C# Discussion Boards - CodeProject

baranils4-Jan-11 19:41

baranils

4-Jan-11 19:41

Hello
Thank for your reply

No particular reason I just need the best way to send string parameter from one running .NET app to another running one
The second should trigger an event when receiving a message

kubben5-Jan-11 1:56

kubben

5-Jan-11 1:56

Well,

If you just want it to trigger an event in the second app, they my article should work ok. Windows message won't allow you to pass a string in. So if the string it self is important you will have to do something different. If the string has certain characters that should cause something to trigger in the second app, you can just check for those in the first app and then send a windows message.

Let me know if the string is important to the second app or not.

Ben

baranils5-Jan-11 2:23

baranils

5-Jan-11 2:23

Hello Kubben

Yes the string is important

APP A (.NET) is running
APP A require a Form from APP B (.NET) To show user "abc"

So I check if APP B is already running
If NO : I launch it using Process.Start("APP B","abc");
If YES : I want to trigger an event for APP B to show user "abc"

kubben5-Jan-11 2:42

kubben

5-Jan-11 2:42

Well,

You can try using FindWindow to get the second app windows handle. Then you should be able to send a string to it.

There are some examples out there.

I found this one:
http://social.msdn.microsoft.com/forums/en-US/vbinterop/thread/62d0c25f-dadb-4b24-9679-f9f75717456c/

Hopefully, that helps.

Ben

autogenerated delete button

baranils5-Jan-11 3:44

baranils

5-Jan-11 3:44

Thank you

I'll let you now

tauras8131-May-07 2:32

tauras81

31-May-07 2:32

hi

i want to show the autogenerated delete button in grid view on some selected rows can anybody help me

Re: autogenerated delete button

kubben31-May-07 3:08

kubben

31-May-07 3:08

If you only want to show a delete button on certain rows of the gridview you should probably create a template button column that has a delete button. Set the visible = false, then you can in the template you can set the visible property based off some info in the datarow that you are displaying in that row.

The code might be something like:
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="btnDelete" runat="server" CommandName="Delete" Text="Delete" Visible='<%# Convert.ToBoolean(DataBinder.Eval(Container.DataItem,"ShowDelete").ToString() == "Yes") %>' />
</ItemTemplate>

This of course assumes that you have a column called ShowDelete and it will contain Yes when you want to show the delete button. So you would probably have to change that part.

Ben

Re: autogenerated delete button

Manoj Kumar Rai31-May-07 4:59

Manoj Kumar Rai

31-May-07 4:59

Hi,
You can use DataGridView control on a windowform.

1) Select the DataGridView control and right click on it.
2) Select the "Add Column"/"Edit Column" option from from the popup menu to define and modify the column types.
3) In the dialog you can define the column. Also you can set the "ColumnType" property as "DataGridViewButtonColumn" for the column you want to display a Delete Button.
4) Please note that you can make these buttons conditionally in-visible.

Manoj
Never Gives up

automated delete button in grid view

tauras8131-May-07 2:31

tauras81

31-May-07 2:31

hi

i want to show the autogenerated delete button in grid view on some selected rows can anybody help me

SMS log file deleting tool

Software_Specialist31-May-07 2:03

Software_Specialist

31-May-07 2:03

I want to write an application which deletes SMS(System Management Server) client log files....
Any one here could provide me with a logic to write such application....or to provide me with an example...
Thanks a lot

prevent System.Windows.Forms.TabControl.ControlCollection to change SelectedIndex at Remove method

Martin#31-May-07 0:30

Martin#

31-May-07 0:30

Hello everybody!

I'm working on an application which has UserControls (GUI pages) with TabControls on it.
This TabControls are Usercontrols derived from Windows.Forms.TabControl.
Same to TabPage.
The TabPage class has a "Visible" property which removes the TabPage from TabControl.TapPages property, if it's set to false.
This Visible property is refreshed over an userdefined binding mechanism.
This means if I change my page, the Visible property of the TabPages will be refreshed.
On default the SelectedIndex property of the TabControl is set to "0".

Now what's my problem:
I allways had strange visual effects as the TabPages where removed from the Collection.
I saw the different TabPages flickering until all the TabPages where removed.

Thank's to Lutz Roeder's reflector I found out that the framework is forcing the SelectedIndex property after removing the tabpage.

public override void Remove(Control value)
{
    base.Remove(value);
    if (value is TabPage)
    {
        int index = this.owner.FindTabPage((TabPage) value);
        if (index != -1)
        {
            this.owner.RemoveTabPage(index);
            this.owner.SelectedIndex = Math.Max(index - 1, 0);
        }
        this.owner.UpdateTabSelection(false);
    }
}

I now whant to find a solution which prevents the SelectedIndex property to change when removing a TabPage.

What I was thinking of:
As the SelectedIndex property is not virtual I'm not able to override it in my TabControl class.
Maybe I could inherit a TabPageCollection class, for my TabPages property of TabControl class, which overrides the "Remove" method. And after that ????

Thanks for your time.

All the best,

Martin

Loading multiple assemblies

Raja Gupta31-May-07 0:17

Raja Gupta

31-May-07 0:17

hi friends....

I have got a problem regarding loading of multiple assemblies, actually its required for an editor which implements the intellisenseas in vb or dotnet.
for that it is required to load that assembly whose sub-classes are required to be loaded into the list box after pressing dot.

for example in the code given below i have given the path of System.dll assembly file, now all the sub class of System.Data are automatically displayed in list box but if i need to load more than one assmbly i.e 5-6 assemblies how should i do that.

source code

private void readAssembly()
{
this.treeViewItems.Nodes.Clear();
namespaces = new Hashtable();

Type [] assemblyTypes = assembly.GetTypes();
this.treeViewItems.Nodes.Clear();

// Cycle through types
foreach (Type type in assemblyTypes)
{
if ( type.Namespace != null )
{
if ( namespaces.ContainsKey(type.Namespace) )
{
// Already got namespace, add the class to it
TreeNode treeNode = (TreeNode) namespaces[type.Namespace];
treeNode = treeNode.Nodes.Add(type.Name);
this.addMembers(treeNode,type);

if ( type.IsClass )
{
treeNode.Tag = MemberTypes.Custom;
}
}
else
{
// New namespace
TreeNode membersNode = null;

if ( type.Namespace.IndexOf(".") != -1 )
{
// Search for already existing parts of the namespace
nameSpaceNode = null;
foundNode = false;

this.currentPath = "";
searchTree(this.treeViewItems.Nodes,type.Namespace,false);

// No existing namespace found
if ( nameSpaceNode == null )
{
// Add the namespace
string[] parts = type.Namespace.Split('.');

TreeNode treeNode = treeViewItems.Nodes.Add(parts[0]);
string sNamespace = parts[0];

if ( !namespaces.ContainsKey(sNamespace) )
{
namespaces.Add(sNamespace,treeNode);
}

for (int i=1;i < parts.Length;i++)
{
treeNode = treeNode.Nodes.Add(parts[i]);
sNamespace += "." +parts[i];
if ( !namespaces.ContainsKey(sNamespace) )
{
namespaces.Add(sNamespace,treeNode);
}
}

membersNode = treeNode.Nodes.Add(type.Name);
}
else
{
// Existing namespace, add this namespace to it,
// and add the class
string[] parts = type.Namespace.Split('.');
TreeNode newNamespaceNode = null;

if ( !namespaces.ContainsKey(type.Namespace) )
{
newNamespaceNode = nameSpaceNode.Nodes.Add(parts[parts.Length-1]);
namespaces.Add(type.Namespace,newNamespaceNode);
}
else
{
newNamespaceNode = (TreeNode) namespaces[type.Namespace];
}

if ( newNamespaceNode != null )
{
membersNode = newNamespaceNode.Nodes.Add(type.Name);
if ( type.IsClass )
{
membersNode.Tag = MemberTypes.Custom;
}
}
}

}
else
{
// Single root namespace, add to root
membersNode = treeViewItems.Nodes.Add(type.Namespace);
}

// Add all members
if ( membersNode != null )
{
this.addMembers(membersNode,type);
}
}
}

}
}

///

/// Adds all members to the node's children, grabbing the parameters
/// for methods.
///

/// <param name="treeNode" />
/// <param name="type" />
private void addMembers(TreeNode treeNode,System.Type type)
{
// Get all members except methods
MemberInfo[] memberInfo = type.GetMembers();
for (int j=0;j < memberInfo.Length;j++)
{
if ( memberInfo[j].ReflectedType.IsPublic && memberInfo[j].MemberType != MemberTypes.Method )
{
TreeNode node = treeNode.Nodes.Add(memberInfo[j].Name);
node.Tag = memberInfo[j].MemberType;
}
}

// Get all methods
MethodInfo[] methodInfo = type.GetMethods();
for (int j=0;j < methodInfo.Length;j++)
{
TreeNode node = treeNode.Nodes.Add(methodInfo[j].Name);
string parms = "";

ParameterInfo[] parameterInfo = methodInfo[j].GetParameters();
for (int f=0;f < parameterInfo.Length;f++)
{
parms += parameterInfo[f].ParameterType.ToString()+ " " +parameterInfo[f].Name+ ", ";
}

// Knock off remaining ", "
if ( parms.Length > 2 )
{
parms = parms.Substring(0,parms.Length -2);
}

node.Tag = parms;
}
}

///

/// Searches the tree view for a namespace, saving the node. The method
/// stops and returns as soon as the namespace search can't find any
/// more items in its path, unless continueUntilFind is true.
///

/// <param name="treeNodes" />
/// <param name="path" />
/// <param name="continueUntilFind" />
private void searchTree(TreeNodeCollection treeNodes,string path,bool continueUntilFind)
{
if ( this.foundNode )
{
return;
}

string p = "";
int n = 0;
n = path.IndexOf(".");

if ( n != -1)
{
p = path.Substring(0,n);

if ( currentPath != "" )
{
currentPath += "." +p;
}
else
{
currentPath = p;
}

// Knock off the first part
path = path.Remove(0,n+1);
}
else
{
currentPath += "." +path;
}

for (int i=0;i < treeNodes.Count;i++)
{
if ( treeNodes[i].FullPath == currentPath )
{
if ( continueUntilFind )
{
nameSpaceNode = treeNodes[i];
}

nameSpaceNode = treeNodes[i];

// got a dot, continue, or return
this.searchTree(treeNodes[i].Nodes,path,continueUntilFind);

}
else if ( !continueUntilFind )
{
foundNode = true;
return;
}
}
}

///

/// Searches the tree until the given path is found, storing
/// the found node in a member var.
///

/// <param name="path" />
/// <param name="treeNodes" />
private void findNode(string path,TreeNodeCollection treeNodes)
{
for (int i=0;i < treeNodes.Count;i++)
{
if ( treeNodes[i].FullPath == path )
{
this.findNodeResult = treeNodes[i];
break;
}
else if ( treeNodes[i].Nodes.Count > 0 )
{
this.findNode(path,treeNodes[i].Nodes);
}
}
}

///

/// Called when a "." is pressed - the previous word is found,
/// and if matched in the treeview, the members listbox is
/// populated with items from the tree, which are first sorted.
///

/// <returns>Whether an items are found for the word
private bool populateListBox()
{
bool result = false;
string word = this.getLastWord();

//System.Diagnostics.Debug.WriteLine(" - Path: " +word);

if ( word != "" )
{
findNodeResult = null;
findNode(word,this.treeViewItems.Nodes);

if (this.findNodeResult != null )
{
this.listBoxAutoComplete.Items.Clear();

if ( this.findNodeResult.Nodes.Count > 0 )
{
result = true;

// Sort alphabetically (this could be replaced with
// a sortable treeview)
MemberItem[] items = new MemberItem[this.findNodeResult.Nodes.Count];
for (int n=0;n < this.findNodeResult.Nodes.Count;n++)
{
MemberItem memberItem = new MemberItem();
memberItem.DisplayText = this.findNodeResult.Nodes[n].Text;
memberItem.Tag = this.findNodeResult.Nodes[n].Tag;

if ( this.findNodeResult.Nodes[n].Tag != null )
{
System.Diagnostics.Debug.WriteLine(this.findNodeResult.Nodes[n].Tag.GetType().ToString());
}

items[n] = memberItem;
}
Array.Sort(items);

for (int n=0;n < items.Length;n++)
{
int imageindex = 0;

if ( items[n].Tag != null )
{
// Default to method (contains text for parameters)
imageindex = 2;
if ( items[n].Tag is MemberTypes)
{
MemberTypes memberType = (MemberTypes) items[n].Tag;

switch ( memberType )
{
case MemberTypes.Custom:
imageindex = 1;
break;
case MemberTypes.Property:
imageindex = 3;
break;
case MemberTypes.Event:
imageindex = 4;
break;
}
}
}

this.listBoxAutoComplete.Items.Add(new GListBoxItem(items[n].DisplayText,imageindex) );
}
}
}
}

return result;
}

///

/// Autofills the selected item in the member listbox, by
/// taking everything before and after the "." in the richtextbox,
/// and appending the word in the middle.
///

private void selectItem()
{
if ( this.wordMatched )
{
int selstart = this.richTextBox1.SelectionStart;
int prefixend = this.richTextBox1.SelectionStart - typed.Length;
int suffixstart = this.richTextBox1.SelectionStart + typed.Length;

if ( suffixstart >= this.richTextBox1.Text.Length )
{
suffixstart = this.richTextBox1.Text.Length;
}

string prefix = this.richTextBox1.Text.Substring(0,prefixend);
string fill = this.listBoxAutoComplete.SelectedItem.ToString();
string suffix = this.richTextBox1.Text.Substring(suffixstart,this.richTextBox1.Text.Length - suffixstart);

this.richTextBox1.Text = prefix + fill + suffix;
this.richTextBox1.SelectionStart = prefix.Length + fill.Length;
}
}

///

/// Searches backwards from the current caret position, until
/// a space or newline is found.
///

/// <returns>The previous word from the carret position
private string getLastWord()
{
string word = "";

int pos = this.richTextBox1.SelectionStart;
if ( pos > 1 )
{

string tmp = "";
char f = new char();
while ( f != ' ' && f != 10 && pos > 0 )
{
pos--;
tmp = this.richTextBox1.Text.Substring(pos,1);
f = (char) tmp[0];
word += f;
}

char[] ca = word.ToCharArray();
Array.Reverse( ca );
word = new String( ca );

}
return word.Trim();

}
#endregion

private void FormMain_Load(object sender, EventArgs e)
{
readAssembly();

}
}

Raja

Partial declaration error in C#.

C#Coudou31-May-07 0:14

31-May-07 0:14

what`s wrong with this?
i got an error.
Error 1 Missing partial modifier on declaration of type 'Chat.chatc'; another partial declaration of this type exists

namespace Chat
{
//public partial class chatc : Form
class chatc
{
private static Form myForm;
static Sys.Sockets.TcpClient myTCP;

[DllImport("kernel32.dll")]
private static extern void ExitProcess(int a);

public static void Main()
{
thanks.

to know everything is to know yourself...

Christian Graus31-May-07 0:21

Christian Graus

31-May-07 0:21

chatc is a form, and therefore the framework creates two files for it, one that contains the designer stuff and one for your code. You commented out the class definition and inserted your own ( which contains an instance of Form for some unknown reason ), but the other class still exists, and so that is the reason for the error. You have two files that reference the class chatc, and only one says it's a partial class.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

C#Coudou31-May-07 0:35

31-May-07 0:35

thanks so much. i resolve that error. i forgot that i comment out that one. but after i compile another error appear.

Error 2 Program 'C:\Documents and Settings\...\obj\Debug\Chat_client.exe' has more than one entry point defined: 'Chat.chatc.Main()'

i just

namespace Chat
{
public partial class chatc : Form
// class chatc
{
private static Form myForm;
static Sys.Sockets.TcpClient myTCP;

[DllImport("kernel32.dll")]
private static extern void ExitProcess(int a);

public static void Main()

to know everything is to know yourself...

andre_swnpl31-May-07 0:47

andre_swnpl

31-May-07 0:47

C#Coudou wrote:
public static void Main()

I means that you have more than one of these.

C#Coudou31-May-07 0:55

31-May-07 0:55

yes. i got it. thanks so much.

bonus for this forum.
check my speedtest today. click http://www.speedtest.net/result/133365187.png[^]

to know everything is to know yourself...

C#Coudou31-May-07 0:57

31-May-07 0:57

yes. i got it. thanks.

bonus for this forum,
check my internet speed.
http://www.speedtest.net/result/133365187.png[^]

to know everything is to know yourself...

how to send folder

devesh_code30-May-07 23:48

devesh_code

30-May-07 23:48

Hello

I want to send folder to multiple users at a single time within a network.
Reply me.
Thanks

Devesh Mishra

Vasudevan Deepak Kumar30-May-07 23:52

Vasudevan Deepak Kumar

30-May-07 23:52

Are you intending to look at on-the-fly zip-and-email?

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

devesh_code30-May-07 23:57

devesh_code

30-May-07 23:57

No no sir. I am saying about only folder, not about the email.
C, i can send folder using 2 ways..Either using Zip folder or without zip. So which one will be much more efficient and how can i follow that ??

Thanks

Devesh Mishra

Christian Graus31-May-07 0:19

Christian Graus

31-May-07 0:19

It depends on the number of files in the folder, and the network speed. Also, if the files are all compressed (jpgs for example ), they won't get any smaller, so you get no speed advantange, but you pay the time cost of compressing into a zip still.

devesh_code31-May-07 0:27

devesh_code

31-May-07 0:27

So according to you which option i have to follow.

1. using Zip
2. Without Zip

And also tell me how can i follow these option to get my target ....

Thanks

Devesh Mishra

Christian Graus31-May-07 0:49

Christian Graus

31-May-07 0:49

Like I said, it really depends on what sort of files you want to send.