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POMVC4 Sending data from a text box in Controller to View using ActionLink and TempData
 

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    <p>Is there a way to utilize TempData with a ActionLink to pass data from a View to a Controller. I have a View that has client-side validation and I need to update a drop down list from a text box on the page without using a submit button. When using two submit type buttons the client side validation flags all the fields that have not been filled in. Essentially I want to be able to add a user defined category to the drop down list without having to jump to a different view for just a textbox and submit button. </p> <p>I was not sure if I could do something like this:</p> <pre><code>&lt;input type="text" name="NewCat" value="@TempData["newCat"]" placeholder="New Catagory"/&gt; </code></pre> <p>I couldn't quite get it to work though...</p> <p><strong>The View:</strong></p> <pre><code>@model Exercise4.Models.Quote @{ ViewBag.Title = "Create"; } &lt;h2&gt;Create New Quote&lt;/h2&gt; @using (Html.BeginForm()) { @Html.ValidationSummary(true) &lt;fieldset&gt; &lt;legend&gt;Quotation Creation&lt;/legend&gt; &lt;div class="editor-label"&gt; @Html.LabelFor(model =&gt; model.CatagoryID, "Catagory") &lt;/div&gt; &lt;div class="editor-field"&gt; @Html.DropDownList("CatagoryID", String.Empty) @Html.ValidationMessageFor(model =&gt; model.CatagoryID) &lt;/div&gt; &lt;aside&gt; @using (Html.BeginForm("NewCatagory","Quote")) { &lt;input type="text" name="NewCat" value="@TempData["newCat"]" placeholder="New Catagory"/&gt; @Html.ActionLink("Add Catagory","NewCatagory","Quote") } &lt;/aside&gt; &lt;div class="editor-label"&gt; @Html.LabelFor(model =&gt; model.QName) &lt;/div&gt; &lt;div class="editor-field"&gt; @Html.TextBoxFor(model =&gt; model.QName) @Html.ValidationMessageFor(model =&gt; model.QName) &lt;/div&gt; &lt;div class="editor-label"&gt; @Html.LabelFor(model =&gt; model.QAuthor) &lt;/div&gt; &lt;div class="editor-field"&gt; @Html.EditorFor(model =&gt; model.QAuthor) @Html.ValidationMessageFor(model =&gt; model.QAuthor) &lt;/div&gt; &lt;p&gt; &lt;input type="submit" value="Create" /&gt; &lt;/p&gt; &lt;/fieldset&gt; } &lt;div&gt; @Html.ActionLink("Back to List", "Index") &lt;/div&gt; @section Scripts { @Scripts.Render("~/bundles/jqueryval") } </code></pre> <p><strong>The Controller Section:</strong></p> <pre><code>// // Create New Catagory public ActionResult NewCatagory() { string value = TempData["newCat"] as string; if(!String.IsNullOrWhiteSpace(value)) { Catagory cat = new Catagory(); cat.CatName = value; db.Catagories.Add(cat); db.SaveChanges(); } ViewBag.CatagoryID = new SelectList(db.Catagories, "CatagoryID", "CatName"); return RedirectToAction("Create"); } </code></pre> <p>Any suggestions would be greatly appreciated either how to make this work or something a little more elegant.</p>
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