Re: Int to string - C# Discussion Boards

1-May-06 21:35

i use this code.. but it's not working.
i use visual C# 2005.
in my selection string there are 3 parameters (:PARAM3)
this is just one sampje
the error is :

The best overloaded method match for 'string.this[int]' has some invalid arguments

so i have to put it to string somewhere.. but i don't know how and where
can anyone help me?

if (textBox2.Text == string.Empty)<br />
           {<br />
               dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString[":PARAM3"] = "%";<br />
           }<br />
           else<br />
           {<br />
               dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString[":PARAM3"].Value = textBox2.Text;<br />
           }

WillemM1-May-06 22:21

WillemM

1-May-06 22:21

Int32 x = 10;<br />
String text = x.ToString();

As simple as that Smile | :)

WM.

What about weapons of mass-construction?

Rmokkenstorm1-May-06 22:25

1-May-06 22:25

but where should i put this..
my value of my param2 is given while running the application.
this actually i did know.
but how to implent it in my application is the question Big Grin | :-D

J4amieC1-May-06 23:22

J4amieC

1-May-06 23:22

COnnection.ConnectionString returns a string according to the documentation[^]. So trying to use a string-indexer will fail. The error message says:

The best overloaded method match for 'string.this[int]' has some invalid arguments

which is to say you can use a numeric-indexer on a string variable, to retrieve the character at that index.

string myString = "HelloWorld"
char firstChar = myString[0];

firstChar would contain the letter 'H'

You should tell us what you are trying to achieve, rather than how you are trying to achieve it - that way maybe someone can give you more help.

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Guffa1-May-06 23:25

Guffa

1-May-06 23:25

On what line do you get the error?

You are using the Value property on only one of them. Shouldn't be on both?

---
b { font-weight: normal; }

Rmokkenstorm1-May-06 23:38

1-May-06 23:38

both line's give the error
what i'm trying to achieve is the following

i've got one datagrid, 3 textboxes and a button
in the textboxes you can fill in a value wich should be param2, param3, param4.
on this values he will search my database.
select * From Table where (Column like :PARAM2).

if there's no value he fills in a wildcard.
if i don't do that he's got a empty parameter so he won't be able to select something.

the button fill's the database with the parameters.
en show's the data in the datagrid.

that's the idee.

i'de had it working on visual studio 2003.net
also with c# and using a Oracle database
now visual C# 2005 and a acces database.

so once the code did work.

hopefully this make some sense

Josh Smith2-May-06 1:43

Josh Smith

2-May-06 1:43

The ConnectionString property returns a string. You cannot index into a string with a string value...

// Bad
dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString[":PARAM3"] = "%";

As the compiler error told you, you have to index into the string with an integer (a whole number).

// Better
dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString[4] = '%';

Most likely what you are trying to achieve is something like this:

// Best
string val;
if( textBox2.Text != string.Empty ) 
   val = textBox2.Text;
else
   val = "%";

dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString = dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString.Replace( ":PARAM3", val );

Josh

Rmokkenstorm2-May-06 2:43

2-May-06 2:43

in the last case he doesn't give my param the value of "val"

Josh Smith2-May-06 4:21

Josh Smith

2-May-06 4:21

Who is 'he'?

Rmokkenstorm2-May-06 4:34

assigning Values to a resized string Array

2-May-06 4:34

he is my program
this is the code i use now

<codeval;
if( textbox2.text="" !="string.Empty" )=""
val="textBox2.Text;
else" "%";dbanbm_t075_borgtochttableadapter.connection.connectionstring="dBANBM_T075_BORGTOCHTTableAdapter.Connection.ConnectionString.Replace(" ":param3",="" val="" );<="" code="">

the "val" get's his value form the program. that is the % if the field is empty. or else the value that is typed in the textfield.

but the parameter doesn't get this value

abhinish1-May-06 20:50

abhinish

1-May-06 20:50

Hi guys!

need some Help ..

i m trying ti assign values to a resized string array without loosing its old values..
something like this:

string[] myArr=new string[]{"abhinav","gupta"};

Array.Resize(ref myArr, myArr.length+10}

this code increases the length of array
but how to assign the value of the new added Dimensions..without loosing the old values:

i dont want to use :

myArr[3]="some Text";

as the array is dynamic .. and i have to assign more than 50 values in different situations..

is there some other way to asign the values to new increased Dimensions...

abhinav

Re: assigning Values to a resized string Array

akyriako781-May-06 21:01

akyriako78

1-May-06 21:01

Use an ArrayList or if you use 2.0 the equivelant is List<String>

graphics

cshivaprasad1-May-06 20:42

1-May-06 20:42

I am doing a project on binary trees, I need to show very large tree structure graphically on screen, How can make it in c#?

shiva

CWIZO1-May-06 21:14

1-May-06 21:14

Well the easiest way would be with a TreeView control.
You can look at my ThreeTree program to see how you can add nodes to the TreeView control.

Or ware you thinking on drawing the tree yourself?

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cshivaprasad1-May-06 21:19

1-May-06 21:19

Hi, Thanks 4 reply
Yes, I am thinking of drawing tree it self, as it shown in text books.
I hope i can do it with GDI+,..But not sure.

-- modified at 3:23 Tuesday 2nd May, 2006

CWIZO1-May-06 21:23

1-May-06 21:23

You can doo it with GDI+. I was trying to do draw my tree about a week ago, but then I decided to use the TreeView control.
Drawing a tree seems very complex, as nodes would quickly overlap...

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Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!

cshivaprasad1-May-06 21:32

1-May-06 21:32

Hi,

Can U please send me some sort of rough code, so i may modify and make it.
It may help me.
Thank U.

Shiva

CWIZO1-May-06 21:35

1-May-06 21:35

Code that does what?

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Q:What does the derived class in C# tell to it's parent?
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cshivaprasad1-May-06 23:41

1-May-06 23:41

Which draw the tree

CWIZO1-May-06 23:45

1-May-06 23:45

I think you missunderstood me. I didn't write a program that would manually draw the tree, I just used the TreeView control.

--------------------------------------------------------
My portfolio & development blog
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!

cshivaprasad2-May-06 0:08