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How to use RegularExpressionValidator to validate Image extension in Asp.Net

<asp:FileUpload ID="FUpImg1" runat="server" CssClass="control-label" />
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
ControlToValidate="FUpImg1" ValidationExpression="(.*?)\.(jpg|png|JPG|PNG)$"
CssClass="text-danger" ErrorMessage="Please Upload .jpg, .png only" Display="Dynamic"></asp:RegularExpressionValidator>
its not working its directly going on server side not validate my image extension. what is wrong with above code?
Thanks in advance!

RegularExpressionValidator only validate when i upload anything in the FileUploader!
that why its not validate anything when its null and going on server side in my question.
i use customvalidator with js function because i have 5 different FileUploader and i have to pass same function.
function validateImageExtension(source, args) {
var reg = /^(([a-zA-Z]:)|(\\{2}\w+)\$?)(\\(\w[\w].*))+(.jpg|.png|.jpeg)$/;
if (args.Value == "" || args.valueOf == null) {
args.IsValid = false;
source.innerText = "Image is Required*";
}
else {
//Checks with the control value.
if (reg.test(args.Value)) {
args.IsValid = true;
source.innerText = "";
}
else {
//If the condition not satisfied shows error message.
args.IsValid = false;
source.innerText = "Only .jpg, .png, .jpeg files are allowed!";
}
}
}
idk how it work btw. i just copy paste it from 5 different blogs.

Binding output from powershell script to gridview in asp.net c#

I'm very new to c# and I expect what I'm trying to do is quite simple-ish but I'm not able to find or follow other examples where output from a powershell array populates a gridview for further manipulation / execution of another script. The process on page load is to run a powershell script, which creates an array of session details which populate a gridview. A second script can then be initiated to interact wit that session (e.g. force a logoff) by way of selection of the gridview row.
Using other examples I have managed to initiate the first powershell execution, which throws the data to a form via:
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="PowerShellExecution.Default" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<div>
<h1>PowerShell Harness<asp:Label ID="Label1" runat="server" Text="Label" Visible="False"></asp:Label>
</h1>
<asp:TextBox ID="ResultBox" TextMode="MultiLine" Width="1000px" Height="400px" runat="server"></asp:TextBox>
</div>
</asp:Content>
CodeBehind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Management.Automation;
using System.Text;
namespace PowerShellExecution
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
// Gets the name if authenticated.
if (User.Identity.IsAuthenticated)
Label1.Text = User.Identity.Name;
else
Label1.Text = "No user identity available.";
// Clean the Result TextBox
ResultBox.Text = string.Empty;
// Initialize PowerShell engine
var shell = PowerShell.Create();
// Add the script to the PowerShell object
// shell.Commands.AddScript(Input.Text);
// shell.Commands.AddScript("D:\\Local_Scripts\\sessioncall.ps1");
shell.Commands.AddCommand("c:\\Local_Scripts\\sessioncall.ps1");
// Add Params
// shell.Commands.AddParameter(null,User.Identity.Name);
// shell.Commands.AddParameter("Username", Label1.Text);
shell.Commands.AddArgument(User.Identity.Name);
// Execute the script
var results = shell.Invoke();
// display results, with BaseObject converted to string
// Note : use |out-string for console-like output
if (results.Count > 0)
{
// We use a string builder ton create our result text
var builder = new StringBuilder();
foreach (var psObject in results)
{
// Convert the Base Object to a string and append it to the string builder.
// Add \r\n for line breaks
builder.Append(psObject.BaseObject.ToString() + "\r\n");
}
// Encode the string in HTML (prevent security issue with 'dangerous' caracters like < >
ResultBox.Text = Server.HtmlEncode(builder.ToString());
}
}
}
}
Sessioncall.ps1
$SessionUser = "$($args[0])"
set-brokersite -AdminAddress UKSite
$a = #(Get-BrokerSession -BrokeringUserName $SessionUser | Select-Object UserFullName, BrokeringTime, ClientName,DesktopGroupName, sessionstate, uid, machinename,#{Name='ENV';Expression={'UK'}})
#Pull US Sessions into array
Set-brokersite -AdminAddress USSite
$a += #(Get-BrokerSession -BrokeringUserName $SessionUser | Select-Object UserFullName, BrokeringTime, ClientName,DesktopGroupName, sessionstate, uid, machinename,#{Name='ENV';Expression={'US'}})
If ($a -ne $null){
Write-Output $a | out-string
}
Else {
Write-Output "No User session! Username was $SessionUser"
}
Currently the output is thrown to the textbox as an out-string. I'm struggling in even how to start to data-bind that array output as rows within a gridview. Just need a little hand-holding to get this started!
Thanks in advance!
Paul.

It's been a while since I've dabbled with WebForms, but I found a way to do what you're after...
First off, let's change your PowerShell script slightly. Rather than return a string (which is what | out-string is doing), we can simply return the objects. The shell.Invoke() method in the C# code knows how to extract fully-fledged objects from the output of the script so we don't need to serialize to a string inside the PowerShell script and then try to deserialize that again back to objects inside our C# code.
Ignoring your line-of-business logic for a minute, my script simply returns an array of PSCustomObjects and looks like this:
MyScript.ps1
write-output #(
(new-object PSCustomObject -Property ([ordered] #{
"MyProperty1" = "MyValue1.1"
"MyProperty2" = "MyValue2.1"
"MyProperty3" = "MyValue3.1"
})),
(new-object PSCustomObject -Property ([ordered] #{
"MyProperty1" = "MyValue1.2"
"MyProperty2" = "MyValue2.2"
"MyProperty3" = "MyValue3.2"
}))
);
Now, my C# Page_Load method does this:
Default.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
// Initialize PowerShell engine
var powershell = PowerShell.Create();
// Add the script to the PowerShell object
var script = "c:\\temp\\MyScript.ps1";
powershell.Commands.AddCommand(script);
// Execute the script
var results = powershell.Invoke();
...
and results contains a System.Collections.ObjectModel.Collection<PSObject>. We can't databind that directly to a GridView because the properties are tucked away inside key-value pairs in the Properties member of each PSObject, but if we create a new class it's pretty easy to extract the values into something we can databind:
MyClass.cs
public class MyClass
{
public string MyProperty1 { get; set; }
public string MyProperty2 { get; set; }
public string MyProperty3 { get; set; }
}
and our Page_Load can convert the PSObjects into instances of this class:
Default.aspx.cs
...
var objects = results.Select(
r => new MyClass
{
MyProperty1 = (string)r.Properties["MyProperty1"].Value,
MyProperty2 = (string)r.Properties["MyProperty2"].Value,
MyProperty3 = (string)r.Properties["MyProperty3"].Value,
}
);
this.ResultGrid.DataSource = objects;
this.ResultGrid.DataBind();
}
Then, to display the data you just need a GridView added to your Default.aspx with whatever columns and formatting you want defined:
Default.aspx
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
<asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server">
<div>
<h1>PowerShell Harness<asp:Label ID="Label1" runat="server" Text="Label" Visible="False"></asp:Label></h1>
<asp:GridView ID="ResultGrid" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="MyProperty1" HeaderText="My Property 1" />
<asp:BoundField DataField="MyProperty2" HeaderText="My Property 2" />
<asp:BoundField DataField="MyProperty3" HeaderText="My Property 3" />
</Columns>
</asp:GridView>
</div>
</asp:Content>
Run that and you should see something like this on the page:
Note
You might find your Get-BrokerSession cmdlet returns a collection of a specific type of object already rather than PSCustomObject, in which case you could possibly skip the conversion step and databind directly to the results object, so you might have to play with that to see. Hopefully the above will give you some pointers if there are any differences.
Hope this helps.

Many thanks for the guidance. Gridview now populates.
protected void Page_Load(object sender, EventArgs e)
{
// Gets the name if authenticated.
if (User.Identity.IsAuthenticated)
Label1.Text = User.Identity.Name;
else
Label1.Text = "No user identity available.";
// Clean the Result TextBox
// Initialize PowerShell engine
var shell = PowerShell.Create();
// Add the script to the PowerShell object
// shell.Commands.AddScript(Input.Text);
// shell.Commands.AddScript("D:\\Local_Scripts\\sessioncall.ps1");
shell.Commands.AddCommand("c:\\Local_Scripts\\sessioncall.ps1");
// Add Params
// shell.Commands.AddParameter(null,User.Identity.Name);
// shell.Commands.AddParameter("Username", Label1.Text);
shell.Commands.AddArgument(User.Identity.Name);
// Execute the script
var results = shell.Invoke();
// display results, with BaseObject converted to string
// Note : use |out-string for console-like output
if (results.Count > 0)
{
// We use a string builder ton create our result text
var results2 = shell.Invoke();
foreach (var psObject in results)
{
// Convert the Base Object to a string and append it to the string builder.
// Add \r\n for line breaks
var UserFullName = (psObject.Members["UserFullName"]);
var BrokeringTime = (psObject.Members["BrokeringTime"]);
var ClientName = (psObject.Members["ClientName"]);
var DesktopGroupName = (psObject.Members["DesktopGroupName"]);
var SessionState = (psObject.Members["SessionState"]);
var Uid = (psObject.Members["Uid"]);
var MachineName = (psObject.Members["MachineName"]);
var ENV = (psObject.Members["ENV"]);
// builder.Append(psObject.BaseObject.ToString() + "\r\n");
}
this.ResultGrid.DataSource = results2;
this.ResultGrid.DataBind();
}
}
Returns
[![enter image description here][1]][1]
However this method throws an exception error when you then define a datakeyname.
<asp:GridView ID="ResultGrid" runat="server" DataKeyNames="uid" AutoGenerateColumns="False" OnSelectedIndexChanged="ResultGrid_SelectedIndexChanged">
<Columns>
<asp:buttonfield buttontype="Button"
commandname="Select"
headertext="View"
text="View"/>
<asp:BoundField DataField="UserFullName" HeaderText="UserFullName" />
<asp:BoundField DataField="BrokeringTime" HeaderText="BrokeringTime" />
<asp:BoundField DataField="ClientName" HeaderText="ClientName" />
<asp:BoundField DataField="DesktopGroupName" HeaderText="DesktopGroupName" />
<asp:BoundField DataField="SessionState" HeaderText="SessionState" />
<asp:BoundField DataField="Uid" HeaderText="Uid" />
<asp:BoundField DataField="MachineName" HeaderText="MachineName" />
<asp:BoundField DataField="ENV" HeaderText="ENV" />
</Columns>
</asp:GridView>
code behind
protected void ResultGrid_SelectedIndexChanged(object sender, EventArgs e)
{
// Determine the RowIndex of the Row whose Button was clicked.
//int rowIndex = ((sender as Button).NamingContainer as GridViewRow).RowIndex;
String key = ResultGrid.SelectedDataKey.Value.ToString();
//Get the value of column from the DataKeys using the RowIndex.
//int id = Convert.ToInt32(ResultGrid.DataKeys[rowIndex].Values[01]);
// Response.Write("IM_RAA_657x_Date.aspx?Day=" + ResultGrid.SelectedDataKey.Value(0) + "&BusinessCategory=" + ResultGrid.SelectedDataKey.Values(1).ToString())
}
This throws an exception error at
this.ResultGrid.DataBind();
"System.Web.HttpException: 'DataBinding: 'System.Management.Automation.PSObject' does not contain a property with the name 'uid'.'"
I'm not clear if the method is now the issue or something outside of that. I'm confused as it must see inside PSObjects correctly in order for the variables to be defined and populate the gridview?! Hmm.
Wow; OK; I just realised this entire section is ignored! Case in point; it can be commented out! So clearly adjust the output from the powershell script!
foreach (var psObject in results)
{
// Convert the Base Object to a string and append it to the string builder.
// Add \r\n for line breaks
//var UserFullName = (psObject.Members["UserFullName"]);
//var BrokeringTime = (psObject.Members["BrokeringTime"]);
//var ClientName = (psObject.Members["ClientName"]);
//var DesktopGroupName = (psObject.Members["DesktopGroupName"]);
//var SessionState = (psObject.Members["SessionState"]);
//var Uid = (psObject.Members["Uid"]);
//var MachineName = (psObject.Members["MachineName"]);
//var ENV = (psObject.Members["ENV"]);
// builder.Append(psObject.BaseObject.ToString() + "\r\n");
}
Forgive me but I'm almost there!
r => new MyClass
{
UserFullName = (string)r.Properties["UserFullName"].Value,
BrokeringTime = (DateTime)r.Properties["BrokeringTime"].Value,
ClientName = (string)r.Properties["ClientName"].Value,
DesktopGroupName = (string)r.Properties["DesktopGroupName"].Value,
//SessionState = (string)r.Properties["SessionState"].Value,
Uid = (Int64)r.Properties["Uid"].Value,
//MachineName = (string)r.Properties["MachineName"].Value,
//ENV = (string)r.Properties["ENV"].Value,
}
);
this.ResultGrid.DataSource = objects;
this.ResultGrid.DataBind();
}
}
protected void ResultGrid_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Write(ResultGrid.SelectedValue.ToString());
}
}
internal class MyClass
{
public string UserFullName { get; set; }
public DateTime BrokeringTime { get; set; }
public string ClientName { get; set; }
public string DesktopGroupName { get; set; }
public String SessionState { get; set; }
public Int64 Uid { get; set; }
public string MachineName { get; set; }
public string ENV { get; set; }
}
So I'm now correctly populating the gridview; Some columns are still being problematic and are not being treated as strings BUT I'm almost there!
Looks like Get-member type:
BrokeringTime NoteProperty datetime BrokeringTime=28/02/2020 06:56:39
ClientName NoteProperty string ClientName=clientname
DesktopGroupName NoteProperty string DesktopGroupName=desktopgroupname
ENV NoteProperty System.String ENV=UK
MachineName NoteProperty string MachineName=machinename
SessionState NoteProperty SessionState SessionState=Active
Uid NoteProperty long Uid=12345678
UserFullName NoteProperty string UserFullName=username
C# Does seem to like system.string.

How to use multiple Regular expressions in ASP.NET Web Forms Regular Expression validator

I need to validate some control's input against multiple regular expressions how can i do this with one Regular Expression validator control.

There's no way. You need a regular expression validator for each regex you want to test.

Try to build a regular expression using the OR operator. Check this links for more information about it:
http://forums.asp.net/t/1213089.aspx?Multiple+Format+in+Regular+Expression+Validator
https://msdn.microsoft.com/en-us/library/aa976858(v=vs.71).aspx
If it's not possible to adapt and build a regular expression acording to your needs, you can use a custom validator and make all the validatations for each regular expression that you could need. Check this link for more information about Custom Validator.

I think the only solution to your problem is to use a custom validator.check the below code.this is just to give you an idea about how to use custom validator.
<asp:TextBox runat="server" ID="UserName" />
<asp:CustomValidator ID="CustomValidator1" runat="server"
ControlToValidate="UserName" ></asp:CustomValidator>
protected void ValidateUser(object source, ServerValidateEventArgs args)
{
Regex regx = new Regex("^[a-zA-Z0-9]{6,}$");
Regex regx2 = new Regex("^[a-zA-Z0-9]{6,}$");
if (regx.IsMatch(UserName.Text) == false)
{
CustomValidator1.ErrorMessage = "error message";
args.IsValid = false;
}
else if(regx2.IsMatch(UserName.Text) == false)
{
CustomValidator1.ErrorMessage = "second error message";
args.IsValid = false;
}
else
{args.IsValid = true;}
}

How to call confirm message from code behind in asp.net?

Hi I want to call a client side javascript confirm message from code behind in asp.net.
I want to use the true or false return value from the confirm message.
I'm doing like this, but this is not the correct way, please tell me how can I do the same.
ScriptManager.RegisterStartupScript(this, this.GetType(), "myconfirm", "confirm('No Rule Type Ids found for This Rule.');", true);

I think This is what you want to achieve:
<script type = "text/javascript">
function Confirm() {
var confirm_value = document.createElement("INPUT");
confirm_value.type = "hidden";
confirm_value.name = "confirm_value";
if (confirm("Do you want to save data?")) {
confirm_value.value = "Yes";
} else {
confirm_value.value = "No";
}
document.forms[0].appendChild(confirm_value);
}
</script>
.aspx code
<asp:Button ID="btnConfirm" runat="server" OnClick = "OnConfirm" Text = "Raise Confirm" OnClientClick = "Confirm()"/>
C#
public void OnConfirm(object sender, EventArgs e)
{
string confirmValue = Request.Form["confirm_value"];
if (confirmValue == "Yes")
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
}
else
{
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);
}
}

Instead of directly writing confirm in the code behind. Write the name of javascript function.
Forexample,
ScriptManager.RegisterStartupScript(this, this.GetType(), "myconfirm", "OpenConfirmDialog();", true);
In your javascript, write the function OpenConfirmDialog
<script>
function OpenConfirmDialog()
{
if (confirm('No Rule Type Ids found for This Rule.'))
{
//True .. do something
}
else
{
//False .. do something
}
}
</script>

You can't mix client-side code with server-side code. The client side code (javascript) will not be sent to the client (browser) until the server-side code has completed.
You will need to stop processing and show the question to the user (maybe by a redirect to some other page), and then (on confirm) continue with your processing.

Response.Write("<script language=javascript>");
Response.Write("if(confirm('El vehiculo no existe, Deseas crear el registro?')){window.location.href='IngresoVehiculos.aspx'}");
Response.Write("</script>");

use:
Response.Write("<script>alert('Open Message!');</script>");

You can do it without using Javascript function
Try
if (MessageBox.Show("confirm('No Rule Type Ids found for This Rule.')",
"myconfirm",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
// yes
}
else
{
//No
}

registerstartupscript blocking javascript character counter

i'm having issues with code that used to work, but now fails to run. I have a character counter on a textbox with the below code in the .aspx file:
<script>
var bName = navigator.appName;
function taLimit(taObj, maxL) {
if (taObj.value.length == maxL) return false;
return true;
}
function taCount(taObj, Cnt, maxL) {
objCnt = createObject(Cnt);
objVal = taObj.value;
if (objVal.length > maxL) objVal = objVal.substring(0, maxL);
if (objCnt) {
if (bName == "Netscape") {
objCnt.textContent = maxL - objVal.length;
}
else { objCnt.innerText = maxL - objVal.length; }
}
return true;
}
function createObject(objId) {
if (document.getElementById) return document.getElementById(objId);
else if (document.layers) return eval("document." + objId);
else if (document.all) return eval("document.all." + objId);
else return eval("document." + objId);
}
</script>
aspx:
<asp:TextBox ID="txtDescription" runat="server" Font-Names="Courier New"
TextMode="MultiLine" Width="398px" onKeyPress="return taLimit(this, 50)" onKeyUp="return taCount(this,'myCounter1', 50)"></asp:TextBox>
<br /><B><SPAN id='myCounter1'>50</SPAN></B>
This worked without problems before, but now i want a way to update the myCounter1 On page load, to show the correct remaining characters, i'm loading text from database into the textbox.
right now i'm using this:
ScriptManager.RegisterStartupScript(this, this.GetType(), "myscript", "document.getElementById('myCounter1').textContent = 50 - " + txtDescription.Text.Length.ToString() + ";", true);
This works, it sets the character counter to the correct remaining characters. Now the issue is however, when text is typed in the textbox, the caracter counter won't update anymore dynamically. Could someone tell me why?

Using js. Put this inside your script:
<script type="text/javascript">
window.onload = function(){
taCount(document.getElementById('<%=txtDescription.ClientID%>'),'myCounter1', 50);
}
</script>
Remove the Server side scriptmanager code.