在C#ASP.net中将文本框内容转换为日期时间格式时出错
您好，我正在开发一个应用程序，因为我需要将日期存储在SQLServer2005数据库中，该数据库是从前端的文本框中检索的。在前端，用户可以从jQueryUIDatePicker插件中选择日期在C#ASP.net中将文本框内容转换为日期时间格式时出错,c#,asp.net,datetime,culture,C#,Asp.net,Datetime,Culture,您好，我正在开发一个应用程序，因为我需要将日期存储在SQLServer2005数据库中，该数据库是从前端的文本框中检索的。在前端，用户可以从jQueryUIDatePicker插件中选择日期 Dim dt As New DateTime Dim txtDateFromUser As String = "04/09/2014" If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
String was not recognized as a valid DateTime.
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
db.eventDate = DateTime.Parse(txtDate.Text, new CultureInfo("en-US").DateTimeFormat);
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
最好将
DateTime.ParseExact Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
db.eventDate = DateTime.ParseExact(txtDate.Text, "MM/dd/yyyy", CultureInfo.InvariantCulture);
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
试试这个..对我来说很好
Convert.ToDateTime(txtDate.Text,System.Globalization.CultureInfo.GetCultureInfo("en-US").DateTimeFormat);
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
您应该使用DateTime.TryParse（表达式）或将对DateTime.Parse的调用包装在try/catch块中。只是出于兴趣，你能发布一些转换日期的例子吗？它们是美国格式的，对吗？希望下面的代码对您有所帮助
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
create table tblDateTime (dtTestDate datetime)
我只是在代码中更改了jQueryUIDatePicker的日期格式。之前它是英国格式，所以我在将数据保存到数据库时出错。但一旦我把它改成我们的格式，它就可以正常工作了
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
Dim dt As New DateTime
Dim txtDateFromUser As String = "04/09/2014"
If DateTime.TryParse(txtDateFromUser, dt) = True Then
Dim connStr As String
connStr = System.Configuration.ConfigurationManager.ConnectionStrings("youConnectionStringName").ConnectionString
'Insert into database
Dim sqlconn As New SqlConnection
sqlconn.ConnectionString = connStr
Dim sqlcmd As New SqlCommand("insert into tblDateTime (dtTestDate) values ('" + dt.ToString() + "')")
sqlconn.Open()
sqlcmd.Connection = sqlconn
sqlcmd.ExecuteNonQuery()
End If
string yourDate = txtDate.Text;
string formattedDate = yourDate.ToString("dd-MM-yyyy");
DateTime dt = DateTime.ParseExact(formattedDate , "dd-MM-yyyy", CultureInfo.InvariantCulture);
嗨，杰米姆，谢谢你的及时回复。我尝试了你的建议，但仍然得到了相同的错误。在数据库中，默认值为1/1/1900 12:00:00 am。在我的应用程序中，用户将从JQuery UI日期选择器中选择日期，该日期将采用2014年4月14日的格式，我试图在插入数据库之前将此数据从textbox转换为代码中的有效日期时间类型。不正确。在DateTime.TryParse周围有一个try-catch块不会引发异常。TryParse正是这样做的-尝试解析给定的datetime值，如果成功则返回true，如果不成功则返回false。请重新阅读我写的内容，我说的是“将调用包装到datetime.parse到try/catch块中”，而不是datetime。TryParse请确保输入是您尝试为指定的cultureinfo转换的正确格式。您提供的输入格式是什么？例如：如果我从jQueryUIDatePicker中选择一个日期，它将类似于文本框中的2014年4月14日。我正在尝试将文本框数据（即2014年4月14日）转换为日期时间格式。对。这正是它不起作用的原因——您的格式是英国格式。您需要为它提供uk格式，以便它可以将其解析为正确的datetime格式（在本例中），然后将其转换为us格式。但是，在jquery ui选取器中，我确信您可以将默认输入类型/格式设置为en us，然后将格式正确设置为us格式，然后您的解析将正常工作，文本框日期的格式为2014年4月14日，在将其转换为日期时间类型后，它将保持类似于1/1/0001 12:00 AMyes，因为这是无法解析时的默认值（我相信）。就像我说的，照我的建议去做Hi@Damith，我也试过你的代码。现在我遇到了类似于
的错误，该字符串表示的日期时间在calendar System.Globalization.GregoriaCalendar中不受支持。