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I need to get the last day of the month, like April is 30.
Does anyone know the code for C# to get the last day of the month?
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GOOGLE![^]
Search took less than 2 seconds, answer found in even less than that...
First result looks promising...
Learn to use Google.
The best way to accelerate a Macintosh is at 9.8m/sec² - Marcus Dolengo
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day=1
month++
day--
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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I have a picture taken from printscreen which has the dpi=96 and size is 5 by 5 inch.
Now I want to make the image dpi=1200 keeping the same size. How can I do this in C#? Please help me out with some code sample.
Thanks in advance
Faysal
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Hi,
First you have to know that, as much as I know, in GDI+, the exact size of the image is in pixels and it is being calculated by (DPI * demention(in pixel unit)) so you have to calculate the current size in pixel, then calculate the new size and then use this code to create the new image by new size and then set the new DPI:
<br />
Bitmap screenshotBitmap = new Bitmap("c:\\image.jpg");<br />
<br />
Bitmap newBitmap = new Bitmap(screenshotBitmap, newWidth, newheight);<br />
<br />
newBitmap.SetResolution(1200, 1200);<br />
I remember that in some GDI+ coding I had the same problem and I used somthing like this and it worked for me.
Good luck and have fun.
Sojaner!
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Thanks for the reply.
I did it. the original size of my image is 695x700. So I made a new bitmap with the dimension: width= (1200/96)*695 and height= (1200/96)*700. Here my printer's device dpi is 1200 and the screen resolution is 96. Actually I wanted to do this thing for printing the form with high quality. Cause with the screen resolution ( 96dpi ) the printer output is very poor.
But at that time while printing the new bitmap my printer stops responding and if I want to see the print preview window it shows an exception. I think it's totally uneffieicnt. Please tell me a way to print my form screenshot with a high quality in C#.
Code Snippet
Bitmap memoryImage;
Bitmap testImage;
Graphics gfxScreenshot;
private void CaptureScreen()
{
memoryImage = new Bitmap(this.Width-5,this.Height-100);
gfxScreenshot = Graphics.FromImage(memoryImage);
gfxScreenshot.CopyFromScreen(this.Location.X+5, this.Location.Y+100, 0, 0, this.Size, CopyPixelOperation.SourceCopy);
testImage = new Bitmap(memoryImage, 6950,7000);
testImage.SetResolution(1200,1200);
}
private void printDocument1_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
e.Graphics.DrawImageUnscaled(testImage, new Point(100, 100));
}
Thanks for the help...
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I have no experience in printing using C# and/or any other programing language but this is the result of the search I had for you about the DocumentPrint the main class that makes you able to print using the .Net framework:
using System;
using System.IO;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
public class PrintingExample : System.Windows.Forms.Form
{
private System.ComponentModel.Container components;
private System.Windows.Forms.Button printButton;
private Font printFont;
private StreamReader streamToPrint;
public PrintingExample() : base()
{
InitializeComponent();
}
private void printButton_Click(object sender, EventArgs e)
{
try
{
streamToPrint = new StreamReader
("C:\\My Documents\\MyFile.txt");
try
{
printFont = new Font("Arial", 10);
PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler
(this.pd_PrintPage);
pd.Print();
}
finally
{
streamToPrint.Close();
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void pd_PrintPage(object sender, PrintPageEventArgs ev)
{
float linesPerPage = 0;
float yPos = 0;
int count = 0;
float leftMargin = ev.MarginBounds.Left;
float topMargin = ev.MarginBounds.Top;
string line = null;
linesPerPage = ev.MarginBounds.Height /
printFont.GetHeight(ev.Graphics);
while(count < linesPerPage &&
((line=streamToPrint.ReadLine()) != null))
{
yPos = topMargin + (count *
printFont.GetHeight(ev.Graphics));
ev.Graphics.DrawString(line, printFont, Brushes.Black,
leftMargin, yPos, new StringFormat());
count++;
}
if(line != null)
ev.HasMorePages = true;
else
ev.HasMorePages = false;
}
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.printButton = new System.Windows.Forms.Button();
this.ClientSize = new System.Drawing.Size(504, 381);
this.Text = "Print Example";
printButton.ImageAlign =
System.Drawing.ContentAlignment.MiddleLeft;
printButton.Location = new System.Drawing.Point(32, 110);
printButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
printButton.TabIndex = 0;
printButton.Text = "Print the file.";
printButton.Size = new System.Drawing.Size(136, 40);
printButton.Click += new System.EventHandler(printButton_Click);
this.Controls.Add(printButton);
}
public static void Main(string[] args)
{
Application.Run(new PrintingExample());
}
}
I have found it in MSDN, you can try more searches.
Good luck and have fun.
Sojaner!
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Hi everyone.
I want to download a whole website and trace whole web browser's request and response headers.
I guess that the only way to download the whole contents of a web page is using the WebBrowser class. But this class does not have any way to trace this request and responses!
Could anyone help please?
Sojaner!
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Have a look at HttpRequest and HttpResponse; you don't always need a WebBrowser.
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips:
- before you ask a question here, search CodeProject, then Google;
- the quality and detail of your question reflects on the effectiveness of the help you are likely to get;
- use PRE tags to preserve formatting when showing multi-line code snippets.
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Thanx for your reply but I'm almost a pro in using the WebRequest and WebResponse but the fact is that the WebRequest can help you in tracing for 1 step only and for example if there is a <img> tag in the HTML you should find it and request it manually, it is not a problem for simple tags like <img> but the fact is that I want to trace the requests from a Flash Player's object and even if I load the swf file using the WebRequest, I will not have the access to the requests and responses that goes out and comes in to the Flash Player so I need a complete web browser with the full request and response ability!
Sojaner!
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I have the following code:
double numdaysPercentage;
numdaysPercentage = 14/30;
I get an answer like 0.0. I should get an answer like .4666667
Can someone tell me what I am doing wrong.
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If you divide by an int, you get an int.
double n = 14/30.0;
will work
or
double n = 14/(double)30;
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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You are doing integer division, and 14/30 is indeed 0. On the other hand, 14.0/30 will give you what you are looking for.
Cheers,
Vikram.
The hands that help are holier than the lips that pray.
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The suggestions above are good, you can also tag the numbers with an 'd' to indicate they are doubles. (Or 'f' for floats)
double n = 14d / 30d;
Simon
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hello,
im having problem with the conversion from string to float, it works good when there is no character in string, for example :
string a = "1.22235647228796";
string b = "8.742277657e-008";
float a = Convert.ToSingle(a);
float b = Convert.ToSingle(b);
the first conversion will work but second will give error that "string was not is correct format"
any idea to solve it ?
thanks
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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Always use float.TryParse for a start, so you don't get an exception. Not sure how you specify to accept that format, tho.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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Christian Graus wrote: Always use float.TryParse for a start
Not always. Sometimes an exception, due to a missed return value check, is in order. I would prefer an exception in certain instances.
Pits fall into Chuck Norris.
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i didnt specify, when i read single from a file it automatically came, eg
BR.ReadSingle()
TVMU^P[[IGIOQHG^JSH`A#@`RFJ\c^JPL>;"[,*/|+&WLEZGc`AFXc!L
%^]*IRXD#@GKCQ`R\^SF_WcHbORY87??6?N8?BcRAV\Z^&SU~%CSWQ@#2
W_AD`EPABIKRDFVS)EVLQK)JKSQXUFYK[M`UKs*$GwU#(QDXBER@CBN%
Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can
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Try using the NumberStyles enum in the System.Globalization namespace to parse that text.
float b = float.Parse(ExpNumString, NumberStyles.AllowExponent|NumberStyles.Float);
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Hi all,
In my app i have 1 class call sqlconnection which is use for get/update db data. I am use this class to get dataset and after i edit the dataset i will pass back to this class and update it.Example, call sqlconnection method from formA to get and update database:
class sqlconnection:
private OleDbConnection objConn;<br />
private OleDbDataAdapter objAdapter = new OleDbDataAdapter();<br />
<br />
public void DbConnection()<br />
{<br />
objConn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;DataSource=Userprogram.mdb");<br />
}<br />
<br />
public DataSet SelectSQL(String stable,String sProgramName)<br />
{<br />
DataSet ds=new DataSet();<br />
objConn.Open();<br />
objCmdSelecte = new OleDbCommand("Select * From Timeway where TW_Program_Name ='" + sProgramName + "'", objConn);<br />
<br />
objAdapter.SelectCommand = objCmdSelecte;<br />
objAdapter.Fill(ds);<br />
objConn.Close();<br />
return ds;<br />
}<br />
<br />
public void UpdateSQL(DataSet ds)<br />
{<br />
objConn.Open();<br />
objAdapter.Update(ds);<br />
objConn.Close();<br />
}
formA:
sqlconn.DbConnection();<br />
ds = sqlconn.SelectSQL("PS", "Program Ni");<br />
for (int i = 0; i < 16;i++ )<br />
{<br />
ArrayData[i] = ArrayTextbox[i].Text;
ds.Tables[0].Rows[0][i + 1] = ArrayData[i];<br />
}<br />
ds.AcceptChanges();<br />
sqlconn.UpdateSQL(ds);
The problem i am facing is , nothing change to my database.I have already check the dataset which is pass to my sqlconnection class and it have been modified. So what i guess is the problem of objAdapter.update . Can anyone guide me to solve this problem?
thanks in advance
cocoon
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Hi all,
Thank you for those who are read through my question. I have found the solution , very simple, that is add a tablemapping.add() before fill and acceptchanges() and the end when update record.
regard
cocoon
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Hello All,
How to compare two enum types?
Thanks
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If you need to, then you should probably use the one enum in both cases.
you have two options:
1 - cast both to int, if you can make the int values correlate ( but then just use the one enum )
2 - write a method that applies whatever comparison rules you need, by hand.
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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use the typeof(ur enum) with compare() method
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How would that work, exactly ?
Christian Graus
Please read this if you don't understand the answer I've given you
"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )
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