Forms Data Controls :: No Default Member Found For Type 'Integer'?

Aug 13, 2010

I'm trying to retrieve selected DataKeyValue and I'm getting this error.


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Forms Data Controls :: GridView.DataKey Error: No Default Member Found For Type 'DBNull'?

Sep 16, 2010

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'


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Web Forms :: Public Member Value On Type String Not Found

Mar 23, 2012

 Public Sub gridedit_DeleteCommand(ByVal sender As Object, ByVal e As DataGridCommandEventArgs)
        Dim con As New SqlConnection(GetConnectionString())
        Dim U_ID As String = gridedit.DataKeys(e.Item.ItemIndex).Value.ToString
  cmd.CommandText = " Delete from AtdWeekend where  WeekendID=" & U_ID
        cmd.Connection = con

[Code] ...

Data save in table in WeekendID as char format so here it gives error how can I resolve it...

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Web Forms :: Public Member 'Text' On Type 'String' Not Found?

Sep 2, 2010

This is driving me nuts. I'm trying to make a better search function for my database. I've had this working before but for the life of me I can't see where the problem is.

The error is: Public member 'Text' on type 'String' not found.


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Forms Data Controls :: Display Label Based On Comparison Of Found Integer Data Fields

Feb 11, 2010

I am trying to reconstruct a date/time period from five data elements Year, StartMonth, StartDate, EndMonth, EndDate If the event starts on June 5 and ends on June 6, 2010 - The label would read June 5 thru 6, 2010. If the event starts on June 30 and ends on July 2, 2010 - the Label would read June 30 thru July 2, 2010. and if the event starts on June 5 and ends on June 5, 2010 - The label would read June 5, 2010. I've tried a few variations without success. This one comes closest to what I'm aiming for.


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DataSource Controls :: Conversion From Type 'DBNull' To Type 'Integer' Is Not Valid?

Jan 22, 2010

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") 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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DataSource Controls :: The Null Value Cannot Be Assigned To A Member With Type System.Decimal Which Is A Non-nullable Value Type

Dec 22, 2010

I am making a website to store invoices so i can mail them to clients. So i got a table for clients, invoices and one with invoice products/services. When an invoice has no products/services added to them and it returns null i get the error "the null value cannot be assigned to a member with type System.Decimal which is a non-nullable value type."

I just started with linq. Before i always used mysql. Mostly i just had to call data from 1 table so forgive me if my linq query isn't really correct.

Dim invoices = From i In db.invoices _
Group Join p In db.products On Equals p.invoiceId Into invoiceProducts = Group _
Select New With {i.client.naam, i.titel, (From iP In invoiceProducts Select iP.prijs).Sum}

i show the client's name, the title of the invoice and the total amount the clients will need to pay for products and services.

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DataSource Controls :: How To Pass Integer Data Type To Store Proc

Jan 1, 2011

I have int datatype declared in my store proc.

When I try to pass parameter from code behind in sqldatasource as :

I get error "
Error converting data type nvarchar to int. "

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Forms Data Controls :: Default Message If No Records Found?

Nov 12, 2010

I have a textbox quering a DB and showing the results in a gridview. If no records are found, instead of the present blank response, how can I put up a default message saying no records were found.

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Forms Data Controls :: Conversion From String "given_name" To Type 'Integer' Is Not Valid?

Jul 6, 2010

Just a bit of infor before we get to the code...

This is all in the Code Behind under the Page Load function.

Basically, I'm trying to convert an ASP page into ASP.NET. I've worked with ASP and PHP a lot more than I have with ASP.NET and I'm just having trouble with the syntax.

Here is the code:


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Forms Data Controls :: Type Or Namespace Name 'StringWriter' Couldn't Be Found

Mar 8, 2011

i am trying to write a gridview to an excell file, but i get the error: The type or namespace name 'StringWriter' could not be found (are you missing a using directive or an assembly reference?)

my code is:

protected void Button1_Click(object sender, EventArgs e)
//Clear content of buffer stream
//Set the type and filename
Response.AddHeader("TITLE", "TITLE.xls");
Response.Charset = "iso-8859-2";
Response.ContentType = "application/vnd.xls";
// Add the HTML from the GridView to a StringWriter to write it out later
StringWriter sw = new StringWriter();HtmlTextWriter htw = new HtmlTextWriter(sw);
//Write out the data

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Forms Data Controls :: Display Default Image When Image (file) Not Found GridView - ImageField

Mar 26, 2010

I have a page which displays details and a pictures of employees. The details are stored in a SQL database and the images are on the server. How can I set a default Image to display (e.g. an Image saying "Awaiting Image") if an employee picture is missing?

I can't use NullImageUrl as the Images are not stored in the database. I can't use the solution found on [URL] as an ImageField does not accept an ID attribute.


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DataSource Controls :: Changing Paramter Type Of Integer To String?

May 20, 2010

How can I change the parameter value from Interger to String.
Here below is the part of the code that creates problem; the constant "sqlStatement" is as string, but when the parameters "@ProdColor" read the value it returns an integer instead of the proper type which is a string. I have tried every ting like: CType(sqlStatement(splitItems(1)), string)
Or convert or parse, but it keeps returning the wrong type.

Const sqlStatement As String = "INSERT INTO ProductDetails (ProdID,ProdColor,ProdSize) VALUES"
If item.Contains(",") Then
splitItems = item.Split(",".ToCharArray)
cmd.Parameters.AddWithValue("@ProdID", SqlDBType.Int).Value = sqlStatement(splitItems(0))
cmd.Parameters.AddWithValue("@ProdColor", SqlDBType.NVarchar).Value = sqlStatement(splitItems(1))
cmd.Parameters.AddWithValue("@ProdSize", SqlDBType.NVarchar).Value = sqlStatement(splitItems(2))

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WCF / ASMX :: Data Type In Data Member?

May 5, 2010

is there something special with other data type beside string in the data contract? I have two properties with decimal and datatime datatype. Everytime I change the value (either in client side and server side), the changed value will not be reflected in the other end (say if the client changes the value then the service will not see the changes). However, everything works ok for string datatype.

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Set The Default Value Of An Integer?

Feb 7, 2010

I've implemented URL routing in my application and the URLHandler class I have for this particluar module will lookup the FolderID and place it in HttpContext.Items

On the page that user ends up with has the following code:


My question is this: what if there's an error and intFolderID does not get a value assigned to it. I'd like to at least instantiate it and give it a value of 0 so that I can do some validation. How do I assign a default value of 0 to this variable?

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Data Source Name Not Found And No Default Driver Specified?

Jul 20, 2010

The Error

ERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified

The Story

I've written a page outside of Visual Web Developer 2010 that uses a SqlDataSource object along with a FormView object that works perfect. Building upon those awesome skills I obtained I started to build a project within Visual Web Developer, this time creating an Empty Web Application and went along my happy way building my new site. I used the same techniques and almost the same code as before - just pointing to a different table but I was met with the aforementioned error message.

The Confusing part

Here's the puzzling part - if I take my page I wrote outside of Visual Web Developer, again - it works perfect - no complaints, and add it as a page to the project I've built it now presents the same error message and I have no idea why.

The Tests Completed

I've backed off of targeting .NET 4.0 framework and went to 2.0 as I am not using any specific 4.0 controls or methods at this time. I've taken my page that originally gave me issue and recreated it outside of a Visual Web Developer project and instead as a stand alone page and the exact same code - copy, cut, paste - works perfect!

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ADO.NET :: EntityDataSource And Integer Default Value?

Feb 5, 2011

i'm using an entitydatasource to save an entity which has an nullable integer property with the default value 0,this property is bound to a textbox in a formview.I assume that when I leave the textbox blank the datasource should understand that I want the property to have null and set it to 0 by default, but it acts different way, it doesn't save the enity at all and gives the entity in Updated and Inserted events as null:


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Databases :: Data Source Name Not Found And No Default Driver Specified?

Jan 19, 2010

I get this error message when I connect to the data source on localhostERROR [IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specifiedthe connection string is

connectionString="Data Source=DRIVER={MySQL ODBC 3.51 Driver};SERVER=localhost;PORT=3306; DATABASE=database;UID=xxx;PWD=xxx;OPTION=3;pooling=false;"

it must be some kind of problem in the environment since the connection string works on a remote server. I downloaded the driver and added it with the Data source (ODBC) application in the control panel.

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Data Source Name Not Found And No Default Driver Specified (ODBC)?

Jan 3, 2011

I have a ASP.NET webapplication where I use ODBCConnection to connect a MySQL server, it will take the connectionstring from the web.config file and this works grate.

But when I put the same code in a WPF application and hardcode the same connection string I get the followin exception when runnint ODBCConnection.Open() :

Data source name not found and no default driver specified

I have checked the ODBCConnection orbject and its instansiated with the exact same connectionstring as in the webapplication.

The connection string looks like this :


The X is set to propert values

I am running both from the same computer so the MYSQL ODBC connection is installed correct.

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Member Names Cannot Be The Same As Their Enclosing Type?

Aug 20, 2010

when i try to run an web application in visual studio 2008.. i got this error...

'PopupWindow': member names cannot be the same as their enclosing type

also while correcting errors my startup web page changed..dont know how to setback the original startup webpage...

public partial class PopupWindow {
/// <summary>
/// frmPopupWindow control.
/// </summary>[code].....

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DBnulls Cannot Be Converted To Type Integer?

Feb 26, 2010

We are using visual studio 2005 and SSMSE for this project. I had already created some pages which is capable of inserting and updating the values on the sql server. After inserting and updating it will redirect to another page to view the result. When I add a homepage, something just mess up. When I insert a new items for the table, it prompts a message, DBnulls cannot be converted to type integer. When I try to check at the sql tables, the data was inserted but I was not able to view the result on the other page.

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Namespace Or Type Specified Doesn't Contain Public Member

Feb 15, 2010

I have created a ASP.NET 3.5 web application and in it I have SearchGridView.vb class file in the directory Old_App_Code. This file creates a namespace MyApp.WebControls, which is also referenced in web.config in a namespace tag, as well as included as an import directive at the beginning of my content page. Unfortunately, I receive the following error: Warning 1 Namespace or type specified in the project-level Imports 'MyApp.WebControls' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. Here's the first several lines of my class file SearchGridView.vb:


why this is happening, as well as possible fixes? I cannot impement the asp:SearchGridView due to this error.

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ADO.NET :: Null Value Cannot Be Assigned To A Member With Type System?

Dec 22, 2010

I am getting an exception on a linq to sql query:The null value cannot be assigned to a member with type System.DateTime which is a non-nullable value type.


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Unable To Print - IsLocked In The Db Is Integer Type?

Feb 16, 2010

I have a method is code behind like this:



but it doesn't print out anything. IsLocked in the db is integer type. It should print out "1" .. If I just do Eval("IsLocked") then it prints out 1..

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DataSource Controls :: The Type Specified In The TypeName Property Of ObjectDataSource Not Found

Jun 26, 2010

I am using Visual Studio 2010 for the first time. I program in MS Access for a long time at decide to move to the ASP world. My problem is that I design my first web .aspx default page with a simple data grid. I decided to connect the data via the business object data adapter. I use the Dataset designer to great the dataset. All looks well and works fine on my PC. But when moved to the server I get the Terror "The type specified in the TypeName property of ObjectDataSource not found".

From my reading for the past two days, it seems that something need to be define (a class of some sort) to let ASP know where to find the data adapter. If this is the case, then why did not Visual Studio 2010 did not automatically build the class in the appropriate BIN/ APP_CODE or Global directory and more importantly, why would it work fine on the PC , but not on the server. I am totally blind-sided by Visual Studio 2010 allowing me to design and test on PC but throws me a curl ball with moving to a server. Am I assuming to much from Visual Studio 2010???

What is the solution.. What I am looking for is to know where exactly where and how to write this class. I am so new to ASP, all of my reading just confusing me more and more by reading so many post on this error. I know it is probably a simple class to write somewhere, but why did not Visual Studio 2010 write it accordingly.

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