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sr.ReadToEnd will read to the end from the current position. Make sure the position is 0 before reading to end. Also, don't touch the memory stream after it has been disposed. The using(...) block will dispose the object; it will actually compile down to this:
StreamReader sr = null;
try
{
sr = new StreamReader(ms);
message = sr.ReadToEnd();
}
finally
{
if(sr != null)
{
sr.Dispose();
}
}
Since it gets disposed when the using block leaves scope, callign ms.Position = 0 after the using scope is going to cause problems.
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Hi,
I am trying to make no difference between the . (dot) and , (comma) which is typed by the user in a textbox.
I got an array of 20 textboxes. How can i change this for all the textboxes?
I tried this:
private double[] _answer = new double[20];
private TextBox[] _textBox = new TextBox[20];
private Label[] _labels = new Label[20];
private double _tempAnswer;
foreach (Control textbox in this.Controls)
{
if (textbox is TextBox)
{
int controlIndex = 0;
for (int k = 0; k < 20; k++)
{
string decimalSeparator = System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
this._tempAnswer = Convert.ToDouble(this._textBox[k].Text.Replace(".", decimalSeparator).Replace(",", decimalSeparator));
this._answer[controlIndex] = this._tempAnswer;
}
}
}
I don't get error's in compile time but in run time.
The error i get is "Input string was not in a correct format".
And my input was the first time the . (dot) second time , (comma). Both give me that error pointing to this line:
this._tempAnswer = Convert.ToDouble(this._textBox[k].Text.Replace(".", decimalSeparator).Replace(",", decimalSeparator));
What am i doing wrong?
Thanks in advance!
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You don't want to replace the '.' with anything, just replace the ',' with a '.'
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Hello,
Yustme wrote: What am i doing wrong?
It depends on what your input Text was.
But, you shouldn't use the Convert.ToDouble Method.
Better use:
double d;
if(double.TryParse(this._textBox[k].Text,System.Globalization.NumberStyles.Float, CultureInfo.CurrentCulture, out d))
{
}
In this case there is no Exception.
Yustme wrote: Text.Replace(".", decimalSeparator).Replace(",", decimalSeparator));
Never seen that bevor?
Hope that helps
Martin
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Hi guys,
This is what i got now:
foreach (Control textbox in this.Controls)
{
if (textbox is TextBox)
{
double d;
for (int k = 0; k < 20; k++)
{
if (double.TryParse(this._textBox[k].Text, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.CurrentCulture, out d))
{
string decimalSeparator = System.Globalization.CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
}
}
}
}
I don't get any error's but its not working either.
I was wondering what i had to put in the "if(double.TryParse..." body?
Thanks in advance!
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Hello,
string _decimalSeparator = System.Globalization.NumberFormatInfo.CurrentInfo.NumberDecimalSeparator;<br />
<br />
string input = this._textBox[k].Text;<br />
input = input.Replace(".", decimalSeparator );<br />
input = input.Replace(",", decimalSeparator );<br />
<br />
double d;<br />
if(double.TryParse(input ,System.Globalization.NumberStyles.Float, CultureInfo.CurrentCulture, out d))<br />
{<br />
}<br />
This should do it!
All the best,
Martin
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Hi Martin,
Thanks for your reply!
I've been debugging it for like 30 times now to see where it go's wrong.
The double d seems not to getting the right separator from "input".
My input was 0.5 and it gets replaced by the , (comma).
In the body of the if statement, the d has 0.5 as value instead of 0,5 which is the value of "input".
Never did anything with Globalization. I also want to know what "out d" does.
Can you look into this again for me please?
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Hello,
Yustme wrote: I also want to know what "out d" does.
This is just the out parameter of the TryParse Method.
That means, you give the reference of your lokal double variable "d" to the method, and you will get the result out of the Method on exactly the same variable.
This Method is using the possibility of the out parameter, because the return value is boolean.
The parsing too double was only ok, if the return value is true.
Therefore you have to put the code into an if statement, like I did.
Yustme wrote: In the body of the if statement, the d has 0.5 as value instead of 0,5 which is the value of "input".
please send the whole code lines.
All the best,
Martin
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Hi Martin,
Thanks again for your reply!
This is the code where i try to convert the separator:
foreach (Control textbox in this.Controls)
{
if (textbox is TextBox)
{
int controlIndex = 0;
for (int k = 0; k < 20; k++)
{
string decimalSeparator = System.Globalization.NumberFormatInfo.CurrentInfo.NumberDecimalSeparator;
string input = this._textBox[k].Text;
input = input.Replace(".", decimalSeparator);
double d;
if (double.TryParse(input, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.CurrentCulture, out d))
{
this._tempAnswer = d;
this._answer[controlIndex] = this._tempAnswer;
}
}
}
}
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Hello,
Yustme wrote: foreach (Control textbox in this.Controls)
{
if (textbox is TextBox)
{
Do I have too understand why you are doing that?
Yustme wrote: string input = this._textBox[k].Text;
input = input.Replace(".", decimalSeparator);
You forgot:
input = input.Replace(",", decimalSeparator );
Yustme wrote: if (double.TryParse(input, System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.CurrentCulture, out d))
{
this._tempAnswer = d;
this._answer[controlIndex] = this._tempAnswer;
}
When you debug, are you jumping in if statement?
Martin
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Hi Martin,
The foreach statement is to iterate through my array of textboxes i got on my Form.
I removed the line: input = input.Replace(",", decimalSeparator ); since its standard in my configuration (windows: control panel).
When i debug, i get in the body of the if statement yes.
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Hello,
Yustme wrote: The foreach statement is to iterate through my array of textboxes i got on my Form.
But now you are doing it twice, or not
You have the "foreach" and than inside the "for".
I would think, the "for" should do it.
Yustme wrote: I removed the line: input = input.Replace(",", decimalSeparator ); since its standard in my configuration (windows: control panel).
But if you install your project on a second PC, you will have a problem at this point.
Yustme wrote: When i debug, i get in the body of the if statement yes.
That means the conversion to double was good.
So, aren't you happy? Or is there an other problem.
All the best,
Martin
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Hello,
Yustme wrote: for (int k = 0; k < 20; k++)
{
Why "20"?
I would prefere:
for (int k = 0; k < this._textBox[].Length; k++)
All the best,
Martin
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Hi,
I made an eventhandler for handling keys. I no longer handle the . (dot), it drives me crazy.
Thanks for your time and help!
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Yustme wrote: I got an array of 20 textboxes. How can i change this for all the textboxes?
Create a class that dervives from TextBox and do whatever it is you are trying to do in that class. It would be a lot cleaner that way.
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Hi,
Sounds intresting. I never did such thing before.
Do you got a sample about that?
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Hi All,
As i need to pass some values from .net dll to html page. I embedded the .net dll using object tag. As well as i am ablt o pass values from html page to .net dll using PARAM tag. After clicking the button in dll , i want to pass return value to the html page. As i am novice in this, can anyone help me to get resolve the same.
As I need it very urgently, can anyone help me.
Thanks in advance,
Aruna
Aruna
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So I have a text file in my projects resources that I need to read into an array.
It's path is:
global::Project1.Properties.Resources.rar
it returns byte[]
How would I get information from this file?
- Munty
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Hi
try this
using (Stream s = this.GetType().Assembly.GetManifestResourceStream("Project1.Properties.Resources.rar"))
{
// Read the content into byte array.
}
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Hi,
Thanks for replying.
this.GetType().Assembly.GetManifestResourceStream("string") keeps on returning null.
Doesnt matter what I use it with, even files that I successfully use elsewhere will always return a null :/
Here are one of the tests that returned a null:
Object o = this.GetType().Assembly.GetManifestResourceStream("Project1.Properties.Resources._01")
This shouldnt have returned a null because I've used that resource elsewhere for an image.
Here is the code I used that resource for that worked:
imagePanel[0] = Project1.Properties.Resources._01;
- Munty
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hi munty
have you set the build action property of the file to Embedded Resource?
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Tried it as Embedded Resource, Content and None in the Build Action property.
Null on all of them :/
- Munty
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Finally got the damned thing to work.
Turns out I could use this line:
TextReader tr = new StreamReader(GetType().Assembly.GetManifestResourceStream("Project1.Resources.rar.txt"));
After I fiddled with the properties file so that it returned a string instead of a byte array.
Wierdly enough I can still get properties and stuff from the file from:
Project1.Properties.Resources.rar
I just cant do anything like read in from it when using that line.
Well it's finished. Thank god for that.
- Munty
-- modified at 12:46 Friday 17th November, 2006
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Hello All,
i have a property in my DataClass and i bound it to a control
<br />
Binding adminBind = new Binding("Checked", user, "IsAdministrator");<br />
this.chkIsAdmin.DataBindings.Add(adminBind);<br />
this Property throw an Exception when some conditions not meet (this code is inside the set of the Property).
<br />
public bool IsAdministrator<br />
{<br />
get { return Convert.ToBoolean(_Record.WL_ISADMIN.Value); }<br />
set<br />
{<br />
if (value)<br />
{<br />
if (CanBeTheUserAdmin())
{<br />
_Record.WL_ISADMIN.Value = value;<br />
}<br />
else
throw new Exception("Δεν Μπορείτε να κάνετε τον Χρήστη Administrator διότι Υπαρχει ήδη Administrator για το Συνεργείο!!");<br />
}else
_Record.WL_ISADMIN.Value = value;<br />
}<br />
}<br />
right now when the exception is thrown the control just DON'T lose Focus, and the user get confused.
How can i cath the Exception in order to show the Exception Message to the User??
Any Saggestion is most Wellcome!
Nassos
-- modified at 7:41 Thursday 16th November, 2006
GanDad
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From everything I read the compiler doesn't create properties in the IL it creates, it creates a method for setting a value and a method for getting the value. In the java world using accessor methods in the code is the way things are done and it works fine. Apart from the syntax of setting or getting a property value from code, which may be a bit nicer than the method syntax and the fact that people should learn to behave themselves in get{} code (I once worked with someone who changed the selected index of a combo in a VB6 Property Get for a comboBox, great fun when putting watches on things) I can see no advantages in using properties over accessor methods. At the same time I can see problems like the inability of c# to create Property delegates (i'm talking well behaved ways here) encouraging me to use accessor methods.
Can anyone think of reason why I should use properties in my code? Do we just blindly do things this way because we always used them in VB or because the books teach it that way?
Russ
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