Visual Basic

Rupesh Kumar Swami3-Feb-09 23:38

3-Feb-09 23:38

can you post your query so i rectify the problem?

also how can you supply data to crystal report(run time or design time)?

Rupesh Kumar Swami
Software Developer,
Integrated Solution,
Bikaner (India)

My Company
Award: Best VB.NET article of June 2008: Create Column Charts Using OWC11

hrishiS4-Feb-09 0:01

hrishiS

4-Feb-09 0:01

thanks for your reply,

Sorry...the query is not with me right now..I will post it by tomorrow for sure...
But for the time being let me explain you, What I have done is....
create a new crystal report, with the wizard option select ms Access data and select fields and all from both the table...than in a separate from which has cr viewer and a button with a combo box....I select the id in the combo box and press the (refresh) button where I have written code(with the querry) to retrieve the records and put it to the cr viewer....that's how I did it...
Could you please tell me what can go wrong

Regards,
Himangshu

I am a learner Always

Rupesh Kumar Swami4-Feb-09 0:18

4-Feb-09 0:18

try following
make a query in MSAccess database which contains all fields of both table.Now go to following steps
1. select Data menu item
2. select Add new Data Source
3. select appropriate database and then select query

above three steps generate a dataset say dataset1

Now open your crystal report and perform following steps

1. From field explorer, right click on Database Fields and select Database Expert. This open a window
2. go Project Data-->ADO.Net dataset--->select the dataset (in this case select dataset1)
3. select this dataset and click on Ok button

Now this dataset show all fields of both tables in field explorer.Place required fields on report

Now on the form which have crystalReportViewer,combo and button, place following code to click event of button

Dim ob As New report1'( report1 is your crystal report)<br />
'here populate dataset(ds) for selected id <br />
ob.SetDataSource(ds.Tables(0))<br />
        CrystalReportViewer1.ReportSource = ob<br />
        CrystalReportViewer1.Refresh()

hope this helps

Rupesh Kumar Swami
Software Developer,
Integrated Solution,
Bikaner (India)

My Company
Award: Best VB.NET article of June 2008: Create Column Charts Using OWC11

hrishiS4-Feb-09 1:18

hrishiS

4-Feb-09 1:18

thanks,
But my data retrieval should happen dynamically....More over I am deploying the project.....In that case will it create any problem,since I want it to be dynamic..

I am a learner Always

Rupesh Kumar Swami4-Feb-09 1:35

4-Feb-09 1:35

himangshuS wrote:
But my data retrieval should happen dynamically..

yaa.For design crystal report, you must have some structure of table or query so i suggest to create data source from data menu.

i also mention in previous post that how can you supplied data at run time(see lower section of my previos post)

himangshuS wrote:
More over I am deploying the project.....In that case will it create any problem,since I want it to be dynamic..

add prerequistie "Crystal report for .Net framework 2.0" from Menu Project--->Project Properties--->Publish

Rupesh Kumar Swami
Software Developer,
Integrated Solution,
Bikaner (India)

My Company
Award: Best VB.NET article of June 2008: Create Column Charts Using OWC11

vb6 - how could i get address as i open a folder

mahalakshmi4211-Feb-09 23:30

mahalakshmi42

11-Feb-09 23:30

yes even i am having the same exact problem,
but we dont want to use the dataset concept because we are selecting the database when creating this which will not be in the same path while we are deploying the project the database may be saved in a different location

meissey3-Feb-09 22:15

meissey

3-Feb-09 22:15

I'm trying to make a project in vb6 that i need to list all the files when a open any folder?

Please help me.

Re: vb6 - how could i get address as i open a folder

Rupesh Kumar Swami4-Feb-09 0:01

How can I change the script of the font for a form if it is not changing?

4-Feb-09 0:01

try[^]

Rupesh Kumar Swami
Software Developer,
Integrated Solution,
Bikaner (India)

My Company
Award: Best VB.NET article of June 2008: Create Column Charts Using OWC11

JUNEYT3-Feb-09 21:42

JUNEYT

3-Feb-09 21:42

Hi,

I am using vb.net with VS2008. I tried to change the font of the Form. However, I was not able to change the script of the font to "central european" in the font dialog. When I re-open the font dialog, it still show the "Turkish" instead of "Central European".

If you have any idea how to change the font and the font script for a specific control in the form, Would you please let me know.

Thanks.

What a curious mind needs to discover knowledge is noting else than a pin-hole.

Re: How can I change the script of the font for a form if it is not changing?

StuBaum4-Feb-09 17:08

StuBaum

4-Feb-09 17:08

Dim family_name As String = "YourFontNameHere"
Dim font_size As Single = 10
Dim font_style As FontStyle = FontStyle.Bold Or Or FontStyle.Italic Or FontStyle.Underline Or FontStyle.Strikeout
Dim MyFont As New Font(family_name, font_size, font_style)
Me.Font = MyFont

The Specified module could not found.( Exception from HRESULT

tsanthosh3-Feb-09 21:18

tsanthosh

3-Feb-09 21:18

Hi,

I am developing desktop application in vb.net using .netframework 2.0.

In this development I am using one DLL which was developed in .netframework1.1. All of sudden i am getting the message as "The Specified module could not found.( Exception from HRESULT" when i trying to run the DLL related code.

The same code it is working in other mahines.I have same .netframeworks compares to other computers which were application running sucessfully.

Even I did repair of visiual studio 2005 but no use.

Please let me know any thoughts on this problem

Regards,
Santhosh

Bind a Combobox in VB 2008

Jaco Muller3-Feb-09 20:09

3-Feb-09 20:09

I have been programming with VB6 for many years and I am now in the process of “upgrading” to VB2008. I want to do all my work with code and not with data controls. (See my attached code so far). This is a useless sample just to get my head around a few things.
1. In the scores group on my form, I have 3 textboxes binded to my “BindingManagerBase” I can now move up and done both tables. I want to add “Delete”, “Add” and “Edit” functionality for the Scores table. Instead of manually looking up the StudentID, I want to replace the textbox with a Combobox. So I want to see the student’s “FirstName” from the students table in the combo box, and then link the StudentID from the Student Table to the StudentID in the TestScores table. (I have done it many times with VB6, but how do I do it in VB2008.

This is my tables and my code.

Table Name: Students
StudentID FirstName LastName
1 Amy Anderson
2 Bob Baker
3 Cindy Carter
4 Donald Dorph

Table Name: TestScores
StudentID TestNumber Score
1 1 98
1 2 94
2 1 74
3 2 65

' Data adapter for the Students table.
Dim m_daStudents As New OleDbDataAdapter( _
"SELECT Students.StudentID, Students.FirstName, Students.LastName " & _
"FROM Students", _
"PROVIDER=MSDataShape;" & _
"Data PROVIDER=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source='Student Scores.mdb';" & _
"Persist Security " & _
"Info=False")
' Data adapter for the TestScores table.
Dim m_daTestScores As New OleDbDataAdapter( _
"SELECT TestScores.StudentID, TestScores.TestNumber, TestScores.Score " & _
"FROM TestScores", _
"PROVIDER=MSDataShape;" & _
"Data PROVIDER=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source='Student Scores.mdb';" & _
"Persist Security " & _
"Info=False")
' The DataSet.
Dim m_DataSet As New DataSet("Student Scores")
' Declare a binding manager field
Public bm_Students As BindingManagerBase
Public bm_TestScores As BindingManagerBase

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' Load the Students table.
m_daStudents.Fill(m_DataSet, "Students")
' Load the TestScores table.
m_daTestScores.Fill(m_DataSet, "TestScores")
' Get the DataTable objects.
Dim dt_students As DataTable = m_DataSet.Tables("Students")
Dim dt_testscores As DataTable = m_DataSet.Tables("TestScores")

' Get DataColumn objects we will need.
Dim col_students_studentid As DataColumn = _
dt_students.Columns("StudentId")
Dim col_testscores_studentid As DataColumn = _
dt_testscores.Columns("StudentId")
Dim col_testscores_testnumber As DataColumn = _
dt_testscores.Columns("TestNumber")

' Define the primary keys.
Dim students_keys() As DataColumn = _
{col_students_studentid}
dt_students.PrimaryKey = students_keys

Dim testscores_keys() As DataColumn = _
{col_testscores_studentid, col_testscores_testnumber}
dt_testscores.PrimaryKey = testscores_keys

' Make a foreign key constraint.
Dim fk_studentid As New ForeignKeyConstraint( _
col_students_studentid, col_testscores_studentid)
dt_testscores.Constraints.Add(fk_studentid)

' Bind to textboxes for Students table
txtStudentID.DataBindings.Add("text", m_DataSet, "Students.StudentID")
txtFirstName.DataBindings.Add("text", m_DataSet, "Students.FirstName")
txtLastName.DataBindings.Add("text", m_DataSet, "Students.LastName")

' Bind to textboxes for TestScore table
txtTestScores1.DataBindings.Add("text", m_DataSet, "TestScores.StudentID")
txtTestScores2.DataBindings.Add("text", m_DataSet, "TestScores.TestNumber")
txtTestScores3.DataBindings.Add("text", m_DataSet, "TestScores.Score")

' Bind to datagrid for TestScore table
DataGridView1.DataSource = m_DataSet
DataGridView1.DataMember = "TestScores"

bm_Students = BindingContext(m_DataSet, "Students")
bm_Students.Position = 0
bm_TestScores = BindingContext(m_DataSet, "TestScores")
bm_TestScores.Position = 0

End Sub

Jay Royall4-Feb-09 5:56

4-Feb-09 5:56

Have you tried binding the combobox to the datatable?
i.e.

ComboBox.DisplayMember = FieldToDisplay
ComboBox.ValueMember = ValueField
ComboBox.DataSource = DataTable

Jaco Muller4-Feb-09 11:20

4-Feb-09 11:20

Thank you for your time. Yes, I have tried but it did not work. The syntax might be wrong. From VB6 I know that there are 5 properties to set:
1. You need to specify the table for the displayed value. (Table: Students)
2. You need to specify the field of the displayed value. (Field: FirstName)
3. You need to specify the field to transfer. (Field: StudentID)
4. You need to specify the table to be updated. (Table: Testscores)
5. You need to specify the field to be updated with the ComboBox. (Field: StudentID)
So maybe my downfall is thinking in VB6.
Back to your recommendation:
ComboBox.DisplayMember = FieldToDisplay What will this be in my case, based on the code
ComboBox.ValueMember = ValueField What will this be in my case, based on the code
ComboBox.DataSource = DataTable What will this be in my case, based on the code
Thank again for your time

Jay Royall4-Feb-09 22:37

4-Feb-09 22:37

Being a beginner myself I'm not that familiar with DataTables, but I think it should be something like:

ComboBox.DisplayMember = "Firstname"
ComboBox.ValueMember = "StudentId"
ComboBox.DataSource = dt_students

Hope this helps.

Jaco Muller4-Feb-09 23:04

4-Feb-09 23:04

Thanks again for your time, I will try it tomorrow, I am not at my computer at the moment. Do you have an idea how to search for a record? Say for example I have a textbox and I enter a name in the textbox. I then want to go directly to record without looping through the table?

Jay Royall4-Feb-09 23:33

4-Feb-09 23:33

Again, being a beginner I may be wrong here but I think you can use the Select function to filter the rows in your datatable. Something like:

dt_Students.Select("FirstName = John")

Jaco Muller5-Feb-09 11:47

5-Feb-09 11:47

Sorry, back to your last advice. This fills the combobox, but it is not linked to the Scores table. So if I hit the next button, I can step through the table, but the combobox will not reflect the correct student, it will stay with the first name.

Jay Royall5-Feb-09 23:57

5-Feb-09 23:57

Well if I understand you correctly, you need to handle the click event of the next button and then select the correct item in the ComboBox using: ComboBox.selectedValue = StudentID

Jaco Muller6-Feb-09 0:09