how to display an image from folder when there is no image in database - ASP.NET Discussion Boards

Thanks for gving interest in my problem;

Language: C# with Asp.net using AJAX
After using the update panel including authentication Table(userName,Password)the following error occur; Wats the reason for this Error;

Sys.WebForm.PageRequestManagerParserErrorException:THis msg recieved from the server could not
be parsed.Common cause for this error are when the response is modified by calls to Response.Write(),
response filters,HttpModules.or server trace is Enabled.
Details:Erro parsing near' |<html> <Head> '.

Have you made sure the httpmodules for ajax have been added to the web.config?

I know the language. I've read a book. - _Madmatt

Yes Sir I have already Added to the webconfig.

I'd go with my original response, you are gaining nothing in the login process by trying to use AJAX.

I know the language. I've read a book. - _Madmatt

What code you have written on Button1_Click1 event?

I have used this code;

protected void Button1_Click1(object sender, EventArgs e)
    {

         
        string str = "select * from userlogin where userid='" + this.txtuid.Text + "' and password='" + this.txtpassword.Text + "'";
        OracleDataReader dr = dms_obj.GetDataReader(str);
        if (dr.Read())
        {

            Session["username"] = txtuid.Text;
            string sess = Convert.ToString(Session["username"]);
            Session["password"] = txtpassword.Text;
            string pass = Session["password"].ToString();

            Label1.Visible = true;
            Label1.Text = "Authentication Success";
            txtuid.Text = "";
            txtpassword.Text = "";

          }
        else
        {
            //Alert("Invalid User name/Password");
            Label1.Text = "InValid UserName/Password";
            txtuid.Text = "";
            txtpassword.Text = "";
        }
    }

string str = "select * from userlogin where userid='" + this.txtuid.Text + "' and password='" + this.txtpassword.Text + "'";

Unvalidated user input placed directly into inline SQL? OMG | :OMG:

What's the point of having a login? Have you ever heard of SQL Injection attacks?

Session["password"] = txtpassword.Text;

NEVER, EVER store a password in memory!!

Session["username"] = txtuid.Text;
string sess = Convert.ToString(Session["username"]);
Session["password"] = txtpassword.Text;
string pass = Session["password"].ToString();

This is useless code. Put the text to Session variable then the Session variable to a local variable. WTF | :WTF:

You don't even use the local variables.

I know the language. I've read a book. - _Madmatt

hi iam using asp.net with c#

i want to display an default image from my website folder when there is no image in database , can you correct my code

<%@ WebHandler Language="C#" Class="left1" %>

using System;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Web.UI;


using System.Web;

public class left1 : IHttpHandler
{

    public void ProcessRequest(HttpContext context)
    {
        string  branchid = "";
        
        if(context.Session["branchid"]!=null)
        

            branchid= context.Session["branchid"].ToString();
        else
            throw new ArgumentException("No parameter specified");

        context.Response.ContentType = "image/jpeg";
        Stream strm = ShowImage(branchid);
        byte[] buffer = new byte[4096];
        int byteSeq = strm.Read(buffer, 0, 4096);

        while (byteSeq > 0)
        {
            context.Response.OutputStream.Write(buffer, 0, byteSeq);
            byteSeq = strm.Read(buffer, 0, 4096);
        }
            }
public Stream ShowImage(string  branchid)
    {
        SqlConnection con = new SqlConnection(" Data Source=.; Initial Catalog=SafaView;User ID=sa;Password=nsg_ss_0103;");
        string sql = "SELECT imgleft1 FROM tblImages WHERE BranchId = @BranchId";
        SqlCommand cmd = new SqlCommand(sql, con);
        cmd.CommandType = CommandType.Text;
        cmd.Parameters.AddWithValue("@BranchId", branchid);
        con.Open();
        object img = cmd.ExecuteScalar();
                try
        {
            return new MemoryStream((byte[])img);
        }
        catch
        {
            return null;
        }
        finally
        {
            con.Close();
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

in page load
=========

string id = "";
protected void Page_Load(object sender, EventArgs e)
    {
      id= Session["branchid"].ToString();
        if (IsPostBack == false)
        {
            Image1.ImageUrl = "left1.ashx?BranchId="+id;
            Image2.ImageUrl = "left1old.ashx?BranchId="+id;
                    
        
           }

i want to display a default image when there is no image in database

can you correct my code

My assumptions -
* Default image is also in the database
* BranchId is numeric
* Default image has the least possible BranchId say 0

Alter the query like so -

SELECT top 1 imgleft1 FROM tblImages WHERE BranchId in (@BranchId, @Default) order by BranchId desc

Add this line to the code

cmd.Parameters.AddWithValue("@Default", 0);

Now if the BranchId is available then that image would be displayed, else the default image would be displayed.

HTH!

Hello All,

I have a Web Application I am developing that has a GridView.
I have searched the internet to no avail looking for an answer to this.

The gridview has 11 columns. I want to hide the 11th column while in normal mode and make visible while in edit mode.

Here is my Code:

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

If e.Row.RowState = DataControlRowState.Edit Then
GridView1.Columns(11).Visible = True

ElseIf e.Row.RowState = DataControlRowState.Normal Then
GridView1.Columns(11).Visible = False

End If
End Sub

My result from the above code is The 11th column is not visible in Normal mode but when I click the Edit button an error StackOverflowExceptionwasunhandled comes up.

What am I missing Confused | :confused:

Thanks!
Tommy

if your column is 11 in grid view than u need to hide 10 one because in grid column start from 0 as base index

so you code may be

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

If e.Row.RowState = DataControlRowState.Edit Then
GridView1.Columns(10).Visible = True

ElseIf e.Row.RowState = DataControlRowState.Normal Then
GridView1.Columns(10).Visible = False

End If
End Sub

For more help : pranayamr@gmail.com

Pranay,

I did take that in to account to be sure I did change to 10 see the result.

Its was the same but just on the 10th column.

I still get the StackOverflowExceptionwasunhandled

As if its looping but I don't understand why.

Thanks,

Check this blog post - Hide GridView columns in normal mode, and show more columns in edit mode[^]

HTH!

Dinesh,

I did find this however I am not too familiar with c#

If you could help translate this toe VB.net that would be fantastic.

Thanks,
Tommy Laugh | :laugh:

I've tried to translate the coding from C# to VB.NET. I think this is the equivalent -

Protected Sub GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    If (GridView1.EditIndex < 0) Then
       Exit sub
    End If

    If ((e.Row.RowState == DataControlRowState.Normal || e.Row.RowState == DataControlRowState.Alternate) && (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.Header)) Then
       e.Row.Cells(2).Visible = False
       e.Row.Cells(3).Visible = False
    End If
End Sub

NOTE: I've not worked in VB.NET for sometime so go easy on me if it doesn't work $Shucks | :-\$

HTH!!

Hi,
grafiksinc

U just take the parameter as 10 in the columns of grid view and check the result.
Thanks.

pshimansu@gmail.com

Hello All,

Well I did try your suggestions howerver nothing worked. I think next time I will manually create the Table and writ ethe code rathe rthan use the Gridview for this tyoe of situation. With that said here is what i did.

1. Convert the column to a template
2. The columns that I want to hide - site the width to 0
3. In the ItemTemplate just remove the text so that the column title is is blank
4. On the ASP: Code set GridLines = None
5. In the edit template Put the text/check box you want to use

Doing the above steps allowed me to hide the columns in "Normal mode" and have them show in edit mode.

Thanks guys for all the help,
Tommy Laugh | :laugh:

hi all i have used an open source cms named "kentico cms".i have integrated
it locally at my system it successfully exexcuted but when i uploaded it online it is giving me following error:
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.
how can i upload it online.plz help its urgent...
the process which i have folowed is corect or wrong..
thanks ....

Your web site probably does not support anonymous logon.
If this is a company website, you should talk to the administrator to see which authentication methods are support, and how to configure them. Also read up on the documentation of your CMS.
If this is hosted website, search the documentation of your hosting provider.

hoe to print a report by default in landscape mode by using reportwizard? Confused | :confused:

Is it possible to convert a Website project type to a Web application project type without starting over from scratch with a new solution? If so, how?

SOLUTION: There is apparently no one-click tool available to perform this conversion. So I just bit the bullet and sat down and created a new solution and built it up from scratch until it was a Web application project equivalent to my original Website project. It took me about four hours with no "gotchas" to solve that I might have run into had I adopted one of the partial solutions that are out there and actually referenced in one of the answers to my question.

I performed the conversion in the following steps, basically moving from the lowest level to the highest level, compiling at each step. This minimized compile errors due to undefined objects, although I couldn't entirely eliminate them because sometimes low level objects referenced high level objects (I know: bad design; but it isn't too egregious, and I had very few of these).

1. Created a new solution of type, Web application project.
2. I ported the .Web project first, which contains my WCF Web service.
3. Then I ported my utility classes in my Silverlight project.
4. I had my pages divided into categories that were more or less in a hierarchy, and I ported the lowest categories in the hierarchy first, and worked my way up. I had very few unresolved symbols doing it this way.
5. Finally, the few compile errors I had got resolved when I ported my MainPage, the last object to port.

Along the way of course I had to add a few references, but compile errors quickly notified me when I had to do this. The new solution now works exactly like the original.

Why did I do this in the first place? I did it because the Website project type requires you to put your .Web project source code up on your Website! This has things like my connection string (with password!) right out there in plain site for anybody to see, as well as proprietary algorithms generating and validating license keys.

Oh, I know: there's a precompilation tool called aspnet_compiler.exe that will compile this code for you and after that you can obfuscate it, but in Googling about it, it looks as if you have to jump through hoops to get it to work for you. There are also better approaches than putting your source code in a folder (App_Code) off the root of your Website, like putting it into a protected subdomain, but I'm really green at all this Web development stuff and I just want to get something out there I can test as quickly as possible. I'll perform these niceties at my leisure once everything is otherwise working.

modified on Wednesday, May 12, 2010 4:58 PM

fjparisIII wrote:
Is it possible to convert a Website project type to a Web application project type without starting over from scratch with a new solution? If so, how?

Yes.
Walkthrough: Converting a Web Site Project to a Web Application Project in Visual Studio 2005 [^]
and
Upgrading VS 2005 Web Site Projects to be VS 2005 Web Application Projects[^]

If you are using VS 2008, have a look :
Converting VS 2008 Website to Web Application[^]

Hope this will help Smile | :)

Cheers !
Abhijit Jana | MVP
Web Site : abhijitjana.net | Follow Me @ twitter
Read my Latest Article :Mastering Debugging in VS 2010

Thanks for the links. I haven't had time to look at them yet, but they look exactly like what I need. BTW, I'm using VS2010.

For the record, I took a look at your first two links and they are for instructions if you're running VS2005, and one of them was for running a beta version of it! The menu system completely changed with VS2008, so maybe your third reference will be easier to follow. But even the first two links describe a brute force way of converting, basically starting over from scratch.

Well, I looked at the VS2008 link and it also is a brute force method. There apparently is no auto-conversion software to do this. I'm going to start over from scratch and completely rebuild my application from the ground up.

i want to make a CMS for a website of mine : how can i make the html formatting on it ?
and some smiles that formate the text in any web site Confused | :confused: