CaptchaMvc Mvc5 | C# ASP.Net

 CaptchaMvc Mvc5 Using C# ASP.Net Visual Studio 2019

CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart". It is a test used to distinguish between humans and computers. CAPTCHAs are often used to prevent automated spam and abuse.

FormsAuthentication C# ASP.NET MVC

 

FormsAuthentication

FormsAuthentication class from System.Web.Security is used to authenticate a user whether login or not. FormsAuthentication class has many functions to check the user login and it's very easy to implement. Follow the code given below

Views

<h2>Login</h2>

<form method="post">

    <input type="text" name="UserName" placeholder="User Name"  required /><br /><br />

    <input type="password" name="Password" placeholder="Password" required /><br /><br />

    <input type="submit" value="Login" />

    @if (Request.QueryString["msg"] != null)

    {

        <br /><br />

        <span style="color:red">@Request.QueryString["msg"]</span>

    }

</form>

Make PDF from hyperlink | ASP.NET C#

 This post will help you to create a PDF file from a URL in ASP.Net C#. Follow the steps given below. We will save a PDF file on the server then after viewing the PDF file, the file will be deleted. 

Step 1 : 

Download Select.HtmlToPdf.NetCore package from NuGet. 

Goto Tools Menu>Nuget Package Manager > Manage Nuget Package for Solution

Step 2 : 

 

 Create a Button and call the javascript function, which will create a PDF file from the given URL. The passing argument is URL of the page. Which will be converted into PDF file on the server at the given path. Then you can download the file.

<input type="button" value="Get PDF" onclick="createPDF('https://girfa.co.in/')" />

Step 3 

Javascript Code

function createPDF(pageurl)
 {

         $.ajax({

                url: '/Common/htmltopdf/',
                async: true,
                dataType: "json",
                type: "GET",
                contentType: 'application/json; charset=utf-8',       

                data: { url: pageurl},

                success: function (data) {              

                    DelPDF('/upload/print/' + $.trim(invid) + '.pdf');                   

                    window.location.href = '/upload/print/' + $.trim(invid) + '.pdf';                          

                }

            });          

        }

 

function DelPDF(path) 
{          

            $.ajax({

                url: '/Common/DeleteCommonFile?path=' + path,

                type: "POST",

                contentType: false, // Not to set any content header

                processData: false, // Not to process data           

                 success: function (result) {

                    //Update Extension
                    if (result.sMessage == "1")
                    {   

                    }
                    else
                        alert(result.sMessage);

                },
                error: function (abc) {
                    alert(abc.statusText); 

                }

            });

}

Step 4

Controller C# code

public JsonResult htmltopdf(string url,string inv)

        {

            // instantiate a html to pdf converter object

            HtmlToPdf converter = new HtmlToPdf(); 

            // create a new pdf document converting an url
            PdfDocument doc = converter.ConvertUrl(url); 

            // save pdf document

            doc.Save(Server.MapPath("~/upload/print/" + inv + ".pdf")); 

            // close pdf document

            doc.Close();

            return Json(new { sMessage = "11"}, JsonRequestBehavior.AllowGet); 

        }

 

[HttpPost]

        public JsonResult DeleteCommonFile(string path)
        {

            try
            {

                string filename = Server.MapPath(path);
                if (System.IO.File.Exists(filename))
                {

                    System.IO.File.Delete(filename);

                } 

                return Json(new { sMessage = "1", JsonRequestBehavior.AllowGet });

            }

            catch (Exception ex)
            {

                return Json(new { sMessage = ex.Message, JsonRequestBehavior.AllowGet });

            }

        }

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Microsoft Access Read/Write on Plesk Windows Server C# ASP.NET

Microsoft Access database crud operations are mostly done by the ACE driver which works offline smoothly but when you run your application online especially on the windows server through Plesk. The ACE driver is not supported by the mostly windows server and MS Access is also not recommended for online applications. But in some circumstances, there is a need to run it online mostly, in the case of running an offline application online to enhance customer services. This post will help you that how can you run the MS Access application on a windows server using the Plesk server interface.  I will show you to connect your application using ODBC server and perform read/write operations in MS Access in the Windows Server Plesk server interface. 

Multiple Condition Entity framework toList Method | ASP.Net C# MVC

Hi, This post will show you, How to apply multiple or complicated condition with Entity framwork dbContext toList method using the where clause. If you are coming first time to this post, please read my post for Entity Framework Introduction. Example of this post-based Entity Framework Introduction.