to ensure your user input is correctly sanatized and safe to pass to the DB. Failure to do this can leave you open to various exploitations such as SQL Injection.
Instead of DateTime object you can use Date object.
DateTime is an integer interpreted to represent both parts of DateTime (ie: date and time). You will always have both date and time in DateTime.
ex:
DateTime.Now.ToString("MM/dd/yyyy");
I'm calling a stored procedure from my code using SqlCommand, some of the parameters are of DateTime type, when calling the procedure from Management Studio I use the following format yyyy-MM-dd for example 2011-01-01, and results are returned accordingly.
In my C# code I'm creating the DateTime object like the following:
DateTime dateFrom = new DateTime(2011,01,01);
and when I run the application the dates are being complete ignored and all the data is being returned. After the debugging accordingly I'm noticing that the format of the DateTime object is being: {01/01/2011 00:00:00} so probably this is causing the issue.
The parameters are being added to SqlCommand like this:
cmd.Parameters.AddWithValue("#DateFrom", SqlDbType.DateTime);
Any idea please?
Copying code:
using (SqlConnection conn = new SqlConnection(connectionString))
{
DateTime dateFrom = new DateTime(2011,01,01);
DateTime dateTo = new DateTime(2011, 01, 31);
SqlCommand cmd = new SqlCommand(strStoredProcName, conn);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("#DateFrom", SqlDbType.DateTime);
cmd.Parameters.AddWithValue("#DateTo", SqlDbType.DateTime);
cmd.Parameters["#DateFrom"].Value = dateFrom;
cmd.Parameters["#DateTo"].Value = dateTo;
}
There should be no format issue from C# to SQL for date time data type.
There may be 2 things causing this issue:
As far I can remember, you not need to add # for the parameter name
cmd.Parameters.AddWithValue("DateFrom", SqlDbType.DateTime);
The overload of AddWithValue is string parameterName and object value. You have passed SqlDbType.DateTime as the value. Pass your DateTime variable instead.
you have two options either choose Add or AddWithValue with following format:
1) cmd.Parameters.Add("#DateFrom", SqlDbType.DateTime).Value = dateFrom;
2) cmd.Parameters.AddWithValue("#DateFrom", dateFrom);
If the datetime parameter in stored procedure is type of DateTime, you need not to essentially pass the value as datetime. You can pass simple string value like below:
cmd.Parameters.Add("#DateFrom", SqlDbType.DateTime).Value = "23-03-2013";