C# webform 在新页面打开时就加载本地图片
//第一个例子
protected void Page_Load(object sender, EventArgs e) { // 文件路径 string path = "/images/head.png"; // 文件名 string filename = "head.png"; // 输出的是图片 Response.ContentType = "image/png"; // 添加头信息,为"文件下载/另存为"对话框指定默认文件名 Response.AddHeader("Content-Disposition", "filename=" + HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(filename))); Response.WriteFile(path); Response.End(); }
//第二个例子
protected void Page_Load(object sender, EventArgs e) { try { string fileName = Request["ReInspectDoc"]; string strSql = "SELECT fpath FROM AOI_Feedstock_Add_Record WHERE InspectionOrderNumber =#[STRING] "; DataTable dt = DBCenter.GetDataTable(strSql, fileName); if (string.IsNullOrWhiteSpace(dt.Rows[0][0].ToString().Trim())) { throw new Exception("该单号没有对应的图片"); } string prctureName = dt.Rows[0][0].ToString().Replace("/", "\\"); picturePath = Server.MapPath(".") + "\\" + prctureName; // 输出的是图片 Response.ContentType = prctureName; // 添加头信息,为"文件下载/另存为"对话框指定默认文件名 Response.AddHeader("Content-Disposition", "filename=" + HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(prctureName))); Response.WriteFile(picturePath); // Response.End(); HttpContext.Current.ApplicationInstance.CompleteRequest(); } catch (Exception ex) { throw new Exception(ex.ToString()+"该单号没有对应的图片"); } }