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Hi,
Please help me for the following issues.
In CSharp GetMethods() is returning all the methods and properties of particular Type instead method alone.
How to get the all the methods of particular Type?It should not contain any get,put properties.
I have a sample CSharp program here....
namespace ReflectionDemo
{
class MyClass
{
public void display()
{}
public int RegisterNumber
{
get
{
return 0;
}
set
{
}
}
class ReflectionDemoClass
{
static void Main(string[] args)
{
MyClass mc = new MyClass();
Type tt = mc.GetType();
MethodInfo[] methInfo1 = tt.GetMethods(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
foreach (MethodInfo mI1 in methInfo1)
{
string methodName = mI1.Name;
System.Console.WriteLine(mI1.Name);
}
}
}
output for this program is :
display
get_RegisterNumber
set_RegisterNumber
Above output have both methods and Properties
but i want to get output : display
Could anyone help me to get this answer(I mean only methods of MyClas not the properties)?
By
Rajanbabu
Rajanbabu
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Hi,
You could use MethodInfo.IsSpecialName, so you'll get the methods only by checking (mI1.IsSpecialName == false)
Calin
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Thanks a lot Calin.It's working fine.This solution is very much helpful for my project.
I have one more clarification also please help me if possible,
Issue :
I hope you are aware that restricted methods are not available for Visual basic users.
E.g.,
interface IFunctionParameterDemo : IDispatch
{
[id(1),restricted,helpstring("method Display")] HRESULT Display();
[id(2),helpstring("method Calculate")] HRESULT Calculate();
};
coclass FunctionParameterDemo
{
[default] interface IFunctionParameterDemo;
};
Here method Display() is marked as restricted by the attribute restricted.So we can't use this method from Visual basic(If we call this method from VB,during compile time it will show error as "Method or Interface marked as restricted")
In reflection is there any way to filter out these restricted methods?
Type t = GetType(FunctionParameterDemo);
MethodInfo[] mInfo = t.GetMethods();
foreach (MethodInfo m in mInfo)
{
System.Console.WriteLine(m.Name);
}
output:
Display()
Calculate()
But I want the output : Calculate()
using GetMethods() i want to get the result of Calculate()alone.It should filter out restricted method Display().
Regards,
M.Rajanbabu.
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Can somebody tell me why this code is not working. It keeps saying
"A datasource instance has not has not been supplied for the data source.
Also I have scoured the web for some good documentation on how to set these up on the fly but I have not found any great info. Can somebody point me in the right direction?
private void toolStripButton1_Click_1(object sender, EventArgs e)
{
this.Cursor = Cursors.WaitCursor;
try
{
// Set Processing Mode
reportViewer1.ProcessingMode = ProcessingMode.Local;
// Set RDL file
reportViewer1.LocalReport.ReportPath = (Application.StartupPath + "\\reports\\trdReport.rdlc");
// Supply a DataTable corresponding to each report data source
reportViewer1.LocalReport.DataSources.Add(
new ReportDataSource("getTrends", LoadData()));
// Add the reportviewer to the form
reportViewer1.Dock = DockStyle.Fill;
// Process and render the report
reportViewer1.RefreshReport();
}
catch (Exception ex)
{
StreamWriter writer = new StreamWriter(logFile, true, System.Text.Encoding.ASCII);
writer.WriteLine(System.DateTime.Now);
writer.WriteLine("[generate report]");
writer.WriteLine("[generate report]");
writer.WriteLine(ex);
writer.WriteLine("\r");
writer.Close();
MessageBox.Show(ex.ToString());
//this.Close();
//System.Environment.Exit(0);
}
this.Cursor = Cursors.Default;
}
private DataTable LoadData()
{
// Load data from XML file
DataSet ds = new DataSet();
string myFilePath = (Application.StartupPath + "\\bin\\" + "trd.xml");
ds.ReadXml(myFilePath);
return ds.Tables[0];
}
tia
rafone
Statistics are like bikini's...
What they reveal is astonishing ...
But what they hide is vital ...
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It seems that the code works great. I deleted the report file and it worked.
reafone
Statistics are like bikini's...
What they reveal is astonishing ...
But what they hide is vital ...
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i am developing c# desktop application. in that i want to connect to mysql database which is resides on another system.please give me an idea about this.
i have already replaced [
Data Source=MySQL Database;Server=localhost; user id=root;password=****;database=sample;pooling=true";] to
[Data Source=MySQL Database;Server=http://192.168.1.64; user id=root;password=gvsadmin;database=sample;pooling=true";]
is there any other way todo this?
thanks
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You're changing the connection string to find the machine on the network. There's no other way to find it than this
Christian Graus
Driven to the arms of OSX by Vista.
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This is the way I connect to a MySQL database:
string Connectstring = @"server=00.00.00.00;uid=YourUserID;pwd=YourPassword;database=YourDatabase;";
MySqlConnection ConnMySQL;
MySqlCommand cmdMySql = new MySqlCommand();
ConnMySQL = new MySqlConnection(ConnectString());
cmdMySql.Connection = ConnMySQL;
try
{
ConnMySQL.Open();
//Do your stuff
}
catch (Exception e)
{
System.Windows.Forms.MessageBox.Show("Error:" + e.Message + Convert.ToChar(13) + e.GetType().ToString() + Convert.ToChar(13));
return null;
}
finally
{
ConnMySQL.Close();
}
I don't know if this is an answer to your question ?
My assumption is you adjusted SQL server code, but MySQL connection is different.
You also need to set a reference to the .Net connector component provided by MySQL.
Good luck,
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Good people,
I have a quick question. For the screens in my application, before they load, I need to fetch data from the database, perform some calculations, then load it onto the screen. However, rather than the software just freeze up during this process, I would like the progress bar to indicate the, well, progress towards the screen being loaded.
My question is: how do I make the progress bar show the progress during that process of getting data from the database and updating the screen?
Thanks,
Blitz
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You are correct!
Thanks,
Blitz
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Hi all,
One of my windows application I want to read a text file and add the result into a list view.
What I've done is read the text file in a background thread. It's fine. But from the thread I cannot add data into the UI thread, basically to the list view. What can I do.
When I try to work on with the UI controls I got the following exception.
Cross-thread operation not valid: Control 'listView1' accessed from a thread other than the thread it was created on.
Can someone give me a comment on this.
If I don't use a background thread, while the text file read the UI is completely stuck and not responding.
I appreciate your help all the time...
CodingLover 
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You need to use BeginInvoke[^]/Invoke for cross thread changes.
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Thanks for the comment.
I've solved it using the avoiding the illegal thread calls of the form, with the background thread.
I appreciate your help all the time...
CodingLover
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Hi all,
I have written an XML handler class for a project I am currently writing and all the read and write methods do what I expect of them.
It then occurred to me that the main code in this class should be able to do something along the lines of:
section("firstlevel")
{
section("secondlevel")
{
WriteValue("value1", 1);
WriteValue("value2", 2);
}
}
where "section" is a keyword of my XML class and the open and close curly brace calls XmlWriter.WriteStartElement() and XmlWriter.WriteEndElement() respectively creating section tags "firstlevel" and "secondlevel" as they do.
Google searches tend to turn up statements such as "use the keyword new" etc..
Just wondering on where to start on creating a keyword and if there is a suitable example I can follow to get started. Or if I can even do something like this at all.
Regards,
David Bailey.
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You can't create a keyword, but of course you can create classes and methods. I'm wondering whether or not you are describing a recursive method to write out an XML document.
My preferred method of writing XML is by using an XmlDocument and calling its WriteTo method.
More detail would be required to help further.
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Hi PIEBALDconsult,
Thanks for your reply.
No, I was not describing a recursive method. I was aiming for something that was easy to read and configure as well as being specific to a particular class.
What I was trying for was to override the curly braces, but apparently this is not allowed either. The curly braces would then have acted upon the new class keyword "section" to open and then close that section. The WriteValue("value1", 1) method would then place a value into the section.
using the above sample code, I would then get the output along the lines (minus the headers etc):
<firstlevel>
<secondlevel>
<value1>1</value1>
<value2>2</value2>
</secondlevel>
</firstlevel>
The "section" could be a method, granted, but then how do I complement it with curly braces such that
section("firstlevel")
{
}
could replace
openSection("firstlevel");
.
.
closeSection();
where openSection/closeSection are defined something like (just rough pseudo code)
XmlWriterSettings settings = new XmlWriterSettings();
XmlWriter writer = XmlWriter.Create(SettingsFile, settings);
private void openSection(string sect)
{
writer.WriteStartElement(sect);
}
private void closeSection()
{
writer.WriteEndElement();
}
I hope this makes sense. There is no great loss if I cannot achieve what I am aiming for. But it would be really good if it could be achieved.
Thanks again,
David.
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Sounds like you need a DSL, Domain Specific Language. The purpose of a DSL is to provide a language that models your business needs better than a general language like C#, if such a thing is needed. You can find more here:
Domain Specific Language @ Wikipedia
DSL in Visual Studio
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Thanks for everyone's input. I might put this into the "Too hard basket" for the moment.
-David.
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Hello everyone,
I am looking for a sample, which could let me deserialize an XML stream encoded in UTF-8 into a field of a class. More specifically, I have a class like,
class Foo
{
string abc;
byte[] bcd;
}
and abc maps to XML element "Abc" and bcd maps to XML element "Bcd", and I want to get the stream for bcd and retrieve bytes (from XML stream for related element "Bcd" directly) to manipulate manually/in a customized way.
I am looking for a sample, but failed, could anyone help to point me to a related sample or wrote some pseudo code?
thanks in advance,
George
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap;
[Serializable]
class Customer {
public string name;
public long id;
}
class Test{
static void Main(string[] args) {
ArrayList list = new ArrayList();
Customer cust = new Customer();
cust.name = "Charles Darwin";
cust.id = 10;
list.Add(cust);
cust = new Customer();
cust.name = "Isaac Newton";
cust.id = 20;
list.Add(cust);
foreach(Customer x in list){
Console.WriteLine("{0} : {1}", x.name.ToString(), x.id.ToString());
}
Console.WriteLine("Saving Customer list");
FileStream s = new FileStream("cust.txt", FileMode.Create);
SoapFormatter f = new SoapFormatter();
f.Serialize(s, list);
s.Close();
Console.WriteLine("Restoring to New List");
s = new FileStream("cust.txt", FileMode.Open);
ArrayList list2 = (ArrayList)f.Deserialize(s);
s.Close();
foreach(Customer y in list2){
Console.WriteLine(y.name + ":" + y.id);
}
}
}
//You have to reference in using System.Runtime.Serialization.Formatters.Soap;
//just right click on the reference folder and click add. Its under the web tab.
//Let me know if this helps
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Thanks Zap-Man!
I do not think your reply is directly related to my question. Here is a little more response.
The XML is SOAP reaponse from server, in the response there is one response XML element (element Bcd in my sample) which is encoded by UTF-8 from server side, but since Http Web Services will use base64 at client side, so each time I receive such "bytes" at client side and the automatically generated web services proxy will throw exception says invalid XML element in base64 encoding. So, I am thinking about how to overwrite the default using base64 encoding to decode the bytes, and this is why I ask this question. If there could be a way to accept stream or something similar represents the on-wire bytes of the related response elements (Bcd in my sample) and let me manipulate, it will be so great!
regards,
George
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Another question for today lol,
Is it possible to make the enter(return) key call the Validated event of a textbox? In other words, I have stuff happening when a user presses the tab key with text entered in the textbox, and i want the same stuff to happen if he presses the enter key. I searched msdn and coudn't find anything...any ideas? Thanks =)
Yup, I'm a NEWB
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Try something like this:
public partial class Form1 : Form
{
List<button> buttons = new List<button>();
int counter = 0;
int maxButtons = 10;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if (counter < maxButtons)
{
Point loc = new Point();
buttons.Add(new Button());
loc.X = ClientRectangle.X + (counter * 50);
loc.Y = ClientRectangle.Y + (counter * 50);
buttons[counter].Location = loc;
buttons[counter].Name = "Input name with some variable?";
buttons[counter].Click += new EventHandler(ButtonClickEvent1);
this.Controls.Add(buttons[counter]);
counter++;
}
else
{
throw(new Exception("Too many buttons"));
}
}
catch (Exception ex)
{
MessageBox.Show("A system error ocurred:\n" + ex.Message, "System Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
void ButtonClickEvent1(object sender, EventArgs e)
{
}
void ButtonClickEvent2(object sender, EventArgs e)
{
}
}</button></button>
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Hi “High Octane”
YES YOU CAN! Been there and done it!
I am also a NEWB, I am also new to pasting replies on the code-project.
If (matter.resolved==false)
{
Read on!
}
I am assuming you are want to use the return/enter key to move from one textbox to another but validating the data that has been entered.
A group of textboxes for example? with the "Type in data then press enter" option?
I am not sure how you are validating your data but assume that you use the “Causes validation” property of the textbox. Personally I have a separate validation method fired by the leave event of the textbox.
I also use a keydown event for the same textbox.
In that event I call the "SelectNextControl" method once the return key was pressed.
The "SelectNextControl" method does what it says on the tin, but There are five parameters to it.
These are:-
Ctl
The Control at which to start the search.
forward
true to move forward in the tab order; false to move backward in the tab order.
tabStopOnly
true to ignore the controls with the TabStop property set to false; otherwise, false.
nested
true to include nested (children of child controls) child controls; otherwise, false.
wrap
true to continue searching from the first control in the tab order after the last control has been reached; otherwise, false.
Return Value
true if a control was activated; otherwise, false.
If you using a few textboxes then generate two event handlers one for keydown and one for leave and connect each textbox to the SAME EVENT HANDLER and use “case statements” switched from the name of the textbox. I can show you how to do this if necessary(just post a reply) I have about a dozen textboxes on one form and use ONE “Leave event” handler to handle EVERY ONE OF THEM and the return key can move between them.
I use the leave event to validate and enter the data into the program.
I use the keydown event is to detect if a key is down (crazy that eh!)
I have several textboxes and the use exactly the same leave and keydown event handlers, in the case below "tbxUpper"
private void tbxUpper_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
TextBox tbx = (TextBox)sender;
SelectNextControl(tbx, true, true, true, true);
}
}
the above event actually fires every time a key is presses in a text box but the "if statement" looks for the return key. when the return key is pressed a textbox called tbx is generated and copied from sender then the next control is selected.
I don't know if this actually helps you.
If you need furthur help post a reply "and then hit Enter"!!
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