Is there any way to make a form for Admin to change his username and password stored in credential tag?

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I have used the credential tag in web.config file to authenticate my admin. now I want to know is there any way to make a page with a form for admin to change his username and password? this is my code in web.config:

XML

<system.web>
    <compilation debug="true" targetFramework="4.0" />
    <sessionState cookieless="AutoDetect" mode="InProc"  timeout="114400">
    </sessionState>
    <authentication mode="Forms">
        <forms timeout="1440" loginUrl="~/entrance_before_paying.aspx" defaultUrl="Admin/Default.aspx" name=".ASPXFORMSDEMO"  cookieless="AutoDetect" protection="All">
            <credentials passwordFormat="Clear">
                <user name="elmiragolshanff@yahoo.com"  password="elmira" />
            </credentials>
        </forms>
    </authentication>
</system.web>

I used this code in my sign in page to check if the user is admin or not:

C#

 private void enter()
     {
    if (FormsAuthentication.Authenticate(TextBox1.Text.Trim(), TextBox2.Text.Trim()))
    {
        FormsAuthentication.RedirectFromLoginPage("admin user name in credential tag", true);
    }
    else
    {
       // enter as a user}
    }
}

Posted 12-Feb-13 4:17am

elmirag

Updated 13-Feb-13 0:29am

v4

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Bandi Ramesh · Accepted Answer · 2013-02-12T04:56:00

ChangePassword.aspx

C#

<form ID="form1"  runat="server">
    <div>
        <asp:TextBox ID="txtUsername" runat="server">
        </asp:TextBox>
        <asp:TextBox ID="txtPassword" runat="server">
        </asp:TextBox>
        <asp:Button ID="btnWrite" runat="server" onclick="btnWrite_Click" Text="Modify" />
    </div>
</form>

ChangePassword.aspx.cs

C#

protected void btnWrite_Click(object sender, EventArgs e)
{
        Configuration webconfig = WebConfigurationManager.OpenWebConfiguration("~");
        SystemWebSectionGroup sysweb = (SystemWebSectionGroup)webconfig.GetSectionGroup("system.web");
        AuthenticationSection authSection = sysweb.Authentication;
        FormsAuthenticationUserCollection users = authSection.Forms.Credentials.Users;
        FormsAuthenticationUser user = users[0];
        user.Name = txtUsername.Text;
        user.Password = txtPassword.Text;
        webconfig.Save();
}

Note: Make sure to grant write permissions to web.config file and its parent folders otherwise you will get an exception "

System.InvalidOperationException: ConfigurationSection properties cannot be edited when locked