I have a form that is passed a phone number and takes the phone number and populates the form. Users make changes and click a button to update the database. I am getting the following error message. I am struggling to understand what I am doing wrong?

Object must implement IConvertible.
Description: 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.

Exception Details: System.InvalidCastException: Object must implement IConvertible.

Source Error:


Line 316: cmd.Parameters("@CB").Value = txtCB.Text
Line 317:
Line 318: cmd.ExecuteNonQuery()
Line 319: Catch exSql As SqlException
Line 320: 'lblError.Text = "ERROR: Unable to update database"


Source File: c:\inetpub\wwwroot\FMS\frmSalesLeadsAdmin.aspx.vb Line: 318

Stack Trace:


[InvalidCastException: Object must implement IConvertible.]
   System.Data.SqlClient.SqlCommand.ExecuteReader(Com mandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream)
   System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
   FMS.frmSalesLeadsAdmin.Update() in c:\inetpub\wwwroot\FMS\frmSalesLeadsAdmin.aspx.vb: 318
   FMS.frmSalesLeadsAdmin.btnUpdate_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\FMS\frmSalesLeadsAdmin.aspx.vb: 383
   System.Web.UI.WebControls.Button.OnClick(EventArgs e)
   System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String eventArgument)
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler sourceControl, String eventArgument)
   System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData)
   System.Web.UI.Page.ProcessRequestMain()


HERE MY CODE FOR UPDATING
Private Sub Update()
        Dim cnn As SqlConnection = New SqlConnection(ConfigurationSettings.AppSettings("C onnectionString"))
        Try
            cnn.Open()
            Dim cmd As SqlCommand = cnn.CreateCommand
            cmd.CommandType = CommandType.StoredProcedure
            cmd.CommandText = "procUpdateSalesLead"

            'pass the phone to database for searching
            cmd.Parameters.Add(New SqlParameter("@Company", SqlDbType.VarChar, 255))
            cmd.Parameters("@Company").Value = txtSearch.Text

            cmd.Parameters.Add(New SqlParameter("@StreetAddress", SqlDbType.VarChar, 255))
            cmd.Parameters("@StreetAddress").Value = txtAddress.Text

            cmd.Parameters.Add(New SqlParameter("@City", SqlDbType.VarChar, 255))
            cmd.Parameters("@City").Value = txtCity

            cmd.Parameters.Add(New SqlParameter("@State", SqlDbType.VarChar, 50))
            cmd.Parameters("@State").Value = cboState.SelectedValue

            cmd.Parameters.Add(New SqlParameter("@Zip", SqlDbType.Int, 4))
            cmd.Parameters("@Zip").Value = CInt(txtZip.Text)

            cmd.Parameters.Add(New SqlParameter("@Phone", SqlDbType.VarChar, 10))
            cmd.Parameters("@Phone").Value = txtPhone.Text

            cmd.Parameters.Add(New SqlParameter("@ContactTypeID", SqlDbType.Int, 4))
            cmd.Parameters("@ContactTypeID").Value = cboContactType

            cmd.Parameters.Add(New SqlParameter("@FaxNumber", SqlDbType.VarChar, 10))
            cmd.Parameters("@FaxNumber").Value = txtFax.Text

            cmd.Parameters.Add(New SqlParameter("@WebAddress", SqlDbType.VarChar, 100))
            cmd.Parameters("@WebAddress").Value = txtURL.Text

            cmd.Parameters.Add(New SqlParameter("@ContactName", SqlDbType.VarChar, 255))
            cmd.Parameters("@ContactName").Value = txtContact.Text

            cmd.Parameters.Add(New SqlParameter("@Title", SqlDbType.VarChar, 50))
            cmd.Parameters("@Title").Value = txtTitle.Text

            cmd.Parameters.Add(New SqlParameter("@Gender", SqlDbType.VarChar, 50))
            cmd.Parameters("@Gender").Value = cboSex.SelectedValue

            cmd.Parameters.Add(New SqlParameter("@NumberOfEmployees", SqlDbType.Int, 4))
            cmd.Parameters("@NumberOfEmployees").Value = CInt(txtNumOfEmpl.Text)

            cmd.Parameters.Add(New SqlParameter("@Revenue", SqlDbType.VarChar, 50))
            cmd.Parameters("@Revenue").Value = txtRev.Text

            cmd.Parameters.Add(New SqlParameter("@Industry", SqlDbType.VarChar, 255))
            cmd.Parameters("@Industry").Value = txtIndustry.Text

            cmd.Parameters.Add(New SqlParameter("@Ext", SqlDbType.Int, 4))
            cmd.Parameters("@Ext").Value = CInt(txtExt.Text)

            cmd.Parameters.Add(New SqlParameter("@AlternativeNumber", SqlDbType.VarChar, 50))
            cmd.Parameters("@AlternativeNumber").Value = txtAlt.Text

            cmd.Parameters.Add(New SqlParameter("@MobilePhone", SqlDbType.VarChar, 10))
            cmd.Parameters("@MobilePhone").Value = txtCell.Text

            cmd.Parameters.Add(New SqlParameter("@EmailAddress", SqlDbType.NVarChar, 100))
            cmd.Parameters("@EmailAddress").Value = txtEmail.Text

            cmd.Parameters.Add(New SqlParameter("@Notes", SqlDbType.VarChar, 255))
            cmd.Parameters("@Notes").Value = txtNotes.Text

            cmd.Parameters.Add(New SqlParameter("@NI", SqlDbType.VarChar, 10))
            cmd.Parameters("@NI").Value = txtNI.Text

            cmd.Parameters.Add(New SqlParameter("@LM", SqlDbType.VarChar, 10))
            cmd.Parameters("@LM").Value = txtLM.Text

            cmd.Parameters.Add(New SqlParameter("@CB", SqlDbType.VarChar, 10))
            cmd.Parameters("@CB").Value = txtCB.Text

            cmd.ExecuteNonQuery()
        Catch exSql As SqlException
            'lblError.Text = "ERROR: Unable to update database"
            lblError.Text = exSql.Message() + "" + exSql.Source() + "" + exSql.StackTrace()
        Finally
            cnn.Close()
            cnn.Dispose()
            cnn = Nothing
        End Try
    End Sub


HERE IS MY STORED PROCEDURE CODE
CREATE PROCEDURE procUpdateSalesLead
(
    @Company varchar(255),
    @StreetAddress varchar(255),
    @City varchar(255),
    @State varchar(55),
    @Zip int,
    @Phone nvarchar(10),
    @ContactTypeID int,
    @FaxNumber nvarchar(10),
    @WebAddress varchar(255),
    @ContactName varchar(255),
    @Title varchar(100),
    @Gender varchar(50),
    @NumberOfEmployees int,
    @Revenue varchar(50),
    @Industry varchar(255),
    @Ext int,
    @AlternativeNumber varchar(10),
    @MobilePhone varchar(10),
    @EmailAddress varchar(255),
    @Notes nvarchar(255),
    @NI varchar(10),
    @LM varchar(10),
    @CB varchar(10)
)
AS
UPDATE tblSalesLeads
SET

             Company = @Company,
    StreetAddress = @StreetAddress,
    City = @City,
    State = @State,
    Zip = @Zip,
    Phone = @Phone,
    ContactTypeID = @ContactTypeID,
    FaxNumber = @FaxNumber,
    WebAddress = @WebAddress,
    ContactName = @ContactName,
    Title = @Title,
    Gender = @Gender,
    NumberOfEmployees = @NumberOfEmployees,
    Revenue = @Revenue,
    Industry = @Industry,
    Ext = @Ext,
    AlternativeNumber = @AlternativeNumber,
    MobilePhone = @MobilePhone,
    EmailAddress = @EmailAddress,
    Notes = @Notes ,
    NI = @NI,
    LM = @LM,
    CB = @CB

WHERE Phone = @Phone
GO

well.. i dont have a clue about your error.. but i can say that using the phone number as the table key is wrong, because the user cannot change it if they make a mistake...

see that if you are trying to update your phone number your SP will fail...



HTH

Gonzalo

I just changed the stored procedure. I didn't want the user to be able to edit the phone number. I just wanted the user to be able to update the record related to a particular phone number. The phone number is used to verify if a client currently exits in the database and prevent duplicate sales leads from getting into the database.

I still get the same error :-(

i think i found your problem..

cmd.Parameters("@City").Value = txtCity has .text missing..

cmd.Parameters("@ContactTypeID").Value = cboContactType has something missing (text?, selectedvalue?)

fix that and tell me...



HTH

Gonzalo

I fixed it. I changed the data type for NI, CB, LM from smalldatetime to varchar and it works fine now.

Hmmmm. The error you got doesn't seem to lend itself to a datatype conversion error. For example, in your stored procedure if you decare and input parameter as smalldatetime and you try to pass in a date of 12/31/2100 your code will throw a SqlEception similiar to this:

Error converting Varchar value to type smalldatetime.

The IConvertiable interface is the interface that allows us to do Convert.ToString() and such and most objects that we work with in .NET implement this interface.

I am in agreeance with Gonzalo here; you definately have some syntax errors and, if just changing your procedure datatypes resovled this problem ,i would check the data you are passing in because it may be invalid. (E.g. your data field may contain System.Windows.Forms.Textbox)

Something doesnt make sense.

-------------------------
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Unless, of course, you want to hire me to do work for you.

^^Thats my signature

mmm.. they were varchar in the code you gave us...
are you sure that was all the problem???

HTH

Gonzalo