Mysterious FormatException for Convert.ToInt32()... - ASP.NET Discussion Boards

Re: Calling a Win32 dll from ASP.NET.

Christian Graus16-Jul-09 7:01

Christian Graus

16-Jul-09 7:01

If this is a new question then your other one was off topic. You're basically asking the same thing, which is rude.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: Calling a Win32 dll from ASP.NET.

Christian Graus16-Jul-09 7:00

Christian Graus

16-Jul-09 7:00

Yes, of course you can. Just use p/invoke.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Can’t get GridView RowIndex.

enipla16-Jul-09 5:08

enipla

16-Jul-09 5:08

I have a checkbox in a template field in a gridview.

<asp:TemplateField HeaderText="test templet">
    <ItemTemplate>
        <asp:CheckBox ID="CheckBox2" runat="server" AutoPostBack="True"
            Checked='<%# Bind("Archived") %>' oncheckedchanged="CheckBox2_CheckedChanged"/>
            </ItemTemplate>
</asp:TemplateField>

Oncheckedchanged calls a code behind subroutine. I need to pass that subroutine the GridView datarow index so I can do some test on that particular record. I can’t seem to figure out how to do that.

Thanks

Re: Can’t get GridView RowIndex.

Abhijit Jana16-Jul-09 5:53

Abhijit Jana

16-Jul-09 5:53

Where is your code behind code ?

cheers,
Abhijit
CodeProject MVP
Web Site:abhijitjana.net
My Latest Article : IIS Remote Debugging

Re: Can’t get GridView RowIndex.

enipla16-Jul-09 5:55

enipla

16-Jul-09 5:55

I just figured it out -
simple....

Protected Sub CheckBox2_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim gvRow As GridViewRow
        Dim chkbx As CheckBox
        Dim intRowIndex As Integer

        chkbx = sender
        gvRow = chkbx.Parent.Parent
        intRowIndex = gvRow.RowIndex
' perform work agains that row here
end sub

Thanks for the reply.

Calling functions in a win32 dll from vb.net application.

ashwath197916-Jul-09 5:00

ashwath1979

16-Jul-09 5:00

Hi All,

Please let me know whether we can call functions of a win32 dll from a vb.net application.

Regards,
Ashwath Hegde

Re: Calling functions in a win32 dll from vb.net application.

Abhijit Jana16-Jul-09 5:56

Abhijit Jana

16-Jul-09 5:56

ashwath1979 wrote:
Please let me know whether we can call functions of a win32 dll from a vb.net application.

In ASP.NET ?

cheers,
Abhijit
CodeProject MVP
Web Site:abhijitjana.net
My Latest Article : IIS Remote Debugging

Mysterious FormatException for Convert.ToInt32()...

chanakya3316-Jul-09 4:58

chanakya33

16-Jul-09 4:58

Cheers to all the mavens out there on codeproject!

I've banged my head over this one for some time, and I don't understand the reason for this FormatException (log entry) as thrown by Convert.ToInt32 that uses an input value from an ASP .NET 2.0 form *with* validation:

ERROR 16 Jul 2009 09:01:13,970 (Webpage code-behind class name) - Failed conversion of value
System.FormatException: Input string was not in a correct format.
   at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   at (name of calling function in ASP.NET code-behind)

The code-behind of the web page is as follows:

try
{
    dataObject.Weight = Convert.ToInt32(txbWeight.Text);
}
catch (Exception e)
{
    log.Error("Failed conversion of value", e);
}

And the web page has the following validation for the txbWeight TextBox control:

<asp:CompareValidator runat="server" ControlToValidate="txbWeight" Type="Integer" 
Operator="GreaterThanEqual" ValueToCompare="0" Text="Positive number only for weight."
Display="Dynamic" />

I don't understand why this exception is thrown, because the validator ensures that an integer is being received from the user (txbWeight also has a RequiredFieldValidator). The odd thing is that dataObject receives the value despite the exception being thrown!? I don't believe I need to call Trim(), and trying this in the past did not fix the issue.

Any ideas?

Re: Mysterious FormatException for Convert.ToInt32()...

Christian Graus16-Jul-09 7:04

Christian Graus

16-Jul-09 7:04

Always use int.tryparse, not convert.toint32. Do you have text in there, do you need to tell the validator to accept an empty field ?

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: Mysterious FormatException for Convert.ToInt32()...

chanakya3316-Jul-09 7:41

chanakya33

16-Jul-09 7:41

Thanks for the response Christian. I am indeed using a RequiredFieldValidator for the textbox so it should never recieve an empty input... I can't seem to duplicate this myself in my test environment; it only happens in production so there must be some weird case causing it that I cannot imagine.

Well anyhow, I'll switch over to using Int32.TryParse(...) as you'd suggested; this probably is a better solution and I've had much less frustration on projects by doing the analogous thing with Dictionary<t,t>.TryGet(...).

Cheers,

J. Patel

How I can call a javascript function on Treeview Node Click/Select

Qasim198416-Jul-09 3:23

Qasim1984

16-Jul-09 3:23

Hi
I have a treeview on my webpage which is bound to database. On the selected node it should insert a HTML Span Tag with Node value and and Node Text into freetext box using javascript. Like this one

<Span id="NodeValue">Node Text</span>.

As we can not insert HTML into Freetextbox from codebehind therefore I have Used Javascipt funtion for insert HTML.

I have tested javascript function on button click event it is working fine. Remember that I have pass two parameter to javascipt funtion fieldid and field for NodeValue and NodeText respectively.

How I can call javascipt funtion on Node select event in ASP.Net and How I can set values for parameters of this functions.

The HTML Code is

<asp:TreeView ID="TVSectionContentsList" runat="server" Height="200" Width="200" BorderWidth="2">

<SelectedNodeStyle Font-Bold="True" Font-Underline="True" Font-Italic="true" />

</asp:TreeView>

The javascript function is given below

function insertValue(fieldid, field){

FTB_API[ '<%=FreeTextBox1.ClientID%>'].Focus();

FTB_API['<%=FreeTextBox1.ClientID%>'].InsertHtml('<span id=' + fieldid + '>' + field + '</span>');

window.event.returnValue = false;

FTB_API[

'<%=FreeTextBox1.ClientID%>'].Focus();

}

junk mail problem

Mogamboo_Khush_Hua16-Jul-09 3:12

Mogamboo_Khush_Hua

16-Jul-09 3:12

hi,

I am facing strange problem , when i email the below html body format
in gmail it goes in to inbox, but when i send it to my company id, it goes in junk folder, y it is so??????????

>Thank you for completing the voter registration for the Industry Personality of the Year.
>Please click here <http://localhost/BCIFinalAward/ConfirmVote.aspx?voterid=o3EscXnBscI> to confirm your vote.
a

Re: junk mail problem

Abhishek Sur16-Jul-09 3:18

Abhishek Sur

16-Jul-09 3:18

Is it making Junk in your Company MailBox or in GMail. If you see Gmail, Gmail may check the sender and ignore phishing links provided with the mail.

Check if the IsBodyHtml of the MailMessage object is set to true as well... Smile | :)

And also make proper HTML document always if you set IsBodyHtml to true. Dont put anchor tag inside a plain text email body.

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: junk mail problem

Mogamboo_Khush_Hua16-Jul-09 3:34

Mogamboo_Khush_Hua

16-Jul-09 3:34

Abhishek Sur wrote:
Is it making Junk in your Company MailBox or in GMail

Junk mail is coming in my company mailbox

Abhishek Sur wrote:
Check if the IsBodyHtml of the MailMessage object is set to true as well... Smile Smile

Already done

Abhishek Sur wrote:
And also make proper HTML document always if you set IsBodyHtml to true. Dont put anchor tag inside a plain text email body.

Cannot understand i am attaching my my code 4r ur reference.

try
        {
            string authUser = System.Configuration.ConfigurationSettings.AppSettings["MailServerUserName"].ToString();
            string authPass = System.Configuration.ConfigurationSettings.AppSettings["MailServerPassword"].ToString();
            string domain = System.Configuration.ConfigurationSettings.AppSettings["Domain"].ToString();
            NetworkCredential authenticatedMail;
            if(domain != "")
                authenticatedMail = new NetworkCredential(authUser, authPass,domain);
            else
                authenticatedMail = new NetworkCredential(authUser, authPass);

            string SMTPServer = System.Configuration.ConfigurationSettings.AppSettings["MyMailServer"].ToString();
            SmtpClient client = new SmtpClient();
            client.Host = SMTPServer;
            client.Port = Convert.ToInt32(System.Configuration.ConfigurationManager.AppSettings["MyMailServerPort"]);
            MailAddress from = new MailAddress(fromEmailAddress, fromName);
            MailAddress to = new MailAddress(toAddress, toName);
            MailMessage message = new MailMessage(from, to);
            message.Subject = Subject;
            message.Body = MessageBody;
            message.IsBodyHtml = true;
            message.Priority = MailPriority.High;
            client.UseDefaultCredentials = true;
            client.Credentials = authenticatedMail;
            //client.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;
            client.Send(message);
            resultMail = true;
        }

Re: junk mail problem

Mogamboo_Khush_Hua16-Jul-09 3:36

Mogamboo_Khush_Hua

16-Jul-09 3:36

Check how i created body

StringBuilder objMessageBody = new StringBuilder();
                        //objMessageBody.Append("<B> Dear " + txtFirstName.Text + " " + txtLastName.Text);
                        //objMessageBody.Append("</B><br />");
                        objMessageBody.Append("<br />");
                        objMessageBody.Append("Thank you for completing the voter registration for the Industry Personality of the Year.");
                        objMessageBody.Append("<br />");
                        objMessageBody.Append("Please click <a href=" + getConfirmURL(result) + ">here</a> to confirm your vote.");

Re: junk mail problem

Tamer Oz16-Jul-09 3:25

Tamer Oz

16-Jul-09 3:25

Is your from address is a real mail address that is declared in exchange?

Image preview

Rijz16-Jul-09 3:11

Rijz

16-Jul-09 3:11

I am displaying a preview of the Image before uploading it to the server. This works fine with IE6, but not working with newer versions.

The previewing is achieved using an aspx page which has an <asp:image> control. I set the ImageURL property to the "file from the physical location". But in IE7's case, the ImageURL property does not display "file from the physical location".

for instance: <asp:image id ="imgPreview" ImageUrl="file:///D:\image1.jpg">

Kindly provide any help. Thanks in advance.

Regards,
Rijz

Re: Image preview

Abhishek Sur16-Jul-09 3:14

Abhishek Sur

16-Jul-09 3:14

Please change the file path from UNC to Virtual. It will then work. Client site should have permission to show the image directly.

Thumbs Up | :thumbsup:

Abhishek Sur

My Latest Articles
Working with Excel using MDAC

Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: Image preview

Rijz16-Jul-09 3:24

Rijz

16-Jul-09 3:24

Thanks for your reply Abhishek..

I cannot use a Virtual path here because, this path is obtained from a browse button text field. The user will be selecting file from any physical location on the disc and my program is supposed to preview it. It is working fine with IE6... but not in IE7 Frown | :(

How can I achieve this?

Thanks
Rijesh

Re: Image preview

Enver Maroshi16-Jul-09 4:02

Enver Maroshi

16-Jul-09 4:02

I guess it's not working in FF also Smile | :)

This is normal behavior, in IE6 this is security problem. Unless user uploaded something to page, neither JS or ASP should be able to access any information of that file.

All new browsers in FileUpload html element don't anymore show file path, instead only file name.

I think you will have to do it without preview.

Re: Image preview

Rijz16-Jul-09 18:46

Rijz

16-Jul-09 18:46

ohhh..

Anyway thanks enver for your help...

Binding Data from Dataset to asp table

getaccessyr16-Jul-09 2:53

getaccessyr

16-Jul-09 2:53

Hi All,

I need to know,In how many ways we can bind our data to asptable?
Actually,the requirement is explained as follows:
In a shopwebsite,I am planning to show a table which contains 24cells as hours per day and 7 rows as weekdays.In which I need to show opening hours which is getting from the database,as shaded in colors.

Can any one help me?

waiting for your valuable reply

Thanks & Regards
Yamuna

Re: Binding Data from Dataset to asp table

K030616-Jul-09 3:00

K0306

16-Jul-09 3:00

Just try this,you will get more ways to bind data

Bind data to table ASP.NET

Regards,
Karthik K...

Re: Binding Data from Dataset to asp table

Muhammad Mazhar16-Jul-09 3:13

Muhammad Mazhar

16-Jul-09 3:13

Take a look at ASP.NET Calendar control, it might be a good candidate writing a time sheet like thing.

Share your experience with others
Check my Blog...

System.Configuration.ConfigurationManager.AppSettings

Member 426027016-Jul-09 2:14

Member 4260270

16-Jul-09 2:14

Hi,

"System.Configuration.ConfigurationManager.AppSettings" I cannot get ConfigurationManager to show up as an option in intelesense. It shows as an error if I try to use it anyway.

Please help me
Thanks
Denny

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.