about array search

jkjsha ahsa

i'm student and i start studing c# last year

i want to make windows application program

the program will be :

                                i have array contain the following values {"a",""a1,"b","b1","c","c1"}

                                i want to make textbox to search in the array if the user enter the frist string of element all the element which start of this character like google search

and like this pic

please send me a message

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18 Replies

Know the answer? Post it — somebody with the same question will find it here.

Kirtan Patel17y ago
Accepted answer
foreach(var str in array)
{
col.Add(str);

}

Equavalent for loop Coding

for(int i=0;i<=array.length -1 ;i++)
{

col.Add(array[i]);

}

var is new datatype in C# 3.0 that can accept any datatype variable and make itself to like that variable datatype ( Like Object Datatype)

Here Col is Collection of String that you want to Show in AutoComplete Words List

add

Col.Add(str) will add one of the string of your array to that collection :)

if my answer helped you please mark "do you like this answer" please :)
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Kirtan Patel17y ago
you are welcome dear :)
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jkjsha ahsa17y ago
ok thank u for every thing

i'm very grateful to you

nice day
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Kirtan Patel17y ago
Hi, Friend ,

its not compulsory to write code under

form()
{

}

you can also write code In Form_Load() event of the form

or in button's Click Event

here Need is that Code that make the AutoComplete Setup Once

as you can not Use TextChanged Event because TextChange event fires every time you enter character into TextBox .

and will bind the Autocomplete List that many time That is totally wrong so that can use text_changed event :-)

and when you Bind AutoComplete Source With The TextBox the procedures after that is done automatically you dont

have to manually code in text_changed event :-)

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jkjsha ahsa17y ago
excellent !!
i under stand every word you write
i have another question

why we write this code under public form()

and not under

private void textBox1_TextChanged(object sender, EventArgs e)

i try to write the code under

private void textBox1_TextChanged(object sender, EventArgs e)

and its run some wrong way
0
jkjsha ahsa17y ago
and can we use for instead of foreach
0

jkjsha ahsa17y ago

in this part

 foreach (var str in strArr)
            {
                col.Add(str);
            }

statement 

col.add(str);

what it mean

Kirtan Patel17y ago
foreach is used to iterate through each item in collection

like we have array

string[] array = { "a", "a1", "b", "b1", "c", "c1" };

now if we want to iterate through each string in array we can use foreach

we can also use for loop to do so but for using for loop we need to know how much time the loop has to be run

in foreach we dont need to know that thing

noe lets see the code how to iterate through above show array

foreach ( string str in array)
{
// Suppose We want to add each string that is in array to listbox one by one
ListBox1.Items.Add(str);
}

That will do job efficiently.

Here in your code for AutoComplete no need to use it as we can directly add whole array in collection by AddRange()
as i shown in My above Post :-)

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jkjsha ahsa17y ago
please i want to know some information about this foreach u use
0
jinge17y ago
Looking MSDN document for more information:
http://msdn.microsoft.com/en-us/library/system.windows.forms.textbox.autocompletesource.aspx
0
jinge17y ago
The TextBox provides a way to implement this specific feature for you.
AutoCompleteCustomSource property: this property is used to specify the source of the TextBox. For example, the array. But you can't simply use array directly. Since this it only accepts AutoCompleteStringCollection object. So as you see, I instatiate a new object of this type, and add the data in the array to it.
AutoCompleteMode has for enumration value:
None: does not prompt the user with dropdown, or autocomplete the word.
Suggest: only display the dropdown list, but not auto complete the word.
Append: only auto complete the word, but not show the dropdown list.
SuggestAppend: the combination of suggest and Append behavior.
You also need to specify AutoCompleteSource to CustomSource since we provide the data from the array.

If you have anything not understand, let me know.
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jkjsha ahsa17y ago
mr jinge please put some comments to be understandable code as i'm a starter
or put link to article about this feature in c#
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jinge17y ago
If you found the post helps you, please accept it as answer.
Thank you.
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jkjsha ahsa17y ago
i love you man very good answer
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jinge17y ago
post a bit late
0

jinge17y ago

In Windows Form application, it's very easy. Please use the following code:

   public Form1()
        {
            InitializeComponent();
            string[] strArr = new string[] { "abc", "cde", "afd", "asdf" };
            textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
            AutoCompleteStringCollection col = new AutoCompleteStringCollection();
            foreach (var str in strArr)
            {
                col.Add(str);
            }
            textBox1.AutoCompleteCustomSource = col;
            textBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
        }

Don't forget to accept this post as answer if it solves your problem.

jkjsha ahsa17y ago
thank u very much u are great
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Kirtan Patel17y ago
Hi friend,

Here is Code How to do that

don't forget to mark "do you like this answer " please it will give me credits :)

private void Form1_Load(object sender, EventArgs e)
        {


            string[] array = { "a", "a1", "b", "b1", "c", "c1" };

         //Create AutoComplete Collection
            AutoCompleteStringCollection collection = new AutoCompleteStringCollection();

           //Add Array Values to that Collection
            collection.AddRange(array);

         // Set TextBox Properties
            textBox1.AutoCompleteMode = AutoCompleteMode.Suggest;
            textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
            textBox1.AutoCompleteCustomSource = collection;
        }
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