I have some date fields that I want to not have any dates during a record creation. I figured the way to go would be to insert NULL. The way I'm going about it now gives me a Type mismatch error.[code]...
View 2 Repliesi get the date value from other field then need to insert it into other database. but the problem is when the column is null the n it cannot insert it.
View 1 Repliesi have a maskedtextbox which will accept only date in the format of "DD-MM-yyyy" no i want to insert this date in my db. i have done this successfully.
Now i want to insert null value in through that maskedtextbox .
In every date field I have, I cannot update it if it is null. For instance, I have the following query and it will throw an error if the date fields are Null or zero lengths. Any ideas? I try and parse and get the following error: String was not recognized as a valid DateTime. if i don't, it throws a null error.[code]
View 7 RepliesTitle pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
View 20 RepliesIs there way to insert null into mysql from an empty text field in vb.net
View 1 RepliesI'm making a data application and using the data adapters, I created a query in the designer:
EmpActivities_TableAdapter.InsertQuery(IdTextBox.Text, ActivityComboBox.Text, DescriptionTextBox.Text, Cdate(adddate.text))
The question is how can I set the adddate to null or nothing and save it? I'm using SQL server for the data.
I am working asp.net vb application. I have set of values to be inserted to Database.But their some fields are optional to be filled. I need to check the textbox empty. If empty I should not enter the value to Database. How to work on this?
View 4 RepliesNow that I've switched over to parameterized queries, everything is great except along with handling all the special characters that would otherwise disrupt an all text SQL stament, it's handling the word NULL. My code basically does this for every variable used in the entire SQL statement:
If strCallName = "" Then
strCallName = "NULL"
End If
[Code]...
and that worked great for my old all text ones because leaving the word NULL out of single quotes would tell it yeah, that's actually null and pass it a true null value. Now with parameterized ones, it's literally passing it the word NULL I tried just leaving the string empty but then when I try to execute the command, it says that the parameter cannot be a zero length string. So how do you give a null value to a a parameterized query and make it actually send that to the database in the statement? Would strCallName = vbNull work or would it still say it's a zero length string?
How can i remove this in my crystal report . this value is showing if my date field in null . "1/1/1900 12:00:00 AM". I don't want to show thin is my report.I have two dates , case open date and case close date . if the case is not closed its showing this value so i want to remove this.I am using sqlsever.
View 3 RepliesThis video shows how to add validation for a textbox:[URL]..what about date ? I can't make it work for date.
View 2 RepliesI am working with calendar inside GridView using VB. I have some NULL date on the DDBB. I can fix the problem using EVAL, but when I try to save the date from the calendar, I got an error telling me that their is no @variable declared.[code]Everything is fine but I got: Must declare the scalar variable "@tDate" trying to save.This is beacuse I'm not using Bind, but with BIND I cannot run checkDate.
View 1 Repliesi have a datetimepicker with showcheckbox properties set to true..
when there is date in database, the checkbox is checked..
but when the database is null, the checkbox is unchecked..
here's the code:
Sub checkeddate() 'to set DateTimePicker.check (compare from database)
'if db is not null, then CheckBox is checked
If IsDBNull(DataSet.Tables("AssetMaster").Rows.Item(curPosition).Item(19)) = False Then
[Code]....
i have a date control on form (vb.net) and by default its value is current date. i want to make its value to null or empty so that no date is shown and user choose from the drop down date calendar.
View 9 RepliesFix my code I am trying to put null in sql server through a function that is excepting _dtSWO.
If I set _dtSWO = Nothing it returns #12:00:00 AM# which throws an exception. The field is nullable in sql server I just want it to return a blank[code]...
I am using visual studio 2010. I have a text box bound to a sql datetime field.I have to be able to either set or clear the text box. I can set it to any date fine, but when I try to clear it I am unable to save the record.i am using the binding navigator to save.
View 5 RepliesWhy when I try to save a null value from textbox at sql server 0 is saved?
View 2 RepliesI have a smalldatetime column in SQL that can have a null value, but when I try to insert a null value using SqlTypes.SqlDateTime.Null and LINQtoSQL it puts in 1/1/1900 instead of NULL.
What is the best method to insert a null, or am I doing it at the moment. If I am using the correct method at the moment, what should be done to prevent the 1/1/1900 being displayed on my fields in a WPF application.
I have an ASP.NET application that crashes when a null date value is returned.
The code line is:
excelWorksheet.Cells("A" & xlRowCounter).Value = IIf(IsDBNull(dRow("sysdate")), "", Format(dRow("sysdate"), "MM/dd/yyyy"))
Error message:
ERROR: System.ArgumentException: Argument 'Expression' is not a valid value.
How would I check for a null date, and replace it with "" in my app ?
The user will select an entry in a gridview, which then redirects them to a form that is populated with the data from the selected row (thus making the gridview editable in a more user friendly way). Null values are accepted by the DB and I would like to show null date values as blank (or " ") in the corresponding text boxes. Instead I get the error:
Conversion from type 'DBNull' to type 'Date' is not valid.
Here is my code:
'preceded by connection code
Dim sqlcmd As String = "SELECT * from Master WHERE RecNum = @recnum"
'Dim sqlCmd As New OleDb.OleDbCommand("SELECT * from Master WHERE RecNum = @recnum", connection)
Dim FileCommand3 As New OleDb.OleDbCommand(sqlcmd, connection)
[code]....
In my table date value exist in the date filed. I want to remove the date value based on some condition. How it is possible? I used delete command but the entire row was deleted. I tried to update the date as null but it showing conversion errors.
View 12 Repliesi need to pass null value but error dim drf as date
[Code]....
Dim Upd As String ="UPDATE sakit set tanggalsakit'" & drf & "' WHERE orang= '" & id& "'
I have the following query that I use to create a new record in a database. If I leave any field on the form blank, for example, it throws the error "Memo.Lastname" cannot be a zero length string. Other than that the query executes appropriately.
Private Sub cmdSaveMemo_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles cmdSaveMemo.Click
If Len(Me.txtMemoID.Text) <> 0 Then
Memo.SaveMemo
[Code] .....
I have a form and stored procedure that inserts the data from the form. It works fine except that if a field isn't filled in it doesn't insert a NULL into SQL it inserts "".
I've tried a few different ways but none seem to insert NULL, the one below still inserts "", can anyone point me in the right direction?
Here is the required part of the code, if you require more just let me know.
Dim rdr As SqlDataReader
Dim cmdInsert As SqlCommand = New SqlCommand()
cmdInsert.CommandText = "spPersonalDetailsInsert"
[Code].....
So if I enter nothing into address1 field it should write NULL to screen but it always writes NOT NULL. What does an empty form field equal? in classic ASP it was always "".
How can I achieve this. Insert Null Value into SQL Server DateTime Field?
View 5 Repliesmy table is:
CREATE TABLE [dbo].[VarianceReport](
[ID] [int] IDENTITY(1,1) NOT NULL,
[FN] [nvarchar](50) NOT NULL,
[Fdate] [nvarchar](50) NOT NULL,
[code]....
But inserted null value when all textbox is temp!?!How to resolve this problem and best way for this action?
I have a DataSet where I need to filter the collection where one of the date columns is not null.
How do you term this in LINQ?
This is what I have so far but there is a compiler error on the w.CompletedDate field in the Where clause.
Dim completed = From ins In InspectionDataset.Inspection.AsEnumerable _
Where (Function(w) w.CompletedDate IsNot Nothing) _
Order By ins.Field(Of DateTime)("UpdatedDate")
I have also tried it the below way but the compiler will not allow the DBNull comparison.
Dim completed = From ins In Inspection.AsEnumerable _
Where ins.Field(Of DateTime)("CompletedDate") <> DBNull.Value _
Order By ins.Field(Of DateTime)("UpdatedDate")
Attempting to convert a possible null value into date/time field. Any easy way ?
[Code]...
I have a FormView where I pull data from one table (MS Access), and then insert it (plus more data) into another table. I'm having issues with the dates.The first table has two date fields: date_submitted and date_updated. In some records, date_updated is blank. This causes me to get a data mismatch error when attempting to insert into the second table.It might be because I'm databinding the date_updated field from the first table into a HiddenField on the FormView. It then takes the value from the HiddenField and attempts to insert it into the second table:
Dim hfDateRequestUpdated As HiddenField = FormView1.FindControl("hfDateRequestUpdated")
myDateRequestUpdated = hfDateRequestUpdated.Value
'... It then attempts to insert myDateRequestUpdated into the database.
[code].....
My application is asp.net with vb. In my page I have a textbox for passing date. If I didn't enter date and on clicking submit, I have to pass null value to the stored procedure. I tried following codes such as DBNull.Value and DateTime.MinValue. In that case instead of null ,"#12:00:00#" is passing. I have to pass Null.
View 3 Replies