how to dsplay images using verticle scroll bar

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dear all
using this code , if i drag scroll bar images appear till end , but it get stuck at end
please help me out
nitin

C#

private void vScrollBar1_ValueChanged(object sender, EventArgs e)
{
    if (icount < objclsvrb.objds.Tables[0].Rows.Count)  
    {
        if (icount == 0)          
        {
            axDicomViewer1.Images.ReadFile("D:/FilmPlus_MSAccess/bin/Debug/Images/" + objclsvrb.objds.Tables[0].Rows[icount][0].ToString() + ".dcm");

            icount++;
        }
        else
        {
            axDicomViewer1.Images.ReadFile("D:/FilmPlus_MSAccess/bin/Debug/Images/" + objclsvrb.objds.Tables[0].Rows[icount][0].ToString() + ".dcm");

            icount++;
        }
    }
    else
    {
        MessageBox.Show("not found");
            
        vScrollBar1.Value = 0;
    }
}

Posted 27-Aug-12 21:55pm

Member 8893861

Updated 27-Aug-12 22:15pm

lukeer

v2

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lukeer 28-Aug-12 4:18am

Use the "Improve question" link to provide further information:

What is icount?
What do you expect to happen?
What does actually happen?
Do you get any error messages? Post them.

Member 8893861 5-Sep-12 3:15am

icount is integer for for loop
if i scroll down viewer should display image one after another
but if i scroll down scroll down and scroll up is not working sequentially ,
for example if i have 4 images a1 a2 a3 a4 ,viewer should show first a1 and lastly a4 ,and at mouse upward first a4 and lastly a1 .but it does not , while upowrd it takes a3 a2 a1 a4.
No error message

2 solutions

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Aarti Meswania · Answer 1 · 2012-08-27T22:32:00

Solution 1

you haven't decremented 'icount' for condition when scroll move reverse
for that declare a page-level variable & maintain previousValue of scrollbar.
compare it with current-value if currentvalue is less than previous then
code for icount--
Happy Coding!
:)

Posted 27-Aug-12 22:32pm

Aarti Meswania

Member 8893861 · Answer 2 · 2012-09-04T21:23:00

some changes I made
int icount=1;

C#

private void vScrollBar1_ValueChanged(object sender, EventArgs e)
       {
           
           sbvalue = vScrollBar1.Value;

           vScrollBar1.Maximum = num ;
  


           if (icount < objclsvrb.objds.Tables[0].Rows.Count)  //
           {

               if (icount == 0)          
               {
                   axDicomViewer1.Images.ReadFile("D:/FilmPlus_MSAccess/bin/Debug/Images/" + objclsvrb.objds.Tables[0].Rows[icount][0].ToString() + ".dcm");

                   icount++;
               }
               else
               {
                   axDicomViewer1.Images.ReadFile("D:/FilmPlus_MSAccess/bin/Debug/Images/" + objclsvrb.objds.Tables[0].Rows[icount][0].ToString() + ".dcm");

                   icount++;
                

               }
           }

           else
           {
               //MessageBox.Show("not found");
               icount = 0;
               vScrollBar1.Value = 1;
           }
       }