jave script key code

When we use keyboard keys in your JavaScript function then the following codes will be useful to write condition statement in your function.

For Example:

We have one textbox and button for login for that you type your username in textbox then instead of clicking Login button if you click on enter key in your keyboard then it has to be login.

For  that the following function will work in onkeypress event.

The enter key value is 13.

<input type="text" id="txtSearch" onkeypress="searchKeyPress(event);" />
    <input type="button" id="btnSearch" Value="Search" onclick="anyfunction();" />

    <script>
    function searchKeyPress(e)
    {

        if (typeof e == 'undefined' && window.event) { e = window.event; }
        if (e.keyCode == 13)
        {
            document.getElementById('btnSearch').click();
        }
    }
    </script>

The following are Java script   Key Codes for Keyboard Characters :

backspace	8
tab	9
enter	13
shift	16
ctrl	17
alt	18
pause/break	19
caps lock	20
escape	27
page up	33
page down	34
end	35
home	36
left arrow	37
up arrow	38
right arrow	39
down arrow	40
insert	45
delete	46
0	48
1	49
2	50
3	51
4	52
5	53
6	54
7	55
8	56
9	57
a	65
b	66
c	67
d	68
e	69
f	70
g	71
h	72
i	73
j	74
k	75
l	76
m	77
n	78
o	79
p	80
q	81
r	82
s	83
T	84
U	85
V	86
W	87
X	88
y	89
z	90
Left window key	91
Right window key	92
Select key	93
numpad 0	96
numpad 1	97
numpad 2	98
numpad 3	99
numpad 4	100
numpad 5	101
numpad 6	102
numpad 7	103
numpad 8	104
numpad 9	105
multiply	106
add	107
subtract	109
decimal point	110
divide	111
f1	112
f2	113
f3	114
f4	115
f5	116
f6	117
f7	118
f8	119
f9	120
f10	121
f11	122
f12	123
num lock	144
scroll lock	145
semi-colon	186
equal sign	187
comma	188
dash	189
period	190
forward slash	191
grave accent	192
open bracket	219
back slash	220
close braket	221
single quote	222

xml data insert update

This article is shows about insert data into XML file instead of using SqlServer database.

For that first Design your form as per your requirements.

In this am adding daily expenses of a person for that am taking fields as Date,  Amount, Purpose, Source  Bank and one Save button like below:

For accessing XML file add the following namespace in top of your code:

                         using System.Xml;

Write the following code in your Save button Click:

private void btnsave_Click(object sender, EventArgs e)

        {

            string path = "Expences.xml";

            XmlDocument doc = new XmlDocument();

            //If there is no current file, then create a new one

            if (!System.IO.File.Exists(path))

            {

                //Create neccessary nodes

                XmlDeclaration declaration = doc.CreateXmlDeclaration("1.0", "UTF-8", "yes");

                XmlComment comment = doc.CreateComment("This is an XML Generated File");

                doc.AppendChild(declaration);

                doc.AppendChild(comment);

            }

            else //If there is already a file

            {

                //    //Load the XML File

                doc.Load(path);

            }

            //Get the root element

            XmlElement root = doc.DocumentElement;

            XmlElement Subroot = doc.CreateElement("Expences");

            XmlElement Date = doc.CreateElement("Date");

            XmlElement Amount = doc.CreateElement("Amount");

            XmlElement Purpose = doc.CreateElement("purpose");

            XmlElement Source = doc.CreateElement("Source");

            XmlElement Bank = doc.CreateElement("Bank");

            //Add the values for each nodes

            Date.InnerText = Convert.ToDateTime(dateTimePicker1.Text).ToShortDateString();

            Amount.InnerText = txtAmount.Text;

            Purpose.InnerText = txtPurpose.Text;

            if (radioButton1.Checked)

            {

                Source.InnerText = "Cash";

                Bank.InnerText = " ";

            }

            else

            {

                Source.InnerText = "Bank";

                Bank.InnerText = comboBox1.SelectedItem.ToString();

            }

           

            Subroot.AppendChild(Date);

            Subroot.AppendChild(Amount);

            Subroot.AppendChild(Purpose);

            Subroot.AppendChild(Source);

            Subroot.AppendChild(Bank);

            root.AppendChild(Subroot);

            doc.AppendChild(root);

            //Save the document

            doc.Save(path);

            //Show confirmation message

            MessageBox.Show("Details  added Successfully");

            //Reset text fields for new input

            txtPurpose.Text = String.Empty;

            txtAmount.Text = String.Empty;

        }

       

      Then run your application and see output like below:

To see your saving data in XML file do the following steps:

Select your solution from Solution Explorer

Right click and Select Open Folder in Windows Explorer

Then your application folder will open in that double click on bin folder  then double click debug folder

Then you will see your Expenses XML document file à double click on it then you will see your Saving Data in your browser like below:

Retrieve data from XML file and show in DataGridview :

For showing these saving data into DataGridview, am taking one Show button and DataGridview Control in the form:

Write the following code in show button click:

     private void btnShow_Click(object sender, EventArgs e)

        {

                XmlReader xmlFile;

                xmlFile = XmlReader.Create("Expences.xml", new XmlReaderSettings());

                DataSet ds = new DataSet();

                ds.ReadXml(xmlFile);

                dataGridView1.DataSource = ds.Tables[0];

            }

Then you will see your data binding to DataGridview like below: