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How to generate a guid (global Unique Identifier) in C#? Thanks
chris#
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I know this one:
Marshal.GenerateGuidForType
[C#]
public static Guid GenerateGuidForType(
Type type
);
Returns the GUID for the specified type, or generates a GUID using the algorithm used by the Type Library Exporter (TlbExp.exe).
Andres Manggini.
Buenos Aires - Argentina.
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Guid.NewGuid();
James
Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978
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James T. Johnson wrote:
Guid.NewGuid();
Boy. That is sure easy!
Nish
Oh, I don't know why she's
leaving, or where she's gonna go
I guess she's got her reasons but I just don't wanna know
'Cos for 24 years I've been living next door to Alice
24 years just waitin' for a chance
To tell her how I feel and maybe get a second glance
Now I gotta get used to not living next door to Alice
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I have created a databinding DataList, and OnSelectedIndexChanged event, I have a SelectedItemTemplate to show additional two lines of details right below the row Selected, which makes it look like expandable/collapsible tree. But I can only expand one row at a time. What I want is to have an ability to expend more rows. ( like treeview control does). Can datalist support multiple selections?
If someone is interested in this question, give me an email, I will send you an image of what I have now.
chris#
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The ListBox gets populated by SQL server database (databinding), I need to support multiple selection so that I can retrieve all the selected values in the ListBox and send them back to database as sql statement and then get the result back to show in the web page.
My question is: How can I construct the sql statement with parameter (array) that reflect those selections in ListBox? e.g. In sql statement " Where id=@id" works for single parameter, if id is type of int, @id is also type of int. Now I have an id array holding the selected id from ListBox. What will be the array type. How can I construct sql ?
Chris#
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You'll have to create an "or" separated parameter list for the Where
Taking your example:
"... Where id=1 or id=2 or id=3 "
So, I would say a for statement iterating through the array, getting each value and adding "or id=" + value
Something along theselines..
I'm not sure if this is clear enough, if you have any questions about it, i'll try to clarify.
Andres Manggini.
Buenos Aires - Argentina.
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Thanks! I will try your way. I just posted another 2 questions. You may have idea too! Thanks again!
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Andres should work but you can shorten it down by using the "IN" keyword.
WHERE id IN ( @id1, @id2, @id3, ... ) I'm pretty sure you'll have to use dynamic sql generation if you try this in a stored proc though.
James
Sonork ID: 100.11138 - Hasaki
"Smile your little smile, take some tea with me awhile.
And every day we'll turn another page.
Behind our glass we'll sit and look at our ever-open book,
One brown mouse sitting in a cage."
"One Brown Mouse" from Heavy Horses, Jethro Tull 1978
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I created a method to generate sql string "where clause", and then append the string to the first part of sql. It works fine. Thanks for both of your help.
chris#
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A post on the lounge reminded me of something I've been meaning to look up for a while: benchmark tests on .NET.
Does anyone know of any benchmarks available, and, would anyone be interested in porting some standard benchmarks to C#, VB.NET and/or Managed C++?
cheers,
Chris Maunder
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Here (MSDN - Microsoft)
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/Dnbda/html/Bdadotnetarch13.asp
You'll find a few perfomance comparison like Data Acces Techniques or Transaction Control.
I would be interested, what kind of benchmarks do you have in mind ?.
Andres Manggini.
Buenos Aires - Argentina.
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How does one go about creating a control that acts as a container such as a panel control or the old SSTabs control?
my example is this: im creating a tab control that acts like the SSTabs control of studio 6.0. while in design mode, a user can add tabs with a properties dialog. By clicking the added tabs, one can access a separate container for each tab, allowing the user to create controls that reside in that tab's assigned container.
I'm really stuck on this one and i havent had any luck in the usual search engines (codehound, msdn, etc)
thanks
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Ive got a tab control im building from scratch. the control has a collection(ArrayList) of MyTab objects. How do i expose the collection so that in the properties of the control in design view, a user may add a MyTab object and set its properties?
If i simply expose the collection publicly, the "Collection..." field shows up, but the 'add' button only adds a System.Class. I need the add button to display a MyTab object.
you can see specifically what i want if you create an toolbar object on a form and click 'Buttons' in the properties section. when you add a new button, it shows up on the form and a 'toolbarbutton' object is created with properties you may edit.
do i have to impliment my own collection class?
thanks
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In C# how can i get the string's rendering width?
I cant find it in msdn...
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Its a kind of reposting,but forgive me because of that.
I read some MSDN doc but I didin't get anything.When I add record to dataset for updating dataadapter I have to use Update() method,but it force me to use UpdateCommand,but I did not modify any record,I add record.so why it force for that?OleDbCommandBuilder does not make insert and update command for me automaticly Does anybody know any sample about it?Of cource not MSDN samples.
Thanks
Mazy
"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975
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I created an application that Store an ArrayList (of file and file data) in a File using Serialization with BinaryFormater.
What I want to do it's to load each filepath stored in the file I created with the Serialization and create the path. After the path is created I want to store the data of the equivalent file that is store in the file I created with the Serialization in the new file I created in the loading process.
My problem is here :
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Text;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
namespace MultipleFile
{
///
/// Summary description for Form1.
///
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private ArrayList r,w,data,read,n,m;
private BinaryFormatter a,b,c;
private StreamReader reader;
private StreamWriter sr;
private string path,content,npath;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
r = new ArrayList();
w = new ArrayList();
data = new ArrayList();
read = new ArrayList();
a = new BinaryFormatter();
b = new BinaryFormatter();
c = new BinaryFormatter();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(32, 20);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "Open";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(32, 52);
this.button2.Name = "button2";
this.button2.TabIndex = 1;
this.button2.Text = "Create";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(32, 88);
this.button3.Name = "button3";
this.button3.TabIndex = 2;
this.button3.Text = "Write";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(32, 120);
this.button4.Name = "button4";
this.button4.TabIndex = 3;
this.button4.Text = "Test";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(128, 158);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.button4,
this.button3,
this.button2,
this.button1});
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
OpenFileDialog o = new OpenFileDialog();
o.Filter = "All Files (*.*)|*.*";
if(o.ShowDialog() == DialogResult.OK)
{
r.Add(o.FileName);
reader = new StreamReader(o.FileName);
string text = reader.ReadToEnd();
data.Add(text);
}
}
private void button2_Click(object sender, System.EventArgs e)
{
Stream s = File.Open("D:\\path.dat",FileMode.Create,FileAccess.ReadWrite);
a.Serialize(s,r);
Stream ss = File.Open("D:\\data.dat",FileMode.Create,FileAccess.ReadWrite);
b.Serialize(ss,data);
s.Close();
ss.Close();
}
--->> private void button3_Click(object sender, System.EventArgs e)
{
Stream s = File.Open("D:\\path.dat",FileMode.Open,FileAccess.Read,FileShare.None);
w = (ArrayList)a.Deserialize(s);
foreach(string i in w)
{
MessageBox.Show(i);
}
Stream ss = File.Open("D:\\data.dat",FileMode.Open,FileAccess.Read);
w = (ArrayList)a.Deserialize(ss);
foreach(string d in w)
{
MessageBox.Show(d);
}
s.Close();
ss.Close();
}
private void button4_Click(object sender, System.EventArgs e)
{
Stream s = File.Open("D:\\test.dat",FileMode.Open,FileAccess.Read);
w = (ArrayList)b.Deserialize(s);
read = (ArrayList)b.Deserialize(s);
s.Close();
}
}
}
can you copy this code and try it and you will see what I mean. I want to replace the button3_onclick event where the MEssageBox are with a File Creation and data transfer to the new file created... and I want to create it in ONE file (store the data and the file path in the same file not in two separate files)
Thanks a lot, thanks thanks thanks 
Jonathan Pouliot
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I haven't run the code, but why don't you just do something like this ?
Stream s = File.Open("D:\\path.dat",FileMode.Create,FileAccess.ReadWrite);
a.Serialize(s,<<whatever>>);
b.Serialize(s,<<whatever>>);
Wouldn't that work ?.
Andres Manggini.
Buenos Aires - Argentina.
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yes that's work, the first BinFormater (a) will store the path and the second (b) will store the data of each files
I'm ok for the Storing(Save) but my problem is when I want to Deserialize the file to take the data from the (a) to create file and the data from the (b) to store it to the new file I create in (a).
Do you understand what I want to do ?
I know it's not clear but it's the way I want this thing works
Thanks
Jonathan Pouliot
TeckSys Developer
http://www.tecksys.com
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Let me see if I understand correctly.
You have two arrays, one contain a list of file names, the other a list of data corresponding to each file.
So, you want to create as many files as the first array contains, and write the data contained in the second array to the corresponding file.
is this correct ?.
this sentence confuses me:
/* copy */
I want to replace the button3_onclick event where the MEssageBox are with a File Creation and data transfer to the new file created... and I want to create it in ONE file (store the data and the file path in the same file not in two separate files)
/* copy */
what do you mean by "(store the data and the file path in the same file not in two separate files)" ?
Andres Manggini.
Buenos Aires - Argentina.
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you almost got it :
I want to create a file(just one file) in with I will store all the file path and each of these file DATA.
this Part i'm ok.
the part I don't know how :
When I load the file i created with all the file path and file data in, I want to retake all the file path one by one and recreate the file corresponding to the file path with his DATA ( it's something like a copy process, but all the file path and data are store in one file and when I load the file I want to replace all the files at their place with their data)
Is it more clearful now ? I hope, because I don't know very well how I can explain this. And I'm french so ...
Jonathan Pouliot
TeckSys Developer
http://www.tecksys.com
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I used to see if the control key was being held down while scrolling the mouse wheel with
GetAsyncKeyState( VK_CONTROL )
What is the preferred way of determining if a keystroke is currently pressed in C#/.NET?
Thanks a million!
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Found something close already...
Tis funny, you rack your brain for 2 hours, post something, then find it 5 minutes later and feel like a dope.
if(( Control.ModifierKeys & Keys.Control ) == Keys.Control )
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