【发布时间】：2017-03-04 22:33:02
【问题描述】：
我在同一页面上有两个文件输入元素。两者都允许多个文件上传。我正在使用 jquery ajax 和 asmx Web 服务来上传图像文件。由于某种原因，在使用第一个文件输入元素时文件上传没有任何错误，但在使用第二个输入元素时给出了最大长度超出错误。我正在使用大小不超过 4MB 的测试图像文件。这是第一个输入元素的 javascript 代码。
function addCrs(){
var nme = $("#crsName").val();
var stp = "carousel";
var upd = $("#crsAction option:selected").val();
var fileUpload = $("#FileUpload1").get(0);
var files = fileUpload.files;
var test = new FormData();
for (var i = 0; i < files.length; i++) {
var fsize = files[i].size;
var ftype = files[i].type;
var fname = files[i].name;
var fl = files.length;
if (fl == 0 || fsize > 3774873.6 || ftype != 'image/jpeg') {
$("label[for$=FileUpload1]").css("color", "Red");
} else {
$("label[for$=FileUpload1]").css("color", "#000000");
test.append(files[i].name, files[i]);
};
}
test.append("stype", stp);
test.append("rname", nme);
test.append("upd", upd);
$.ajax({
url: "pgCde.asmx/SaveFiles",
type: "POST",
enctype: 'multipart/form-data',
contentType: false,
processData: false,
cache: false,
dataType: "xml",
data: test,
success: function (result) {
$xml = $(result),
$str = $xml.find("string");
var str = $str.text();
if (str !== "This Carousel name already exists please type another name.") {
var n = str.split("_");
var crsl = Object();
crsl.crslName = $("#crsNameLst option:selected").val();
crsl.crslWidth = n[0];
crsl.crslHeight = n[1];
crsl.crslNumPhoto = n[2];
crsl.crslPage = $("#pgNameCrs option:selected").val();
var crsObj = { 'crsl': crsl };
$.ajax({
url: "pgCde.asmx/addCarousel",
type: "POST",
dataType: "json",
data: JSON.stringify(crsObj),
contentType: "application/json; charset=utf-8",
success: function (data) {
$("#crsConfirm").html(data.d);
},
error: function (e) {
$("#crsConfirm").html("Unavailable");
}
});
} else {
$("#crsConfirm").html(str);
}
},
error: function (err) {
$("#crsConfirm").html(err.statusText);
}
});
}
这是网络服务中的代码：
Public Function uploadImage(ByVal fCnt As Integer, ByVal cnt As Integer, ByVal reNme As String) As String
Dim rsp As String = ""
If Context.Request.Files.Count > 0 Then
Dim files As HttpFileCollection = Context.Request.Files
Dim cntStr As String = ""
cntStr = cnt.ToString
For i As Integer = 0 To files.Count - 1
cnt = cnt + 1
If cnt <= 9 Then
cntStr = "0" & cnt.ToString
ElseIf cnt >= 10 Then
cntStr = cnt.ToString
End If
Dim file As HttpPostedFile = files(i)
Dim fname As String
If HttpContext.Current.Request.Browser.Browser.ToUpper() = "IE" OrElse HttpContext.Current.Request.Browser.Browser.ToUpper() = "INTERNETEXPLORER" Then
Dim testfiles As String() = file.FileName.Split(New Char() {"\"c})
fname = testfiles(testfiles.Length - 1)
Else
fname = file.FileName
End If
Dim extF = file.ContentType
Dim flLngth = file.ContentLength
Dim fNme = fname.Split(".")
Dim flExt = fNme(fNme.Length - 1)
If flLngth <= 3774873.6 AndAlso extF = "image/jpeg" Then
Dim nwPath = Path.Combine(Context.Server.MapPath("../Content/images/"), reNme & "_" & cntStr & "." & flExt)
file.SaveAs(nwPath)
Dim bmp As New Bitmap(nwPath)
Dim wdth As String = bmp.Width.ToString()
Dim hgt As String = bmp.Height.ToString()
rsp = wdth & "_" & hgt & "_" & fCnt.ToString
bmp.Dispose()
Else
rsp &= "Only jpeg files less than 3.6MB allowed."
End If
Next
End If
Return rsp
End Function
<WebMethod()>
Public Function SaveFiles() As String
Dim rsp As String = ""
Dim fCnt As Integer = Context.Request.Files.Count
Dim reNme As String = Regex.Replace(Context.Request.Form("rname"), "\W", "_")
Dim updt As String = Context.Request.Form("upd")
Dim stp As String = Context.Request.Form("stype")
Dim cnt As Integer = 0
Dim thlm As New thalMem2DataContext
If updt = "Add" Then
If stp = "slideshow" Then
Dim sEx = (From s In thlm.Slideshow_Infos Where s.sldName = reNme Select s).Count()
If sEx = 0 Then
rsp &= uploadImage(fCnt, cnt, reNme)
Else
rsp &= "This SlideShow name already exists please type another name."
End If
ElseIf stp = "carousel" Then
Dim cEx = (From c In thlm.Carousel_Infos Where c.Carousel_Name = reNme Select c).Count()
If cEx = 0 Then
rsp &= uploadImage(fCnt, cnt, reNme)
Else
rsp &= "This Carousel name already exists please type another name."
End If
End If
ElseIf updt = "Update" Then
Dim numP As Integer
If stp = "slideshow" Then
numP = (From n In thlm.Slideshow_Infos Where n.sldName = reNme Select n.numSlides).Single
ElseIf stp = "carousel" Then
numP = (From n In thlm.Carousel_Infos Where n.Carousel_Name = reNme Select n.Num_Photos).Single
End If
Dim fAdd As Integer = fCnt + numP
rsp &= uploadImage(fAdd, numP, reNme)
End If
Return rsp
End Function
此代码用于两个文件输入元素。
这是第二个文件输入元素的 javascript 代码：
function addSld() {
var nme = $("#sldName").val();
var stp = "slideshow";
var upd = $("#sldAction option:selected").val();
var fileUpload = $("#FileUpload2").get(0);
var files = fileUpload.files;
var test = new FormData();
for (var i = 0; i < files.length; i++) {
var fsize = files[i].size;
var ftype = files[i].type;
var fname = files[i].name;
var fl = files.length;
if (fl == 0 || fsize > 3774873.6 || ftype != 'image/jpeg') {
$("label[for$=FileUpload2]").css("color", "Red");
} else {
$("label[for$=FileUpload2]").css("color", "#000000");
test.append(files[i].name, files[i]);
}
}
test.append("stype", stp);
test.append("rname", nme);
test.append("upd", upd);
$.ajax({
url: "pgCde.asmx/SaveFiles",
type: "POST",
enctype: 'multipart/form-data',
contentType: false,
processData: false,
cache: false,
dataType: "xml",
data: test,
success: function (result) {
$xml = $(result),
$str = $xml.find("string");
var str = $str.text();
if (str !== "This SlideShow name already exists please type another name.") {
var n = str.split("_");
var slide = Object();
slide.sldName = $.trim($("#sldName").val());
slide.sldOrient = $("#sldOrient option:selected").val();
slide.sldWidth = n[0];
slide.sldHeight = n[1];
slide.sldNumPhoto = n[2];
slide.sldPage = $("#pgNameSld option:selected").val();
var sldObj = { 'slide': slide };
$.ajax({
url: "pgCde.asmx/addSlideShw",
type: "POST",
dataType: "json",
data: JSON.stringify(sldObj),
contentType: "application/json; charset=utf-8",
success: function (data) {
$("#sldConfirm").html(data.d);
},
error: function (e) {
$("#sldConfirm").html("Unavailable");
}
});
} else {
$("#sldConfirm").html(str);
}
},
error: function (err) {
$("#sldConfirm").html(err.statusText);
}
});
}
这是错误：
System.Web.HttpException：超出最大请求长度。
在 System.Web.HttpRequest.GetEntireRawContent()
在 System.Web.HttpRequest.GetMultipartContent()
在 System.Web.HttpRequest.FillInFilesCollection()
在 System.Web.HttpRequest.EnsureFiles()
在 System.Web.HttpRequest.get_Files()
在 C:\Users\suzher\Documents\My Web Sites\mySite\App_Code\pgCde 中的 pgCde.SaveFiles() .vb:第 684 行
第 684 行指向 web 服务中的这行代码：
Dim fCnt As Integer = Context.Request.Files.Count
【问题讨论】：
标签： jquery asp.net ajax vb.net