JQuery+ajax實現(xiàn)批量上傳圖片(自寫)_AJAX教程

<button id="SubUpload" class="ManagerButton" onClick="TSubmitUploadImageFile();return false;">確定上傳</button>
<button id="CancelUpload" class="ManagerButton" onClick="javascript：history.go(-1);">取消</button>
<button id="AddUpload" class="ManagerButton" onClick="TAddFileUpload();return false;">增加</button>
<tr><td class="tdClass">
圖片1：
</td><td class="tdClass">
<input name="" size="60" id="uploadImg1" type="file" />
<span id="uploadImgState1"></span>
</td></tr>

var TfileUploadNum=1; //記錄圖片選擇框個數(shù)
var Tnum=1; //ajax上傳圖片時索引
function TAddFileUpload()
{
var idnum = TfileUploadNum+1;
var str="<tr><td class='tdClass'>圖片"+idnum+"：</td>";
str += "<td class='tdClass'><input name='' size='60' id='uploadImg"+idnum+"' type='file' /><span id='uploadImgState"+idnum+"'>";
str += "</span></td></tr>";
("#imgTable").append(str);
TfileUploadNum += 1;
}

function TSubmitUploadImageFile()
{
M("SubUpload").disabled=true;
M("CancelUpload").disabled=true;
M("AddUpload").disabled=true;
setTimeout("TajaxFileUpload()",1000);//此為關(guān)鍵代碼
}

Random rd = new Random();
StringBuilder serial = new StringBuilder();
serial.Append(DateTime.Now.ToString("yyyyMMddHHmmssff"));
serial.Append(rd.Next(0, 999999).ToString());
return serial.ToString();

function TajaxFileUpload()
{
if(Tnum<TfileUploadNum+1)
{
//準(zhǔn)備提交處理
("#uploadImgState"+Tnum).html("<img src=../images/loading.gif />");
//開始提交
.ajax
({
type: "POST",
url:"http://localhost/ajaxText2/Handler1.ashx",
data:{upfile:("#uploadImg"+Tnum).val(),category:("#pcategory").val()},
success:function (data, status)
{
//alert(data);
var stringArray = data.split("|");

if(stringArray[0]=="1")
{
//stringArray[0] 成功狀態(tài)(1為成功，0為失敗)
//stringArray[1] 上傳成功的文件名
//stringArray[2] 消息提示
("#uploadImgState"+Tnum).html("<img src=../images/note_ok.gif />");//+stringArray[1]+"|"+stringArray[2]);
}
else
{
//上傳出錯
("#uploadImgState"+Tnum).html("<img src=../images/note_error.gif />"+stringArray[2]);//+stringArray[2]+"");
}
Tnum++;
setTimeout("TSubmitUploadImageFile()",0);
}
});
}
}

string _fileNamePath = "";
try
{
_fileNamePath = context.Request.Form["upfile"];
//開始上傳
string _savedFileResult = UpLoadFile(_fileNamePath);
context.Response.Write(_savedFileResult);
}
catch
{
context.Response.Write("0|error|上傳提交出錯");
}

//生成將要保存的隨機(jī)文件名
string fileName = GetFileName() + fileNameExt;
//物理完整路徑
string toFileFullPath = HttpContext.Current.Server.MapPath(toFilePath);
//檢查是否有該路徑 沒有就創(chuàng)建
if (!Directory.Exists(toFileFullPath))
{
Directory.CreateDirectory(toFileFullPath);
}
///創(chuàng)建WebClient實例
WebClient myWebClient = new WebClient();
//設(shè)定windows網(wǎng)絡(luò)安全認(rèn)證 方法1
myWebClient.Credentials = CredentialCache.DefaultCredentials;
//要上傳的文件
FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
//FileStream fs = OpenFile();
BinaryReader r = new BinaryReader(fs);
//使用UploadFile方法可以用下面的格式
//myWebClient.UploadFile(toFile, "PUT",fileNamePath);
byte[] postArray = r.ReadBytes((int)fs.Length);
Stream postStream = myWebClient.OpenWrite(toFile, "PUT");
if (postStream.CanWrite)
{
postStream.Write(postArray, 0, postArray.Length);
}

private bool CheckFileExt(string _fileExt)
{
string[] allowExt = new string[] { ".gif", ".jpg", ".jpeg" };
for (int i = 0; i < allowExt.Length; i++)
{
if (allowExt[i] == _fileExt) { return true; }
}
return false;
}

public static string GetFileName()
{
Random rd = new Random();
StringBuilder serial = new StringBuilder();
serial.Append(DateTime.Now.ToString("yyyyMMddHHmmssff"));
serial.Append(rd.Next(0, 999999).ToString());
return serial.ToString();
}