C# - Load partial view with parameters

In ASP.NET MVC or ASP.NET Core, you can load a partial view with parameters in several ways. Here's how you can pass parameters to a partial view in different scenarios:

1. Passing Parameters in ASP.NET MVC

Using ViewData

You can pass parameters to a partial view using ViewData or ViewBag.

Example:

Controller:

public ActionResult Index() { ViewData["Message"] = "Hello, World!"; return View(); } 

Main View (Index.cshtml):

@Html.Partial("_PartialView") 

Partial View (_PartialView.cshtml):

<p>@ViewData["Message"]</p> 

Using Strongly Typed Models

You can pass a model to the partial view, which provides a strongly typed way to handle parameters.

Controller:

public ActionResult Index() { var model = new MyModel { Message = "Hello, World!" }; return View(model); } 

Main View (Index.cshtml):

@Html.Partial("_PartialView", Model) 

Partial View (_PartialView.cshtml):

@model MyModel <p>@Model.Message</p> 

Model:

public class MyModel { public string Message { get; set; } } 

2. Passing Parameters in ASP.NET Core

Using ViewData or ViewBag

Similar to ASP.NET MVC, you can use ViewData or ViewBag.

Controller:

public IActionResult Index() { ViewData["Message"] = "Hello, World!"; return View(); } 

Main View (Index.cshtml):

@await Html.PartialAsync("_PartialView") 

Partial View (_PartialView.cshtml):

<p>@ViewData["Message"]</p> 

Using Strongly Typed Models

You can also use strongly typed models.

Controller:

public IActionResult Index() { var model = new MyModel { Message = "Hello, World!" }; return View(model); } 

Main View (Index.cshtml):

@await Html.PartialAsync("_PartialView", Model) 

Partial View (_PartialView.cshtml):

@model MyModel <p>@Model.Message</p> 

Model:

public class MyModel { public string Message { get; set; } } 

3. Using RenderPartial and PartialAsync

In ASP.NET Core, you can use PartialAsync to render partial views asynchronously.

Controller:

public IActionResult Index() { var model = new MyModel { Message = "Hello, World!" }; return View(model); } 

Main View (Index.cshtml):

@await Html.PartialAsync("_PartialView", Model) 

Partial View (_PartialView.cshtml):

@model MyModel <p>@Model.Message</p> 

4. Using AJAX to Load Partial Views

If you want to load a partial view dynamically using AJAX and pass parameters, you can do so with JavaScript and jQuery.

Controller:

public IActionResult PartialView(string message) { var model = new MyModel { Message = message }; return PartialView("_PartialView", model); } 

Main View (Index.cshtml):

<div id="partialViewContainer"></div> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <script> $(document).ready(function () { $.ajax({ url: '@Url.Action("PartialView")', type: 'GET', data: { message: 'Hello from AJAX!' }, success: function (data) { $('#partialViewContainer').html(data); } }); }); </script> 

Partial View (_PartialView.cshtml):

@model MyModel <p>@Model.Message</p> 

Summary

• Using ViewData/ViewBag: Quick and simple, but less type-safe.
• Strongly Typed Models: Provides a type-safe way to pass parameters.
• Async Partial Rendering: Suitable for asynchronous operations in ASP.NET Core.
• AJAX: Dynamically load partial views with parameters.

Choose the method that best fits your scenario based on how and when you need to pass parameters to the partial view.

Examples

1. C# MVC Load Partial View with Parameters via AJAX

   Description: Demonstrates how to load a partial view with parameters using AJAX in an ASP.NET MVC application.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView(int id) { var model = GetDataById(id); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'GET', data: { id: 1 }, success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

2. C# MVC Render Partial View with Model

   Description: Shows how to render a partial view with a model in an ASP.NET MVC application.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { var model = GetModel(); return View(model); } public PartialViewResult LoadPartialView(YourModel model) { return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @model YourModel @Html.Partial("_PartialViewName", Model) // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

3. C# MVC Load Partial View with Parameters on Button Click

   Description: Demonstrates how to load a partial view with parameters on a button click in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView(string param) { var model = GetDataByParam(param); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { var param = $('#paramInput').val(); $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'GET', data: { param: param }, success: function (data) { $('#partialContainer').html(data); } }); } </script> } <input type="text" id="paramInput" /> <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

4. C# MVC Load Partial View with List Parameter

   Description: Shows how to load a partial view with a list parameter in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView(List<int> ids) { var model = GetDataByIds(ids); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { var ids = [1, 2, 3]; // Example list $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'POST', data: JSON.stringify(ids), contentType: 'application/json; charset=utf-8', success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model List<YourModel> <div> @foreach (var item in Model) { <div>@Html.DisplayFor(m => item.YourProperty)</div> } </div> 

5. C# MVC Load Partial View with Complex Object

   Description: Illustrates how to load a partial view with a complex object in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView(ComplexObject obj) { var model = GetDataByComplexObject(obj); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { var obj = { Property1: "Value1", Property2: "Value2" }; // Example object $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'POST', data: JSON.stringify(obj), contentType: 'application/json; charset=utf-8', success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

6. C# MVC Load Partial View with ViewBag Parameter

   Description: Demonstrates how to load a partial view with a parameter passed via ViewBag in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView() { ViewBag.Message = "Hello from ViewBag!"; return PartialView("_PartialViewName"); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'GET', success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) <div> <p>@ViewBag.Message</p> </div> 

7. C# MVC Load Partial View with TempData Parameter

   Description: Shows how to load a partial view with a parameter passed via TempData in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { TempData["Message"] = "Hello from TempData!"; return View(); } public PartialViewResult LoadPartialView() { return PartialView("_PartialViewName"); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'GET', success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) <div> <p>@TempData["Message"]</p> </div> 

8. C# MVC Load Partial View with Route Parameters

   Description: Illustrates how to load a partial view with route parameters in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public PartialViewResult LoadPartialView(int id) { var model = GetDataById(id); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { var id = 1; // Example id $.ajax({ url: '@Url.Action("LoadPartialView", "Home", new { id = 1 })', type: 'GET', success: function (data) { $('#partialContainer').html(data); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

9. C# MVC Load Partial View with Form Data

   Description: Shows how to load a partial view with form data in ASP.NET MVC.

   Code:

   // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } [HttpPost] public PartialViewResult LoadPartialView(FormCollection form) { string param = form["param"]; var model = GetDataByParam(param); // Your method to get data return PartialView("_PartialViewName", model); } } // View (Index.cshtml) @using (Html.BeginForm("LoadPartialView", "Home", FormMethod.Post, new { id = "myForm" })) { <input type="text" name="param" /> <button type="submit">Load Partial View</button> } <div id="partialContainer"></div> @section scripts { <script> $('#myForm').submit(function (e) { e.preventDefault(); $.ajax({ url: '@Url.Action("LoadPartialView", "Home")', type: 'POST', data: $(this).serialize(), success: function (data) { $('#partialContainer').html(data); } }); }); </script> } // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

10. C# MVC Load Partial View with JsonResult

    Description: Demonstrates how to load a partial view with a JsonResult in ASP.NET MVC.

    Code:

    // Controller public class HomeController : Controller { public ActionResult Index() { return View(); } public JsonResult LoadPartialViewJson(int id) { var model = GetDataById(id); // Your method to get data var html = RenderPartialViewToString("_PartialViewName", model); return Json(new { html }, JsonRequestBehavior.AllowGet); } private string RenderPartialViewToString(string viewName, object model) { ViewData.Model = model; using (var sw = new StringWriter()) { var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName); var viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw); viewResult.View.Render(viewContext, sw); return sw.GetStringBuilder().ToString(); } } } // View (Index.cshtml) @section scripts { <script> function loadPartial() { var id = 1; // Example id $.ajax({ url: '@Url.Action("LoadPartialViewJson", "Home")', type: 'GET', data: { id: id }, success: function (data) { $('#partialContainer').html(data.html); } }); } </script> } <button onclick="loadPartial()">Load Partial View</button> <div id="partialContainer"></div> // Partial View (_PartialViewName.cshtml) @model YourModel <div> @Html.DisplayFor(m => m.YourProperty) </div> 

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