In ASP.NET For the security reasons that you wanted to encypt your password or sensitive data before storing it to the database and decypt after getting it from the database using ASP.NET C#.
Here is two simple method on how to encrypt and decrypt your password or data.
EXAMPLE:
Add System.Text namespace
Here is two simple method on how to encrypt and decrypt your password or data.
EXAMPLE:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table align="center">
<tr>
<td colspan="2">
<b>Encryption and Decryption of Password</b>
</td>
</tr>
<tr>
<td>
UserName
</td>
<td>
<asp:TextBox ID="txtname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
Password
</td>
<td>
<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox>
</td>
</tr>
<tr>
<td>
FirstName
</td>
<td>
<asp:TextBox ID="txtfname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
LastName
</td>
<td>
<asp:TextBox ID="txtlname" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:Button ID="btnSubmit" runat="server" Text="Submit"
onclick="btnSubmit_Click" />
</td>
</tr>
</table>
</div>
<div>
<table align="center">
<tr>
<td>
<b>Encryption of Password Details</b>
</td>
</tr>
<tr>
<td>
<asp:GridView ID="gvUsers" runat="server" CellPadding="4" BackColor="White"
BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px">
<RowStyle BackColor="White" ForeColor="#330099" />
<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
<PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC"
HorizontalAlign="Left"/>
</asp:GridView>
</td>
</tr>
</table>
</div>
<div>
<table align="center">
<tr>
<td>
<b>Decryption of Password Details</b>
</td>
</tr>
<tr>
<td>
<asp:GridView ID="gvdecryption" runat="server" BackColor="White"
BorderColor="#CC9966" BorderStyle="None" BorderWidth="1px" CellPadding="4"
onrowdatabound="gvdecryption_RowDataBound">
<RowStyle BackColor="White" ForeColor="#330099" />
<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
<PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="#663399" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
</asp:GridView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
private const string strconneciton = "Data
Source=MYCBJ017550027;Initial Catalog=MySamplesDB;Integrated
Security=True";
SqlConnection con = new SqlConnection(strconneciton);
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindencryptedData();
BindDecryptedData();
}
}
/// <summary>
/// btnSubmit event is used to insert user details with password
encryption
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
protected void btnSubmit_Click(object sender, EventArgs e)
{
string strpassword =
Encryptdata(txtPassword.Text);
con.Open();
SqlCommand cmd = new SqlCommand("insert into
SampleUserdetails(UserName,Password,FirstName,LastName) values('" + txtname.Text + "','" + strpassword + "','" + txtfname.Text + "','" + txtlname.Text + "')", con);
cmd.ExecuteNonQuery();
con.Close();
BindencryptedData();
BindDecryptedData();
}
/// <summary>
/// Bind user Details to gridview
/// </summary>
protected void BindencryptedData()
{
con.Open();
SqlCommand cmd = new SqlCommand("select * from SampleUserdetails", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
gvUsers.DataSource = ds;
gvUsers.DataBind();
con.Close();
}
/// <summary>
/// Bind user Details to gridview
/// </summary>
protected void BindDecryptedData()
{
con.Open();
SqlCommand cmd = new SqlCommand("select * from SampleUserdetails", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
gvdecryption.DataSource = ds;
gvdecryption.DataBind();
con.Close();
}
/// <summary>
/// Function is used to encrypt the password
/// </summary>
/// <param
name="password"></param>
/// <returns></returns>
private string Encryptdata(string password)
{
string strmsg = string.Empty;
byte[] encode = new byte[password.Length];
encode = Encoding.UTF8.GetBytes(password);
strmsg = Convert.ToBase64String(encode);
return strmsg;
}
/// <summary>
/// Function is used to Decrypt the password
/// </summary>
/// <param
name="password"></param>
/// <returns></returns>
private string Decryptdata(string encryptpwd)
{
string decryptpwd = string.Empty;
UTF8Encoding encodepwd = new UTF8Encoding();
Decoder Decode =
encodepwd.GetDecoder();
byte[] todecode_byte = Convert.FromBase64String(encryptpwd);
int charCount =
Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
Decode.GetChars(todecode_byte,
0, todecode_byte.Length, decoded_char, 0);
decryptpwd = new String(decoded_char);
return decryptpwd;
}
/// <summary>
/// rowdatabound condition is used to change the encrypted password
format to decryption format
/// </summary>
/// <param
name="sender"></param>
/// <param
name="e"></param>
protected void gvdecryption_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string decryptpassword =
e.Row.Cells[2].Text;
e.Row.Cells[2].Text =
Decryptdata(decryptpassword);
}
}
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