How to use GetNativeVariantForObject - C# Discussion Boards

Re: How to retrieve a value from hidden fields in a dataGrid?

18-Mar-03 7:49

If I hide a column with datagrid.Columns(1).visible = False, and the user enters a new record, how can I set a value to the hidden field so that it gets put in the database? Because when I try to access in this fields, I have a error message like if this field does not exist !!!!!

Could you help me

-=zoltx=-

zoltix18-Mar-03 7:51

custom editors in property grid??

18-Mar-03 7:51

In Aspx Dot net......Sorry I forgot

-=zoltx=-

LongRange.Shooter18-Mar-03 7:00

18-Mar-03 7:00

I read the propertyGrid tutorial and I am reading the RAD property grid discussion. But I fail to grasp the part of taking one property type and having it viewed as another type. The one in particular is where a property represents a file location (type string) yet exposes the File Open dialog box. I am assuming that this would be done via a TypeConverter which converts the property type from string to a File Open dialog, but I am just lost in the implementation.

If anyone knows of a tutorial or the implementation of a TypeConverter for this I'd greatly appreciate the help!

Thanks

_____________________________________________
_{The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.}

leppie18-Mar-03 9:36

leppie

18-Mar-03 9:36

Hint: use your favourite decompiler and look at System.Design.dll Smile | :)

I rated this article 2 by mistake. It deserves more. I wanted to get to the second page... - vjedlicka 3:33 25 Nov '02

LongRange.Shooter18-Mar-03 10:31

18-Mar-03 10:31

leppie wrote:
favourite

Are you British, leppie?

On to hacking System.Design.dll! Thanks.

_____________________________________________
_{The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.}

LongRange.Shooter19-Mar-03 5:39

19-Mar-03 5:39

Whoa, leppie!

I searched both of my drives and there is no System.Design.dll installed anywhere!!! So where is that sucker?

Later,

MJ

_____________________________________________
_{The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.}

LongRange.Shooter19-Mar-03 5:53

Deal with DateTime like a taskmanager would do it?

19-Mar-03 5:53

Oops, never mind. The search engine was not searching system directories. Found it!

Later.

_____________________________________________
_{The world is a dangerous place.
Not because of those that do evil,
but because of those who look on and do nothing.}

Chris Richner18-Mar-03 3:18

Chris Richner

18-Mar-03 3:18

Hi,

i had to write something like the task scheduler of windows 2000. Do you have any hints about this issue ? Any source code that can give me a start about how doing something ?

i need task to be daily, weekly, monthly and yearly with start date, week of month and day of week.

how to deal with days, weeks and month, are there enum's ?

.:Greets from Jerry Maguire:.

Re: Deal with DateTime like a taskmanager would do it?

Stephane Rodriguez.18-Mar-03 3:29

Stephane Rodriguez.

18-Mar-03 3:29

The System.Diagnostics namespace is your starting point.

Processes tab : enum existing processes
Applications tab : filter out the Processes tab with those that have a main window handle
Performance tab : use perf counters (Performance Counter class)

Re: Deal with DateTime like a taskmanager would do it?

Chris Richner18-Mar-03 3:48

Chris Richner

18-Mar-03 3:48

sorry, i meant task scheduler not taskmanager, my fault.

.:Greets from Jerry Maguire:.

Re: Deal with DateTime like a taskmanager would do it?

leppie18-Mar-03 9:42

leppie

18-Mar-03 9:42

There is as I remember an article on that here on CP. Many moons back.

I rated this article 2 by mistake. It deserves more. I wanted to get to the second page... - vjedlicka 3:33 25 Nov '02

Generate an xml file with StringWriter(UTF-8) ??

zoltix17-Mar-03 23:39

Re: Generate an xml file with StringWriter(UTF-8) ??

17-Mar-03 23:39

When I try to generate an xml file with StringWriter, I can’t change the encoding (UTF-16) to UTF-8. This application, having to have a format xml(utf-8) To preserve compatibility with other programs.

Ex
StringWriter s = new StringWriter();
XmlTextWriter tw = new XmlTextWriter(s,Encoding.UTF-8);

Don’t work, I am receive a error message “C:\Inetpub\wwwroot\LicenceTools\site\GenerateXmlTreeView.aspx.cs(58): Argument '1': cannot convert from 'System.IO.StringWriter' to 'System.IO.Stream'”

I would like having "?xml version="1.0" encoding="utf-8"?" rather than "?xml version="1.0" encoding="utf-16"?"

Could you help me?

Thanks in advance

PS: It s a stream for WebServer.

Application Code:
Htm:
<%@ Page language="c#" Codebehind="GenerateXmlTreeView.aspx.cs" AutoEventWireup="false" Inherits="LicenceTools.site.GenerateXmlTreeView" %>

C#:
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using ZZDataFromDb.ZZConn;
using ZZTools.ZZTools;
using System.Xml;
using System.IO;
using System.Globalization;
using System.Text;
using System.Xml.XPath;

namespace LicenceTools.site
{
///

/// Summary description for GenerateXmlTreeView.
///

public class GenerateXmlTreeView : System.Web.UI.Page
{

private void Page_Load(object sender, System.EventArgs e)
{
//StringReader = new StreamReader("site/GenerateXmlTreeView.aspx");
string strSelect;
// Put user code to initialize the page here
if( Request.QueryString["select"] != null)
{
strSelect =Request.QueryString["select"];
}else {
strSelect= "";
}
string strIdCompany;
if( Request.QueryString["IdCompany"] != null)
{
strIdCompany =Request.QueryString["IdCompany"];
}
else
{
strIdCompany= "%";
}

DataContainer dc=new DataContainer(); // create a data container for this function
dc.Set("select", strSelect); // add the user name
dc.Set("IdCompany", strIdCompany); // add the user name
DBData dts=new DBData(dc); // create a interface to the DB technology
DataTable DT;
DT = dts.QueryMultiRow("sql_fillTreeView"); // query if the account exists. Always returns a value
//Xml Generate
ArrayContainer Level = new ArrayContainer(100);
StringWriter s = new StringWriter();
//string test = s.Encoding.ToString();
XmlTextWriter tw = new XmlTextWriter(s);// ,Encoding.UTF8

tw.Formatting=Formatting.Indented;
tw.WriteStartDocument();
tw.WriteStartElement("treeview");
tw.WriteAttributeString("title","Licenses Tool");
tw.WriteStartElement("custom-parameters");
tw.WriteStartElement("param");
tw.WriteAttributeString("name","shift-width");
tw.WriteAttributeString("value","15");
tw.WriteEndElement();
tw.WriteStartElement("param");
tw.WriteAttributeString("name","img-directory");
tw.WriteAttributeString("img-directory","images/");
tw.WriteEndElement();

tw.WriteEndElement();
int level=0;
string IdElement;
Level.add("");
string Name;
string IdPrduit;
string IdParent;
string License;
string PrevIdParent="";
string PrevIdElement="";
bool FlagElementFirst= true ;
foreach(DataRow r in DT.Rows){
if (FlagElementFirst == true)
{
Level.Remove(0);
Level.add(r["idParent"].ToString());
}
IdElement = r["id"].ToString();
Name = r["Name"].ToString();
IdPrduit = r["IdPrduit"].ToString();
IdParent = r["idParent"].ToString();
License = r["license"].ToString();
if(( Level[IdParent]>=level ||level==0 ))
{
if((IdParent=="" || IdParent!=PrevIdParent ) && (IdPrduit=="") )
{
Console.WriteLine("Name");
tw.WriteStartElement("folder");
tw.WriteAttributeString("title",Name);
if (FlagElementFirst == true)
{
tw.WriteAttributeString("img","folder");
}
else
{
tw.WriteAttributeString("img","folder");
}
level++ ;
Level.add(IdElement);
PrevIdParent=IdParent;
PrevIdElement =IdElement;
}
else if((IdParent==PrevIdParent)&& IdParent!="" && (IdPrduit=="") )
{

}
else if(IdPrduit!="")
{
string reg;
if(License=="Y") {reg="true";}
else {reg="false" ; }
tw.WriteStartElement("leaf");
tw.WriteAttributeString("title",Name);
tw.WriteAttributeString("url", IdElement);
tw.WriteAttributeString("registered",reg);
tw.WriteEndElement();
//tw.WriteAttributeString("test","test");
}
}
else
{
while(level>Level[IdParent])
{
tw.WriteEndElement();
Level.Remove(level);
level--;
}
if(IdPrduit !="")
{
//tw.WriteElementString(Name,IdPrduit);
string reg;
if(License=="Y") {reg="true";}
else {reg="false" ; }
tw.WriteStartElement("leaf");
tw.WriteAttributeString("title",Name);
tw.WriteAttributeString("url",IdElement);
tw.WriteAttributeString("registered",reg);
tw.WriteEndElement();

}
else
{
tw.WriteStartElement("folder");
tw.WriteAttributeString("title",Name);
tw.WriteAttributeString("img","folder.gif");
Level.add(IdElement);
PrevIdParent=IdParent;
PrevIdElement =IdElement;
level++;
}
}
FlagElementFirst = false;
}
tw.WriteEndDocument();
tw.Flush();
tw.Close();
Response.Clear();
Response.ContentEncoding = Encoding.UTF8;//
//Encoding.GetEncoding(1251) ;
Response.ContentType="text/xml";
Response.Write(s.ToString());
}
#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
}

///

/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///

private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
}

-=zoltx=-

Stephane Rodriguez.18-Mar-03 1:17

Stephane Rodriguez.

18-Mar-03 1:17

using System.IO;
using System.Xml;

MemoryStream ms = new MemoryStream(); 
XmlTextWriter tw = new XmlTextWriter(ms,new System.Text.UTF8Encoding()); 

// -- your xml stuff begins here --
tw.WriteStartDocument();
tw.WriteStartElement("...");
tw.WriteEndElement();
tw.WriteEndDocument();
tw.Flush();
tw.Close(); 
// -- your xml stuff ends here

// convert byte[] to String
String s = System.Text.Encoding.UTF8.GetString( ms.GetBuffer() );
MessageBox.Show( s );

Re: Generate an xml file with StringWriter(UTF-8) ??

zoltix18-Mar-03 3:09

Re: Generate an xml file with StringWriter(UTF-8) ??

18-Mar-03 3:09

Thanks a lot. It works..... somebody, send me an others solution which work too

public class StringWriterWithEncoding : StringWriter
{
Encoding encoding;

public StringWriterWithEncoding (Encoding encoding)
{
this.encoding = encoding;
}

public override Encoding Encoding
{
get { return encoding; }
}
}

Then you'd do:

XmlTextWriter = new XmlTextWriter
(new StringWriterWithEncoding (Encoding.UTF8));

-=zoltx=-

Stephane Rodriguez.18-Mar-03 3:14

Stephane Rodriguez.

18-Mar-03 3:14

I have to admit the StringWriter derived class is a much better approach to the encoding issue. Use it instead of the C-like memory streams I have suggested. Wink | ;)

Re: Generate an xml file with StringWriter(UTF-8) ??

zoltix18-Mar-03 4:01