在服务器端访问ajax post表单数据

时间:2014-10-30 08:01:19

标签: c# jquery ajax asp.net-mvc-4 post

我试图将一些数据与上传的文件一起发布。作为第一次,我试图传递我希望在服务器端检索的所有数据作为参数。即使我设法检索参数的值" Mode"正确。我从未收到参数" file"的值。我不知道为什么?

以下是我的代码:

控制器:

public ActionResult ReadFromExcel(HttpPostedFileBase file, bool Mode)
{
    // file is always null
    // Mode receives the correct values.
}

脚本:

$(document).ready(function () {
$("#ReadExcel").click(function () {

    var overwritefields = $("#overwritefields").is(":checked");


    $.ajax({
        type: "POST",
        url: 'ReadFromExcel',
        data: '{"file":"' + document.getElementById("FileUpload").files[0] + '","Mode":"' + overwritefields + '"}',
        dataType: 'json',
        contentType: 'application/json; charset=utf-8',
        processData: false,
        success: function (response) {
            // Refresh data

        },
        error: function (error) {
            alert("An error occured, Please contact System Administrator. \n" + "Error: " + error.statusText);
        },
        async: true
    });
});

然后我尝试通过Request.File [0]访问文件,这在某种程度上是成功的。但是如何检索其他表单数据的值,例如" Mode"?

以下是我的代码:

控制器:

public ActionResult ReadFromExcel()
{
    var file = Request.Files[0].
    // file contains the correct value.
    // Unable to retrieve mode value though.
}

脚本:

$(document).ready(function () {
$("#ReadExcel").click(function () {

    var formData = new FormData();
    formData.append("FileUpload", document.getElementById("FileUpload").files[0]);


    var overwritefields = $("#overwritefields").is(":checked");
    formData.append("Mode", overwritefields);


    $.ajax({
        type: "POST",
        url: 'ReadFromExcel',
        data: formData,
        dataType: 'json',
        contentType: 'application/json; charset=utf-8',
        processData: false,
        success: function (response) {
            // Refresh data

        },
        error: function (error) {
            alert("An error occured, Please contact System Administrator. \n" + "Error: " + error.statusText);
        },
        async: true
    });
});

以下是我的观点:

@model IPagedList<Budget>

@{
ViewBag.Title = "Import Budget Line Items From Excel";
var tooltip = new Dictionary<string, object>();
tooltip.Add("title", "Click to import budget line items from Excel");

int pageSize = 10;
string sortname = "ItemCode";
string sortorder = "asc";
string filter = "";
bool hasFilter = false;
if (Session["BudgetImportGridSettings"] != null)
{
    //
    // Get from cache the last page zise selected by the user.
    //
    Impetro.Models.Grid.GridSettings grid = (Impetro.Models.Grid.GridSettings)Session["BudgetImportGridSettings"];
    pageSize = grid.PageSize;
    sortname = grid.SortColumn;
    sortorder = grid.SortOrder;
    filter = grid.HasFilter ? grid.FilterString : "";
    hasFilter = grid.HasFilter && grid.Filter.rules.Count > 0;
}

}


<h2>@ViewBag.Title</h2>


<br style="clear: both;" />
<input type="file" id="FileUpload" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />
<span class="buttonspan backtolist" id="ReadExcel" title="Click to import budget line items from Excel"><a href="#" title="Click to import budget line items from Excel">Import</a></span>
<br style="clear: both;" />
<br style="clear: both;" />
<input type="checkbox" id="overwritefields" title="Overwrite other fields with imported non-blank data" class="chkclass" value=false />

<br style="clear: both;" />
<br style="clear: both;" />

@Html.Partial("_BudgetImportGrid")
<input type="hidden" value="@ViewBag.BudgetType" id="IntBudgetType" />

2 个答案:

答案 0 :(得分:1)

一种简单的方法就是将bool mode添加到操作方法中:

public ActionResult ReadFromExcel(bool Mode)
{
    //Use the selected Mode...

    var file = Request.Files[0].
    // file contains the correct value.
    // Unable to retrieve mode value though.
}

答案 1 :(得分:0)

我希望您可以使用HTML5文件阅读器API。以下解决方案使用它:

我已经从头开始构建您的方案,以确保我的建议有效。

要点:

  1. bool mode作为操作方法参数。它使用Query String提供给服务器。
  2. 作为二进制文件作为请求正文的一部分上传的文件。二进制数据是使用FileReader HTML5 API获得的。这是obly HTML5部分,如果你可以替换它,那么你可能会得到HTML5依赖。
  3. AJAX是一个POST请求!
  4. 使用以下JavaScript:

    $(function(){
        $("#upload").click(function () {
            var overwritefields = $("#overwritefields").is(":checked");
    
            var r = new FileReader();
            r.onload = function () {
                $.ajax({
                    type: "POST",
                    url: 'UploadFileWithBoolean?mode=' + overwritefields,
                    data: r.result,
                    contentType: 'application/octet-stream',
                    processData: false,
                    success: function (d) {
                        console.log("ok");
                        console.log(d);
                    },
                    error: function (d) {
                        console.log("fail");
                        console.log(d);
                    },
                    async: true
                });
            };
            r.readAsBinaryString(document.getElementById("FileUpload").files[0]);
        });
    });
    

    控制器方法:

    [HttpPost]
    public ActionResult UploadFileWithBoolean(bool mode)
    {
        //your file is now in Request.InputStream
        return Json(new { message = "mode is " + mode.ToString(), filesize = Request.InputStream.Length });
    }
    

    如果这有帮助,请告诉我。感谢