Textbox/Combobox question - C# Discussion Boards

max292971-Jul-08 16:23

1-Jul-08 16:23

I've uploaded my program through box.net, and i've sent it to two people, and they both say that it says "an error occured, and the program needs to close".

i've been giving it to them through this link: here.

is it working for you guys? i've told them to download this too, but they're still saying it's not working... what could be going on?

Re: Running your programs on other machines

Christian Graus1-Jul-08 16:24

Christian Graus

1-Jul-08 16:24

I assume they don't have the .NET framework installed.

Christian Graus

Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

Re: Running your programs on other machines

max292971-Jul-08 16:28

max29297

1-Jul-08 16:28

does it work on yours? and i've included in my question that i asked them to install the framework, and it gives the same message

I wish I could drive...

Re: Running your programs on other machines

Christian Graus1-Jul-08 16:37

Christian Graus

1-Jul-08 16:37

I didn't see a link, nor am I going to download and run a random program from the internet. Add some error logging code, and include a log at the top level, so that if no log is written, the program has not run at all ( so, no .NET, or wrong version of .NET )

Christian Graus

Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

Re: Running your programs on other machines

max292971-Jul-08 16:41

max29297

1-Jul-08 16:41

sorry, somehow the post sent before i added the link. i went back and added it. thanks for the logging tip, i'll try that. but man... i don't remember the people on these forms being so rude Frown | :(

I wish I could drive...

Re: Running your programs on other machines

Christian Graus1-Jul-08 17:24

Christian Graus

1-Jul-08 17:24

I'm not being rude, I'm being practical. I'm sure your code is not malicious, but it's not smart of me to bank on it. I am still trying to help you.

Christian Graus

Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

Re: Running your programs on other machines

max292971-Jul-08 17:31

max29297

1-Jul-08 17:31

i know, it just came off to me that way when i first read it. thanks for the help!

Textbox/Combobox question

JimWWhite1-Jul-08 14:26

JimWWhite

1-Jul-08 14:26

I'm coming from the VFP environment and I'm learning C# on the fly. In FoxPro we have a property setting on text and combo boxes that allow for 'SELECT UPON ENTRY' which causes the object's foreground and background colors to change when the object receives focus. Also, when the user presses any key other than a tab or enter key the object is cleared and it receives the first keystroke and they can continue to fill in the text portion of the object. If they press tab, enter, or complete the maximum number of chars for the field the object loses focus and the color reverts back to what it was before it got focus.

How can I do this in C#?

Many thanks!
Jim White

Re: Textbox/Combobox question

Anthony Mushrow1-Jul-08 14:48

Anthony Mushrow

1-Jul-08 14:48

The events Enter and Leave are for when the control gains/loses focus. So using those you could change the colours of your boxes.

You can use the event KeyDown to see what key the user has pressed before it's actuall passed to the text box so you can hadle your tab/enter keys there.

As for clearing the contents on the first key press, you'll just have to use a bool to check if its the first key press or not.

bool first = false;
OnEnter()
{
  //change colours
  first = true;
}
.
OnLeave()
{
  //change colours back
}
.
KeyDown(KeyEventArgs e)
{
  if(key is tab OR key is enter) {
    e.Handled = true;
    MyForm.Focus(); //should give the form focus, OnLeave event should fire
   }
.
  if(first)
    //clear data
.
  first = false;
}

My current favourite word is: I'm starting to run out of fav. words!

-SK Genius

Game Programming articles start -here[^]-

KeyEventArgs.SuppressKeyPress in C#

ArunJoseph 47163951-Jul-08 12:28

ArunJoseph 4716395

1-Jul-08 12:28

Is SuppressKeyPress property available in c# ?

i want to prevent user from entering any digits into a text field (anything other than digits are allowed)

so i gave the following code

void form1_KeyPress(object sender, KeyPressEventArgs e)
        {
            
           .
            
            if (char.IsDigit(e.KeyChar ))
            {
                //MessageBox.Show("its a number");
                
                 --i want to prevent user from entering any digit--
                
                
            }
            
        }

in VB there is a propery called SuppressKeyPress in KeyEventArgs. but its not there in C# . is there any other equivalent for SuppressKeyPress in C# ?

Re: KeyEventArgs.SuppressKeyPress in C#

User 66581-Jul-08 12:36

User 6658

1-Jul-08 12:36

e.Handled = char.IsDigit(e.KeyChar )

regards

modified 12-Sep-18 21:01pm.

Re: KeyEventArgs.SuppressKeyPress in C#

ArunJoseph 47163951-Jul-08 20:51

ArunJoseph 4716395

1-Jul-08 20:51

thanks a lot..

i have one more doubt.

i need a textbox where the user can enter only

Alphabets (A-Z and a-z)
Space
and also allow them to use backspace and delete keys.

this is the code i tried

if (!((e.KeyChar >= 'A' && (e.KeyChar <= 'Z') || ((e.KeyChar >= 'a') && (e.KeyChar <= 'z')))))
{

    e.Handled = true;


}

if (char.IsSeparator(e.KeyChar))
{
    e.Handled = false;
}

but the above code wont allows the user to use backspace

plz help me to set e.handled = false when the key pressed by the user is a backspace so that he can erase the last character entered

Re: KeyEventArgs.SuppressKeyPress in C#

N a v a n e e t h1-Jul-08 21:02

N a v a n e e t h

1-Jul-08 21:02

This worked for me

int keycode = e.KeyChar;
if (!((e.KeyChar >= 'A' && e.KeyChar <= 'Z') || (e.KeyChar >= 'a' && e.KeyChar <= 'z') || keycode == 8 || keycode == 32)) {
     e.Handled = true;
}

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Re: KeyEventArgs.SuppressKeyPress in C#

ArunJoseph 47163951-Jul-08 22:06

ArunJoseph 4716395

1-Jul-08 22:06

hey Navaneeth...

thanks a lot.. Big Grin | :-D

i solved my problem like this

if (!((e.KeyChar >= 'A' && (e.KeyChar <= 'Z') || ((e.KeyChar >= 'a') && (e.KeyChar <= 'z')))))
     {
           e.Handled = true;
     }
     if ((char.IsWhiteSpace(e.KeyChar)) || (e.KeyChar == (char)ConsoleKey.Backspace))
     {
         e.Handled = false;
     }

but your solution is the smarter way to handle it..

I am new to codeproject.com and people like you will make this a better place for people like me to find solutions to their problems!!!

cheers!! Wink | ;)

Arun

Re: KeyEventArgs.SuppressKeyPress in C#

Luc Pattyn1-Jul-08 14:23

Luc Pattyn

1-Jul-08 14:23

Hi,

two comments:

1. it is KeyEventArgs (as given by KeyDown and KeyUp) that holds a SuppressKeyPress property

2. all .NET classes are identical in C# and VB.NET, they are language-agnostic.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Voting for dummies? No thanks. Dead | X|

Re: KeyEventArgs.SuppressKeyPress in C#

ArunJoseph 47163951-Jul-08 20:57

ArunJoseph 4716395

1-Jul-08 20:57

I am doing this in VC# and the object of KeyEventArgs didnt show the SuppressKeyPress.
instead the keyhit can be handled by

kKeyEventArgs e
e.Handled = true;

thnanks to Greeg !! Poke tongue | ;-P

Nested Datalist Selection sometimes fails when large data or clicking to fast -- Guessing Timeout ?? Ideas??? Going Crazy!

Natalia_Uribe1-Jul-08 11:46

Natalia_Uribe

1-Jul-08 11:46

I have a user control that has 2 nested datalists. The second datalist requieres arguments from the first one to display the data. The main one shows the Product Categories and the second one shows the products for the selected category. When the user selects an item from the first I am calling "DataList_ItemCommand" which sets a session variable and then programatically binds the data for the second datalist. SOMETIMES (Mostly when the results are big or if I click to fast) I get an error on Internet Explorer which forces me to refresh the screen to see the data... Any ideas on what could be happening? Solutions?? Thanks Guys!

public void DataList_ItemCommand(Object sender, DataListCommandEventArgs e)
{
decimal nCpPk = (decimal)CategoryList.DataKeys[e.Item.ItemIndex];
Session["CategoryId"] = nCpPk;

BindData();
}

public void BindData()
{
//Dataset
DataSet DS = new DataSet();

//Create a connection to the SQL Server.
string strConnectionString = ConfigurationManager.ConnectionStrings["EckeMasterConnectionString"].ConnectionString;
SqlConnection conn = new SqlConnection(strConnectionString);

//Session Variables
decimal tmpCategoryId = (decimal)Session["CategoryId"];
decimal tmpMainCateg = (decimal)Session["MainCateg"];
string tmpShipWeek = (string)Session["ShipWeek"];
int tmpAvailableOnly = (int)Session["AvailableOnly"];
string tmpProdForm = (string)Session["ProdForm"];

//Create a DataAdapter, and then provide the name of the stored procedure.
SqlDataAdapter MyDataAdapter1 = new SqlDataAdapter("EWO_ProductsByCategory", conn);
MyDataAdapter1.SelectCommand.CommandType = CommandType.StoredProcedure;

SqlParameter ParCateg = new SqlParameter("@CategoryId", SqlDbType.Int);
ParCateg.Value = tmpCategoryId;
MyDataAdapter1.SelectCommand.Parameters.Add(ParCateg);

SqlParameter ParMainCateg = new SqlParameter("@MainCateg", SqlDbType.Int);
ParMainCateg.Value = tmpMainCateg;
MyDataAdapter1.SelectCommand.Parameters.Add(ParMainCateg);

SqlParameter ParProdForm = new SqlParameter("@ProdForm", SqlDbType.Int);
ParProdForm.Value = tmpProdForm;
MyDataAdapter1.SelectCommand.Parameters.Add(ParProdForm);

MyDataAdapter1.SelectCommand.CommandTimeout = int.MaxValue;
MyDataAdapter1.Fill(DS, "Products");

//'Create a DataAdapter, and then provide the name of the stored procedure.
SqlDataAdapter MyDataAdapter2 = new SqlDataAdapter("EWO_ProductDetail", conn);
MyDataAdapter2.SelectCommand.CommandType = CommandType.StoredProcedure;

SqlParameter ParCategA = new SqlParameter("@CategoryId", SqlDbType.Int);
ParCategA.Value = tmpCategoryId;
MyDataAdapter2.SelectCommand.Parameters.Add(ParCategA);

SqlParameter ParMainCategA = new SqlParameter("@MainCateg", SqlDbType.Int);
ParMainCategA.Value = tmpMainCateg;
MyDataAdapter2.SelectCommand.Parameters.Add(ParMainCategA);

SqlParameter ParShipWeekA = new SqlParameter("@ShipWeek", SqlDbType.DateTime);
ParShipWeekA.Value = tmpShipWeek;
MyDataAdapter2.SelectCommand.Parameters.Add(ParShipWeekA);

SqlParameter ParAvailOnlyA = new SqlParameter("@AvailableOnly", SqlDbType.Int);
ParAvailOnlyA.Value = tmpAvailableOnly;
MyDataAdapter2.SelectCommand.Parameters.Add(ParAvailOnlyA);

SqlParameter ParProdFormA = new SqlParameter("@ProdForm", SqlDbType.Int);
ParProdFormA.Value = tmpProdForm;
MyDataAdapter2.SelectCommand.Parameters.Add(ParProdFormA);

MyDataAdapter2.SelectCommand.CommandTimeout = int.MaxValue;
MyDataAdapter2.Fill(DS, "ProdForms");

DS.Relations.Add("MyRelation", DS.Tables["Products"].Columns["StockSiPk"], DS.Tables["ProdForms"].Columns["StockSiPk"]);

Products.DataSource = DS.Tables["Products"].DefaultView;
Products.DataBind();

for (int i = 200; i > 0; i--)
{
//Nothing here just waiting toprevent timeouts -- not sure if this is really working
}
}

Re: Nested Datalist Selection sometimes fails when large data or clicking to fast -- Guessing Timeout ?? Ideas??? Going Crazy!

Harvey Saayman1-Jul-08 22:39

Harvey Saayman

1-Jul-08 22:39

tip:

use PRE tags when posting code blocks, then someone might make an effort to actually read it...

Harvey Saayman - South Africa
Junior Developer
.Net, C#, SQL
you.suck = (you.passion != Programming)

How can we convert string to Brush ?

Mohammad Dayyan1-Jul-08 10:42

Mohammad Dayyan

1-Jul-08 10:42

Hi there.
I want to convert "Black" string to Brush.

For example something like this :

this.comboBoxColor.Background = (Brush)"Black";

How can we do it?
Can you help me ?

Freshman

Re: How can we convert string to Brush ?

User 66581-Jul-08 10:49

User 6658

1-Jul-08 10:49

This may work depending on the input string:

string colorName = "Black";
SolidBrush brush = new SolidBrush(Color.FromName(colorName));

You can find a list of available colors here[^].

regards

modified 12-Sep-18 21:01pm.

Re: How can we convert string to Brush ?

Mohammad Dayyan1-Jul-08 15:11

Mohammad Dayyan

1-Jul-08 15:11

Thanks Greeeg.
This code doesn't work in WPF.
I'm using WPF !

Freshman

Re: How can we convert string to Brush ?

Christian Graus1-Jul-08 15:55

Christian Graus

1-Jul-08 15:55

Well, he's given you the only possible answer. That's how you get a color from a string, you need to build whatever brush type you need from there.

Christian Graus

Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.

Re: How can we convert string to Brush ?

Bert delaVega1-Jul-08 18:23

Bert delaVega

1-Jul-08 18:23

Xaml?

Background="Black"

Re: How can we convert string to Brush ?

Bert delaVega1-Jul-08 18:43

Bert delaVega

1-Jul-08 18:43

I may have misread your question?

In code:

ComboBox comboBox1 = new ComboBox();

Brush backgroundBrush = Brushes.Black;

this.comboBox1.Background = backgroundBrush;

In Xaml:

comboBox1 background="Black"

How to place Assemblies or DLL's in a subfolder

earlgraham1-Jul-08 10:41

earlgraham

1-Jul-08 10:41

I would like our project DLL’s placed into a sub-folder(\plugins). But when I try to run the application, it can’t find them.

In the reference paths, I added a relative search path (.\plugins) and tried a micro path ($(TargetPath\plugins)). Neither seems to work. Unless the dll is in the same directory, I get an exception. The exceptions are the same. Can’t find file.

Thanks Cry | :((

Programmer
Glenn Earl Graham
Austin, TX

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