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I have a nested datalist where the parent datalist has child datalist within each itemtemplate.the entrie page is posted to server and no ajax functionality is used.
the datasource for parent grid is set in vb.net code while for the child grid is set in the html code itself.
On the first load of the page the grid is loaded perfectly fine.
However on click of any button when i do the page-reload and call databind for the parent grid the child grid is not reloaded with data and shows no data at all.I have call databind for child datalist inside the itemdatabound of parent.
I have tried many approaches but for can not figure out why it is not working ,technical all looks fine to me.Cant post the code here..But i can give more explanation if required.
thanks in advance.
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Hi Guys
As I'm new to this forum, I got my first big project to do.
I'm kind of a beginner in vb.NET but I'm willing to learn what it needs to complete my task on a sophisticated level
So, in general, I got several PDF Files which are entirely based on the same template. So every single PDF got almost the same Structure.
The content is mostly on a two column table base.
(for the beginning, later on i'd also like to extract things out of the Headline, etc.)
On the Left Column is the topic which is always the same, on the righthand column is the Content that I want/need to extract. This content varies.
What I need is, that I can "import" this PDF file to my vb.NET Program, this scans, or extracts the content for example from Coloumn B, Row 1 to Textbox 1, from Column B, Row 2 to Textbox 2 and so on.
Is that possible?
and at first id like to get a foot into it, and extract a whole PDF to my Textbox.
How do I do that? Anyone got Tutorials or something like that?
Please keep in mind, that i'm quiet a beginner in vb.NET
Thank you for your time ![Smile | :)](https://codeproject.global.ssl.fastly.net/script/Forums/Images/smiley_smile.gif)
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Good point, thank you.
Is it only available for C#?
Because right now, i'm capable of Visual Basic, and not C# ![Frown | :(](https://codeproject.global.ssl.fastly.net/script/Forums/Images/smiley_frown.gif)
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No it works with either, both VB.NET and C# produce the same (more or less) executable code. Unfortunately if you don't know C# you may find using this library a bit of a challenge, but I think your project is quite a major challenge for someone new to .NET. You probably need to do quite a bit more research to find some more tutorials that are written specifically for VB.NET.
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Could you be so king and take a closer look to This?[^]
it looks very satisfying, but I dont know, how to import my PDF? Trough a OpenFileDialog? And if yes, how do i manage it, to get it into these functions?
Thank you anyway! ![Smile | :)](https://codeproject.global.ssl.fastly.net/script/Forums/Images/smiley_smile.gif)
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The source you linked could probably work, looks a bit like a quick & dirty solution though.
You would have to create an instance of the pdf2txt class with the filename of the pdf-file as parameter (which you could get through an OpenFileDialog) and then call GetText() on it.
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You should read the documentation for OpenFileDialog ; all it offers is a method for getting the filename from the user. Reading files is a different issue and requires the use of one of the stream classes. I am not sure what that code is supposed to be doing, I suggest you try it and see if it helps you.
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I have Records which are supposed to be assigned Position/Be Ranked e.g
RegNo Marks Position
1 300
3 301
4 403
5 345
My Problem is How to rank/give position according to marks attained such that the results will be displayed as:
RegNo Marks Position
1 300 4
3 301 3
4 403 1
5 345 2
using VB.NET MYSQL
...KINDLY ASSIST
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Please do not repost the same question in multiple forums, and try to use the correct forum in the first place. This is a database question, which I already answered in that forum, nothing to do with the .NET framework.
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I have a datagridview with the columns Totalscore,MARK1,MARK2,MARK3,..MARK10. my problem is how i can check if less than 7 cells in a row are filled with values then update TotalScore as -1 otherwise if 7 or more have values then find the total of the cells.
i had tried with this but could not succeed
Try
For i As Integer = 9 To Me.DataGridView1.Rows.Count - 1
With Me.DataGridView1.Rows(i)
If IsDBNull(.Cells(9).Value()) OrElse .Cells(9).Value() Is Nothing OrElse .Cells(9).Value().ToString().Trim() = "" Then
ttScore = "-1"
avg = "-1"
points = "-1"
pos = "-1"
.Cells(2).Value() = ttScore
.Cells(3).Value() = avg
.Cells(4).Value() = pos
.Cells(5).Value() = points
Else
ttScore = "1"
avg = "1"
points = "1"
pos = "1"
.Cells(2).Value() = ttScore
.Cells(3).Value() = avg
.Cells(4).Value() = pos
.Cells(5).Value() = points
End If
End With
Next
Catch ex As Exception
MsgBox(ex.Message)
End Try
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KipkoechE wrote:
For i As Integer = 9 To Me.DataGridView1.Rows.Count - 1
With Me.DataGridView1.Rows(i)
That means "for row 9 to amount-1". Is it the intention to ignore the first nine rows?
Bastard Programmer from Hell
If you can't read my code, try converting it here[^]
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yea...it is suppose to ignore the first nine rows
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Are you sure there are more thsn 9 rows in the grid? And why are you storing strings for numbers? And why all those redundant interim variables, why not just:
.Cells(2).Value() = -1
And most importantly, what do you mean by "i had tried with this but could not succeed"; what do you expect to happen, and what does actually happen?
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Am very sure...i have 20 rows
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i changed it to :
Try
For i As Integer = 0 To Me.DataGridView1.Rows.Count - 1
With Me.DataGridView1.Rows(i)
If IsDBNull(.Cells(9).Value()) OrElse .Cells(9).Value() Is Nothing OrElse .Cells(9).Value().ToString().Trim() = "" Then
.Cells(6).Value() = -1
.Cells(7).Value() = -1
.Cells(8).Value() = -1
.Cells(9).Value() = -1
Else
.Cells(6).Value() = 1
.Cells(7).Value() = 1
.Cells(8).Value() = 1
.Cells(9).Value() = 1
End If
End With
Next
Catch ex As Exception
MsgBox(ex.Message)
End Try
and it worked very well
My problem now is adding the rows data...
Thanks for the guidance
-- modified 11-Feb-15 4:21am.
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I have three tables in the school database: students,exams,subjects. my Problem is how i can take the take the subjects records and admission no from students and use them to create a table call marks at the click of a button. Note: the no of records are unpredictable.
Student Table contains fields: admno,name,form
exam contains fields: ExamName
subjects: SubjectName,SubjectID
The Marks table final result should be
admno,name,form,ExamName,subject1,subject2,...subjectn(Based on the no of subjects in the subject table)
. Am using vb.net with mysql. Kindly assist. it has given me headache for weeks
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This question belongs in the Database forum, it is not a .NET issue.
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i have copied it to the database...kindly assist me to answer from there
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<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="frmSMS.aspx.cs" Inherits="frmSMS" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:updatepanel id="UpdatePanel1" runat="server" updatemode="Conditional"
ChildrenAsTriggers="False">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
<contenttemplate>
<center>
<div>
<asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</div>
</center>
</contenttemplate>
</asp:updatepanel>
<asp:updateprogress id="UpdateProgress1" runat="server" associatedupdatepanelid="UpdatePanel1" displayafter="2000" dynamiclayout="true">
<progresstemplate>
<center>
<asp:Image ID="Image1" src="~/images/loading.gif" runat="server" />
</center>
</progresstemplate>
</asp:updateprogress>
</asp:Content>
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OK, so what? Did you read the error message? It's telling you exactly what you have to do to fix the problem.
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The control with ID 'UpdatePanel1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidOperationException: The control with ID 'UpdatePanel1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[InvalidOperationException: The control with ID 'UpdatePanel1' requires a ScriptManager on the page. The ScriptManager must appear before any controls that need it.]
System.Web.UI.UpdatePanel.get_ScriptManager() +474740
System.Web.UI.UpdatePanel.RegisterPanel() +2515953
System.Web.UI.UpdatePanel.OnInit(EventArgs e) +19
System.Web.UI.Control.InitRecursive(Control namingContainer) +140
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Control.InitRecursive(Control namingContainer) +311
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +480
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1
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Ok. That still doesn't change my answer. You very simply need to drop a ScriptManager on the page, just like the error message says.
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Thank you dave kreskowiak.
I use toolkit script manager. plz help
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Are you kidding me? Help with what? All you had to do was drag a ScriptManager from the ToolBox to your form! What's so hard about that?
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