I know that the problem is my field having NULL values. However, I don't know how to have it process the code even if the field have nullshere's my code:
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I am trying to insert data from a booking reservation into my database.
MySQL = "Insert into [RestaurantSteakHouse].[dbo].[reservation]([customerid],[reservationdate],[noofguests],[notes],[tableid]) values (" & id & ",'" + Session("ReservationDate") + "'," & Session("Noofguests") & ",'" + Session("Notes") + "','" + Session("TableId")
+ "');select @@identity"
Operator '&' is not defined for string "Insert into [RestaurantSteakHous" and type 'ListItem'.
I have a gridview which I'm trying to get the display of phonenumbers listed in a certain display format; (xxx) xxx-xxxx.If I have the code such as this, it displays the unformatted phone number and (000) 000-0000 for the null items.
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Basically, what I did is that: I have a table in SQL database and some of data fields allow null. I built Objectdatasource through dataset. When I built update page using dataset. It generate the following error before showing the update page correctly. It seems I have issue to retrieve the null value from the database through using objectdatasource through dataset. Any suggestions?An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code
View 6 RepliesI'm trying to get a value from a database and I'm getting an error, see code below:
[Code]....
I get and error when I'm trying to convert the value out of the stored procedure to the string SNAME. Error is as follows:
'Conversion from type 'DBNull' to type 'String' is not valid.'
and the stored procedure is as follows:
[Code]....
I have a web in ASP.NET AND CODE IN VB MY DATABASE IS ACCESS WHICH WAS CREATED INITIALLY AND OLD DATA IS ACCESSED FROM THIS ACCESS DATABASE.
THE PROBLEM IS WHEN THE FIELD IS BLANK THE FOLLOWING ERROR COMES
Conversion from type 'DBNull' to type 'String' is not valid.
MY CODE IS AS UNDER
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Dim PNO As String = inputtxt.Text
Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:awingAWing.mdb"
Dim con As OleDbConnection = New OleDbConnection(connectString)
con.Open()
Dim qstr As String
qstr = "select * from PersData where PNO='" + inputtxt.Text + "'"
[Code] .....
I am trying to write a table output from SQL database to a gridview/ Data List through an Object Data Source. I am a new starter and your help will be useful.
public List<Staff> GetStaff()
cmd.CommandType =
SqlConnection con =
new
SqlConnection(connectionstring);SqlCommand cmd =
new
[code]...
Conversion from type 'DBNull' to type 'String' is not valid
Dim OledbString As String = ("SELECT Product_Hierarchy,Model,Origin,Item_Code,Description,Price_USD FROM [sheet1$]")
'Dim eAdapter As New SqlDataAdapter(sqlString, connection)
Dim eAdapter As New OleDbDataAdapter(OledbString, connection)
Dim eTable As New DataTable()
eAdapter.Fill(eTable)
Dim i As Integer = 0
[code]...
Error 10 Operator '*' cannot be applied to operands of type 'string' and 'int'
Show Error
Line 85: v1.Text = Convert.ToString(y[0]) + "صوت";.
Line 86: h1.Text = Convert.ToString(Convert.ToInt32((y[0] / tx) * 100));
Line 857: Image1.Width = Convert.ToInt32(h1.Text * 2);
Line 88: v2.Text = Convert.ToString(y[1]) + "صوت";
Line 89: h2.Text = Convert.ToString(Convert.ToInt32((y[1] / tx) * 100));
[Code]....
I am moving a website to a new framework. But the old site is in vb and the new on I'm coding it in C#.
I have this line of code that I can't figure out, This is on the aspx page. It's in a datagrid as well.
[Code]....
The line that is messing up is the second to last one where it starts with </a>(<%#Math.Round....
Here is the error I get...CS0019: Operator '/' cannot be applied to operands of type 'object' and 'int'
I've tried to work around it but can't fix this
I am binding SQL data to a GridView. The GridView's DataKeyNames property is set to the SQL column called "utID"
I know that within the SQL results, some of the utID values are NULL. After databinding to the GridView, I need to enumerate through the GridViewRows an read the DataKey values. However, when I try this I get the following error:
No default member found for type 'DBNull'. I am using the code below.
What object types are stored within DataKeys (I thought it was just integers or strings)
How to handle a NULL datakey value to prevent this error occurring?
I don't want to use Try Catch because it's too much of a 'hack'
[Code]....
I get the error - Conversion from type 'DBNull' to type 'Integer' is not valid. - on the line.....
Dim newid As Integer = e.Command.Parameters("@latestRowId").Value.........in vb code behind.
I have the identical code for another page with the exception of the field names and it works fine. The only thing I did differently, as far as I know, is I copied the asp and code behind from the page that works into this page and manually changed the field and table names. I don't know what the problem is. Does anyone see any problems?
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I have a FormView that allows a user to register for a company event. I want to do a couple of things with this form.
1. I need to write this data to a MS SQL database
2. I need to send an email confirmation of their registration to their email.
I know how to do both of these things, but i am having trouble doing both at the same time.
It would be nice if I could do it in one click, but I coded it into two pages to try to help simplify it.
The first page allows the user to input their information into a formview and when they click the submit button, it places those answers into session variables:
[Code]....
[Code]....
The Second page confirms the users information by taking those session variables and placing them into labels:
[Code]....
[Code]....
However, after I place information into the formview on the first page, it throws up this error:
"Conversion from type 'TextBox' to type 'String' is not valid".
I'm trying to pass email addresses from an array to a stored procedure, then display the results in my gridview. I get the following error:No mapping exists from object type System.String[] to a known managed provider native type.On this line: Dim DR As SqlDataReader = MyCommand.ExecuteReader
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i am trying to export a table from access database to excel sheet but i am facing error saying Type 'System.Data.OleDb.OleDbCommand' is not defined.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim AccessConn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:Documents and SettingsUSERDesktopD0605data.accdb")
AccessConn.Open()
'New sheet in Workbook
Dim AccessCommand As New System.Data.OleDb.OleDbCommand("SELECT * INTO [Excel 8.0;DATABASE=C:Documents and SettingsUSERDesktopD0605data1.xlsx;HDR=NO;].[Sheet1] from [Table1]", AccessConn)
AccessCommand.ExecuteNonQuery()
AccessConn.Close()
End Sub
End Class
I have a strange problem. I am adding a LinqDatasource object, and set the context:
[Code]....
Then I get this error:The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
On web.config I already have this:
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
NOTE: The datacontext is in a different project (DLL proect) where I added a refernce to System.Data.Linq.
is there another way adding a refernce to a web project? or only though teh web.config?
I have this error "The given value of type String from the data source cannot be converted to type datetime of the specified target column." when I used sqlbulkcopy to do the transaction
Here is my code:
[code]....
I am LINQ querrying against a datatable. However, I am unsuccessfull with catching null values. Here is my code that is giving me the following error.
[Code]....
I am checking to see if minperc is null. However to check that it still is trying to convert the value to double. Cant figure out a way around it. Here is the error: Cannot cast DBNull.Value to type 'System.Double'. Please use a nullable type.
I am trying to create a type of table on sql 2008. The following sql fails saying Incorrect syntax near the keyword 'AS'. what i am doing wrong as this looks fine to me.
View 1 Repliesam having a class which contains user defined data type property. I have created an instance of that class. When I bind that object of that class to DetailsView it is showing all properties except user defined data type property. Here is the sample code.
public class Customer
public string CustomerName { get; set; }
public int Age { get; set; }
public Address CustomerAddress { get; set; }
}
Address class looks like
public class Address
{
[code]...
I created DBML file inside DLL. compiled it and added a reference to it into a website project.When try from webproject to use the DLL I get error.
[Code]....
I've been successful in creating GridView controls programically using c#. I'd like to take advantage of using the clientmode=predicatable but I can't resolve setting the ClientIDRowSuffix value. Below is a code snippet:
public void GenerateView(int fileno, string GridType, GridView dataView)
{
object ctrl = FindControl("pnlForm");
System.Web.UI.WebControls.Panel ctrlPanel = (System.Web.UI.WebControls.Panel)ctrl;
dataView.Width = 640;
dataView.ForeColor = System.Drawing.Color.Black;
dataView.BackColor = System.Drawing.Color.Beige;
dataView.AutoGenerateColumns = false;
dataView.Caption = "<B> indicate your selection by typing Add of Delete in the Action box below</B>";
//Resulted in the following error
// Cannot implicitly convert type 'string' to 'string[]
// dataView.ClientIDRowSuffix = "CTR_SEQ";
// I also tried casting it
// CS0030: Cannot convert type 'string' to 'string[]'...........................................
I am getting an error when attempting to call a stored proc from my asp.net page.
e.Message = "Conversion failed when converting character string to smalldatetime data type."
The stored proc is being called by:
The asp.net code that is calling the stored proc is:
[Code]....
I have a simple test page in asp.net 3.5 vb with a button and a label. The code behind is;
[Code]....
I get a compliation error - Type 'MessageQueue' is not defined.I thought it was, since I have imported System.Messaging.
im doing a registering user by the admin and i trying to use random generated password and send to the user e-mail
This the 1st time i use this MailMesage thing found from the internet
I follow accordingly but found some problem with the method for MailMessage. Below is my code
The problem is the MailAddress it say Type 'MailAddress' is not defined, and
SmtpDeliveryMethod - Name 'SmtpDeliverMethod' is not declared
[Code]....