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Yeah, it is a rather heavy control. But I cut out about 65% of the code in the application I was using it for, so that is a big win. (Yes, 65% of the code was for handling list view related operations, and I was only about 30% done with the program!)
What do you get when you cross a joke with a rhetorical question?
The metaphorical solid rear-end expulsions have impacted the metaphorical motorized bladed rotating air movement mechanism.
Do questions with multiple question marks annoy you???
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Hey, I am new to GUI programming
While trying to design a dialog box that gets user input and saves it to a file on clicking the save button, I ran into this error.
[code]
using System.Windows.Forms;
using System.Drawing;
using System.IO;
using System;
public class Mfury : Form
{
public Mfury()
{
Size = new Size(800,500);
Text = "Enter details of the book";
Label xo = new Label();
xo.Text = "Name : ";
xo.Location = new Point(10,10);
xo.Width = 50;
xo.Parent = this;
TextBox to = new TextBox();
to.Parent = this;
to.Location = new Point(90,10);
to.Width = 600;
to.Multiline = false;
string Var1 = to.Text;
Label x1 = new Label();
x1.Text = " ISBN : ";
x1.Width = 50;
x1.Location = new Point(10,50);
x1.Parent = this;
TextBox t1 = new TextBox();
t1.Parent = this;
t1.Location = new Point(91,43);
t1.Width = 600;
t1.Multiline = false;
string Var2 = t1.Text;
Label x2 = new Label();
x2.Text = "Key Words :";
x2.Width = 80;
x2.Parent = this;
x2.Location = new Point(10,90);
TextBox t2 = new TextBox();
t2.Parent = this;
t2.Location = new Point(91,83);
t2.Width = 600;
t2.Multiline = false;
string Var3 = t2.Text;
Button bo = new Button();
Button b1 = new Button();
bo.Parent = this;
b1.Parent = this;
bo.Location = new Point(520,350);
bo.Text = "Save";
bo.Height = 100;
bo.Width = 100;
Controls.Add(bo);
b1.Location = new Point(630,350);
b1.Text = "Close";
b1.Size = new Size(100,100);
Controls.Add(b1);
bo.Click += new EventHandler(onsave);
b1.Click += new EventHandler(onExit);
}
void onsave(Object Sender,EventArgs e)
{
FileStream fs = new FileStream("test.txt",FileMode.OpenOrCreate,FileAccess.Write);
StreamWriter sw = new StreamWriter(fs);
sw.WriteLine(to.Text);
sw.WriteLine(t1.Text);
sw.WriteLine(t2.Text);
sw.Close();
}
void onExit(Object Sender,EventArgs e)
{
Close();
}
public static void Main()
{
Application.Run(new Mfury());
}
}
[\code]
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What error, and where does it occur? Also, please use <pre> tags around your code, not [code]. You can do it automatically by selecting all the lines in your post, and using the code button at the top of the edit box.
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An easy idea would be, "you need to create a variable with that name, or you need to see if variable name has any typos".
Secondly, as already mentioned. [code][\code] is supported on some websites, such as Quora. On CodeProject, you have to embed your code inside <pre> tags, or you can try out using the new Markdown[^] on CodeProject.
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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Hello;
I am seeking a joystick-alike windows forms control that is free to implement some directional mooving in my windows form..with no success.
please can any one help me find this.
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Hi, I have a gridview where the first column is a checkbox. When I open the grid, the value of the first checkbox is always false, no matter how it is initialized. When I select another cell, the correct state appears. How could I have the correct value be shown?
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Without seeing some of your code it is impossible to guess why this may be happening. How do you initialise the checkbox?
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ok, here is my intitialization:
foreach (Linie lrow in ud.Linien)
{
LLinGrid.Rows.Add();
DataGridViewRow gr = LLinGrid.Rows[LLinGrid.NewRowIndex - 1];
gr.Cells["global"].Value = Convert.ToString(lrow.Global);
gr.Cells["ust"].Value = Convert.ToString(lrow.Ust);
gr.Cells["kennung"].Value = Convert.ToString(lrow.Kennung);
if ((lrow.Kennung & 0x80) != 0)
gr.Cells["isuz"].Value = true;
if ((lrow.Kennung & 0x40) != 0)
gr.Cells["aktiv"].Value = true;
gr.Cells["dir"].Value = Convert.ToString(lrow.Dir);
gr.Cells["xmit"].Value = true;
}
if I move the "xmit" column from position 1 to >2, it works. I tried:
LLinGrid.ClearSelection();
LLinGrid.Rows[0].Cells[1].Selected = true;
LLinGrid.Invalidate();
LLinGrid.InvalidateCell(LLinGrid.Rows[0].Cells[0]);
LLinGrid.Show();
LLinGrid.UpdateCellValue(0, 0);
All of those didn't show the desired result. The value for the checkbox in the first column stays unchecked until I move to the next cell.
this happens only in the first row; follwing rows are correct.
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Got it. I had
this.Show();
positioned before the initialization block above. This raises the BeginEdit event for the first cell which seems to prevent the altering via program.
There are 2 ways to solve this:
move
this.Show();
or insert
LLinGrid.EndEdit();
behind initialization,
Thanx for your interest.
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Windows Forms do not really lend themselves too well to such design. Try WPF which offers much more flexibility of layout.
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You GDI things on the Device Contexts provided by the forms. I personally prefer this approach to WPF.
Geek code v 3.12
GCS d--- s-/++ a- C++++ U+++ P- L- E-- W++ N++ o+ K- w+++ O? M-- V? PS+ PE- Y+ PGP t++ 5? X R++ tv-- b+ DI+++ D++ G e++>+++ h--- r++>+++ y+++*
Weapons extension: ma- k++ F+2 X
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Hello all,
Hopefully I am posting in the right place otherwise please correct me.
I want to display a scrollable list of tiles with images to display categories of items (all click selectable) and have another area displaying products as images all click selectable. I want to do this in C# .net 4.0 using VS 2010.
I would like advice on which controls to use from the basics (non commercial please). Could someone please point me in the right direction.
Like the layout shown here
http://unicenta-opos.en.softonic.com/[^]
I have looked at a few things ??
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minnie mouse wrote: I want to do this in C#
Then you would probably get a better response in the C# forum. However, the control you need will most likely be a ListView[^].
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Hey guys, we are trying to design an autonomous system to match the criteria between college students qualifications and the companies offering intern positions requirements, I have checked and the closest thing I got were a few CRM's. If any of you have any idea about any open source software that we can use to design such a system please share your knowledge on the matter 
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this i my first post, so i hope i am explaining it correctly, have a datagridview with a textboxcolumn. it is bind to a dataset
my problem is when i update a record wiht more that 350 characters it give me a nullrefference error. the database is updated when i check the physical record but the application crash
here is the function
Private Sub m_maintenanceProcessor_WebsiteUpdated(ByVal sender As Object, ByVal e As Processors.EventArgs) Handles m_maintenanceProcessor.WebsiteUpdated
Dim tempTable As MaintenanceDataSet.WebsitePageDownloadDataTable
Try
If e.Data.Contains("ModifiedRows") = False Then Exit Sub
tempTable = CType(e.Data("ModifiedRows"), MaintenanceDataSet.WebsitePageDownloadDataTable)
If tempTable.Rows.Count > 0 Then
RemoveHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
Processor.Data.WebsitePageDownload.LoadingTable = True
Processor.Data.WebsitePageDownload.Merge(tempTable, False)
Processor.Data.WebsitePageDownload.LoadingTable = False
Processor.Data.WebsitePageDownload.RejectChanges()
AddHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
Processor.Data.WebsitePageDownload.Merge(tempTable)
'For Each row As DataRow In tempTable.Rows
' If row.RowError IsNot Nothing AndAlso row.RowError.Length > 0 Then
' MsgBox(row.RowError)
' End If
' ' MsgBox(row("URL").ToString)
'Next
'MsgBox(Processor.Data.WebsitePageDownload.Columns("defaultstatusid").MaxLength)
Processor.Data.WebsitePageDownload.AcceptChanges()
End If
Catch ex As Exception
MsgBox(ex.Message.ToString)
End Try
tempTable = Nothing
Me.StatusMessage = String.Empty
End Sub
error gets thrown on acceptchanges
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Where does the error occur?
Please edit your question and put <pre> tags around your code so it looks like:
Processor.Data.WebsitePageDownload.RejectChanges()
AddHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
and indicate exactly which line the error occurs on.
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Private Sub m_maintenanceProcessor_WebsiteUpdated(ByVal sender As Object, ByVal e As Processors.EventArgs) Handles m_maintenanceProcessor.WebsiteUpdated
Dim tempTable As MaintenanceDataSet.WebsitePageDownloadDataTable
Try
If e.Data.Contains("ModifiedRows") = False Then Exit Sub
tempTable = CType(e.Data("ModifiedRows"), MaintenanceDataSet.WebsitePageDownloadDataTable)
If tempTable.Rows.Count > 0 Then
RemoveHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
Processor.Data.WebsitePageDownload.LoadingTable = True
Processor.Data.WebsitePageDownload.Merge(tempTable, False)
Processor.Data.WebsitePageDownload.LoadingTable = False
Processor.Data.WebsitePageDownload.RejectChanges()
AddHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
Processor.Data.WebsitePageDownload.Merge(tempTable)
Processor.Data.WebsitePageDownload.AcceptChanges()
End If
Catch ex As Exception
MsgBox(ex.Message.ToString)
End Try
tempTable = Nothing
Me.StatusMessage = String.Empty
End Sub
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You will need to use your debugger to find out which reference in that line is invalid.
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what i know for a fact is the is a field that is set for 2000 characters but once this field goes over 350 the error gets triggered, other than that the application is fine
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Rhyde Marsh wrote: what i know for a fact
But that is hardly relevant. Somewhere in your application something is being triggered which causes a null reference to be used. The only way to discover where that is and why, is to do some detailed debugging.
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ok i will get to that. juss that i have been looking and and dont see where
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2000 characters? In which encoding? UTF16?
Bastard Programmer from Hell 
If you can't read my code, try converting it here[^]
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sorry for the late response but data field is set to nvarchar 2000
and the MaxInputLength set at 2000
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