Loading image dynamically in crystal report - Visual Basic Discussion Boards

Have you done a Try/Catch as Exception?

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"Possessions make you poor, wealth is measurable only in experience."
Sun Tzu 621BC

There is no event that is raised by the control when an invalid date is attempted. Your code will never know that the user made such an attempt.

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Thanks for the information. Smile | :)

I saw his code and thought it looked odd but couldn't see it!

My simple scribblings should be usable for him though, bending it to his needs of course, but I see the point about no event. But, if he is getting an Error Beep, is there no way to interupt at that point?

(Forgive my dimness, I am still learning Smile | :)

)

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"Possessions make you poor, wealth is measurable only in experience."
Sun Tzu 621BC

How is your code going to know that it even happened?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

I got you!

It only evaluates what has been picked AFTER it is selected, not whilst!

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"Possessions make you poor, wealth is measurable only in experience."
Sun Tzu 621BC

Yep!

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

I have a field of Image path on database and I need to display the image of student in crystal report. I am using VS2005 with crystal report version 9. I have added the unbound column named "Image" of type system.byte in Data Set and at the load event, I have write the following code.

Dim da As New DataSet1TableAdapters.AdmissionFormTableAdapter
Dim dt As New DataSet1.AdmissionFormDataTable
da.FillByStudentID(dt, _studentID)
Dim dtCopy As New DataTable

'''''''''''''''''''''''''''''''''''''''''''''''''''''''
'Code Start to Set Image
'''''''''''''''''''''''''''''''''''''''''''''''''''''''
Dim blankFile As String = "C:\Program Files\blank.JPG"

If dt.Rows(0).Item("ImagePath").ToString <> "" Then
Dim s As String = dt.Rows(0).Item("ImagePath").ToString
If FileIO.FileSystem.FileExists(s) Then

Dim fs As FileStream = New FileStream(s, FileMode.Open, FileAccess.Read)
Dim image(fs.Length) As Byte

fs.Read(image, 0, Convert.ToInt32(fs.Length))
dt.Rows(0).Item("Image") = image
fs.Close()
Else
Dim fs As FileStream = New FileStream(blankFile, FileMode.Open, FileAccess.Read)
Dim image(fs.Length) As Byte

fs.Read(image, 0, Convert.ToInt32(fs.Length))
dt.Rows(0).Item("Image") = image
fs.Close()
End If
Else
Dim fs As FileStream = New FileStream(blankFile, FileMode.Open, FileAccess.Read)
Dim image(fs.Length) As Byte

fs.Read(image, 0, Convert.ToInt32(fs.Length))
dt.Rows(0).Item("Image") = image
fs.Close()
End If
'''''''''''''''''''''''''''''''''''''''''''''''''''''''
'Code End to Set Image
'''''''''''''''''''''''''''''''''''''''''''''''''''''''

dtCopy = dt.Copy
Me.rptAdmissionForm1.SetDataSource(dtCopy)
Me.rptAdmissionForm1.SetParameterValue("ID", _studentID)

When I run the code, error comes that "unable to cast type of system.byte to system.IConvertible",
although the datatype of column "Image" is system.byte, and when I debug the code, it shows the datatype of dt.Rows(0).Item("Image") = System.DBNull, Please help me out..!

Your code is very confusing as you have variables named the same but at different levels. It would be easier to find the problem if you would have just one main variable for the filestream, one for the image byte array. Use if statements to determine which file you want to load, then when you've done all the checks you can have just one spot that actually uses the filestream reader code.

You might also want to try using this instead of your filestreamreader code to convert the file into a byte array:

If FileIO.FileSystem.FileExists(s) Then
System.IO.File.ReadAllBytes(s)
End If

Also, is there a reason you make a copy of the datatable to send in, instead of just sending dt?

Hope this helps.

I'm trying to come up with a procedure to send sms alerts when certain things happen in my VB6 application(e.g when a scheduled job crashes).
Not exactly sure where to start, i've read a few articles on the net but they confusing me. I just want 2 know first in plain english what are the important things to consider, pc configurations, etc, before getting deep on the VB6 commands to achieve this(if there is).

I do not want to connect each and every sms recipient to my PC. Is this possible?

Thanks

Instead of fooling around with gateways and such, I think you could send an email to the phonenumber@provider and it will get sent to the phone, albeit this was an old tactic I used (mine was 514*******@pcs.rogers.com), or configure your email account on your phone and just send an email to that address assuming your phone can support email accounts.

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Dear all,

I have a crystal report which has a lot of detaildections. In 3 sections there are 3 subreports. (1 subreport per section).

If there is no data available I would like to hide the section. This works perfectly for the no subreport sections.

It also works perfectly if there is no data in the whole subreport.

However in some cases the subreport also has section and if there is not data for that one particular section I would like to hide it. I can do this, but then it hides that section for all records in that subreport. I only want it for that specific section.

I hope that makes sense. If you need more info please ask.

My code is as follows:

Do While Not rs.EOF
            bFound = True
            With dsCVForClient
                .dtPersonalDetails.Rows.Add(rs.Fields(0).Value, rs.Fields(1).Value, rs.Fields(2).Value, rs.Fields(3).Value, rs.Fields(4).Value, rs.Fields(5).Value, rs.Fields(6).Value, rs.Fields(7).Value, rs.Fields(8).Value, rs.Fields(9).Value, rs.Fields(10).Value, rs.Fields(11).Value, rs.Fields(12).Value, rs.Fields(13).Value, rs.Fields(14).Value, rs.Fields(15).Value, rs.Fields(16).Value, rs.Fields(17).Value, rs.Fields(18).Value, rs.Fields(19).Value, rs.Fields(20).Value, rs.Fields(21).Value, rs.Fields(22).Value, rs.Fields(23).Value, rs.Fields(24).Value, sClient, sVacancy, sConsultant)
                rsInHouse = gCnn.Execute("select regno, tertiaryinstitute, course, duration, completed, subjects from tertiaryeducation where regno = '" & sRegNo & "'")
                Do While Not rsInHouse.EOF
                    For i = 0 To 5
                        If rsInHouse.Fields(i).Value = "" Then sTertiaryEducation(i) = "Not specified" Else sTertiaryEducation(i) = rsInHouse.Fields(i).Value
                    Next
                    .dtInHouseOtherCourses.Rows.Add(sTertiaryEducation(0), sTertiaryEducation(1), sTertiaryEducation(2), sTertiaryEducation(3), sTertiaryEducation(4), sTertiaryEducation(5))
                    rsInHouse.MoveNext()
                Loop
                rsJobHistory = gCnn.Execute("select regno, company, jobtitle, datestarted, dateleft, tasks, reasonleft, duties from jobhistory where regno = '" & sRegNo & "' order by datestarted DESC")
                Do While Not rsJobHistory.EOF
                    For i = 0 To 6
                        If rsJobHistory.Fields(i).Value = "" Then sJobHistory(i) = "Not specified" Else sJobHistory(i) = rsJobHistory.Fields(i).Value
                    Next
                    If rsJobHistory.Fields(7).Value <> "" Then
                        If sJobHistory(4) = "0000-00-00" Then .dtJobHistory.Rows.Add(sJobHistory(0), sJobHistory(1), sJobHistory(2), sJobHistory(3) & " to current" & vbCrLf & vbCrLf & rsJobHistory.Fields(7).Value, sJobHistory(5), sJobHistory(6)) Else .dtJobHistory.Rows.Add(sJobHistory(0), sJobHistory(1), sJobHistory(2), sJobHistory(3) & " to " & sJobHistory(4) & vbCrLf & vbCrLf & rsJobHistory.Fields(7).Value, sJobHistory(5), sJobHistory(6))
                    Else
                        If sJobHistory(4) = "0000-00-00" Then .dtJobHistory.Rows.Add(sJobHistory(0), sJobHistory(1), sJobHistory(2), sJobHistory(3) & " to current", sJobHistory(5), sJobHistory(6)) Else .dtJobHistory.Rows.Add(sJobHistory(0), sJobHistory(1), sJobHistory(2), sJobHistory(3) & " to " & sJobHistory(4), sJobHistory(5), sJobHistory(6))
                    End If
                    rsJobHistory.MoveNext()
                Loop
                rsReferences = gCnn.Execute("select regno, nameofreference, designation, refcompany, reftelephone, refcellphone, reportedto, verifydates, closelysupervised, supervisestaff, nostaff, howwell, relsubordinates, relcolleagues, relsuperiors, relcustomers, meetobjectives, handlepressure, accuracy, reliability, honest, honestreporting, comparitiveresults, refstrengths, refweaknesses, attendance, reason, specificskills, rehire, refspecialachievements, otherinformation, comments from refercheck where regno = '" & sRegNo & "'")
                Do While Not rsReferences.EOF
                    For i = 0 To 31
                        If rsReferences.Fields(i).Value = "" Then sReferences(i) = "Not specified" Else sReferences(i) = rsReferences.Fields(i).Value
                    Next
                    If sReferences(7) = "1" Then sReferences(7) = "Yes" Else sReferences(7) = "No"
                    If sReferences(9) = "1" Then sReferences(9) = "Yes" Else sReferences(9) = "No"
                    .dtReferences.Rows.Add(sReferences(0), sReferences(1), sReferences(2), sReferences(3), sReferences(4), sReferences(5), sReferences(6), sReferences(7), sReferences(8), sReferences(9), sReferences(10), sReferences(11), sReferences(12), sReferences(13), sReferences(14), sReferences(15), sReferences(16), sReferences(17), sReferences(18), sReferences(19), sReferences(20), sReferences(21), sReferences(22), sReferences(23), sReferences(24), sReferences(25), sReferences(26), sReferences(27), sReferences(28), sReferences(29), sReferences(30), sReferences(31))
                    rsReferences.MoveNext()
                Loop
            End With
            rs.MoveNext()
        Loop

Many thanks
Andrew

What logic are you using to hide/unhide the section ?

I just don't see it. Confused | :confused:

You have to remember that when you create a "Supression" formula in Crystal, you have to make sure that you have logic to both hide (supress=true) and unhide (supress=false).

Regards,
David

Hi David,

Thank you for your reply.

Ok the reason you dont see it is becuase maybe my brain is on overload and I posted the section it populates the dataset. The reason being is I thought maybe it could be done there somewhere. But on second thought it cant be done there.

A short sample:

If dsCVForClient.dtPersonalDetails(0).ComputerPackages = "" Then rpt.DetailSection49.SectionFormat.EnableSuppress = True

If dsCVForClient.dtInHouseOtherCourses.Count = 0 Then rpt.DetailSection50.SectionFormat.EnableSuppress = True

To get to the subreport, i used:

rpt.Subreports(0).ReportDefinition.Sections(5).SectionFormat.EnableSuppress = True

But it led to the seciont being suppressed for all the records in the subreport.

The personaldetails will only ever have 1 record for this report, but the subreports could have anything from 0 to 100 records.

If appears that your logic sets the suppression to "TRUE", but never sets it to "FALSE".

I think the answer is to put an Else clause and set the suppression to FALSE.

give it a try. Cool | :cool:

Thank you, that was a great suggestion.

The bad news is though, it didnt work. What happens then is it enabled the section for all the records again. So if the last record did have a vaule in the field it unhid the section for all the records.

For i = 0 To dsCVForClient.dtInHouseOtherCourses.Count - 1
    If dsCVForClient.dtInHouseOtherCourses(i).Subjects = "" Then rpt.Subreports(0).ReportDefinition.Sections(5).SectionFormat.EnableSuppress = True Else rpt.Subreports(0).ReportDefinition.Sections(5).SectionFormat.EnableSuppress = False
Next

I seem to think the secret lies in the rpt.Subreports(0).ReportDefinition is there some way to talk to a record in that subreport? Confused | :confused:

You can write a fomula to supress the "detail" section of the subreport, effectively suppressing the output for each record as you see fit.

Thats what I am looking for.

The question is how do i get to each record?

You havent got some code? (just the object with the periods...) Big Grin | :-D

Here is a basic idea of how I imagine you are using Crystal Reports.

1) Using Visual Studio (VS) you create a Crystal Report design (.rpt file)
2) Using VS you have your application display the report using the CrystalReportViewer.

My example code is actually from an ASP.Net application, but the idea is the same.

Dim rpt As New ReportDocument

rpt.Load("\myReport1")
 
'For example purposes, imagine that the myDataSet is populated already

rpt.SetDataSource(myDataSet)
 
CrystalReportViewer1.ReportSource = rpt

Based on this design, you would put the hide/unhide logic in the Crystal ".RPT" file. You don't have to do anything programatically with VB.

Is this how you are working with Crystal ? Unsure | :~

From your examples, I don't think so.

My impression is that the VB.net code should:
1) Create the dataset
2) Invoke the Crystal Report via the CrystalReportViewer and let Crystal do the formatting.

Are we on the same page? Confused | :confused:

Hi David,

We are on the same page.

That is basically how mine works too...

Dim rpt As New rptCVForClient()

'Code to hide sections

Try
    rpt.SetDataSource(dsCVForClient)
    crvReport.ReportSource = rpt
Catch Excep As Exception
    MessageBox.Show(Excep.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try

The problem is I have unbound text boxes in the sections that make the suppressing via property setting not work. I should probably change that, but I have never made a bound label in crystal reports... as er.. weird as that may sound.

Wow. I think you may have made your life harder by not using bound fields. I would start with working on getting all of your fields on the report to be bound to fields in the dataset. Or you can create formula fields that are based on fields in the dataset.

The report shouldn't be that complicated.

Hi David, thank you!

The report is working as it should. Thanks for your perserverance and help!

Thumbs Up | :thumbsup:

Good to hear that everything is working now.
I'm sure it is a big relief. On to the next challenge. Smile | :)

hi all,

i made a user control in VS2008 which works fine in every aspect. But when i import it to VS2008 toolBox and drag drop it to any form... nothing happens... its not added to the form designer... any clue??

thanx in advance for any help!!

binjafar wrote:
any clue

Yes.
Something has gone wrong.

Unfortunately without more information, it is almost impossible to guess what that is.

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”