方法一：UploadImage cetFU = new UploadImage();
if (cetFU.UpFile(FileUpload1, "teacher_picture"))//如果上传成功 第一个参数表示fileupload插件名称，第二表示文件夹的名称
{
ImageName = cetFU.FileName;
ImageType = ImageName.Substring(ImageName.IndexOf("."), ImageName.Length - ImageName.IndexOf("."));
}
else//如果上传失败
{
Response.Write(bc.MessageBox(cetFU.ErrMsg)); //弹出错误提示
}
能简单的就进行上传图片。
方法二：protected void btnupload_Click(object sender, System.EventArgs e)
{
string fullFileName = this.File1.PostedFile.FileName;
string fileName = fullFileName.Substring(fullFileName.LastIndexOf("\\") + 1);获取文件名
string type = fullFileName.Substring(fullFileName.LastIndexOf(".") + 1);获取文件类型
string time = this.dropyear.Text + this.droplist.Text;
if (fileName.Length > 20)
{
Response.Write("<script language='javascript'>alert('您上传的文件名必须在15个字符之内！');</script>");
}
else
{
if (type == "jpg" || type == "bmp" || type == "gif")
{
conn.Open();
string sql = "select * from kb where filepath='" + fileName + "'";
if (DB.ExecuteSqlEx(sql) == 1)//自己编写的类的方法，执行SQL语句
{
this.File1.PostedFile.SaveAs(Server.MapPath("upload") + "\\" + fileName);
sql = "insert into kb(filepath,kbtime) values('" + fileName + "','"+time+"')";
DB.ExecuteSql(sql);
this.Image1.ImageUrl = "upload/" + fileName;
this.Image1.Visible = true;
sql = "select count(*) from kb";
SqlCommand cmd = new SqlCommand(sql, conn);
this.lblNum.Text = cmd.ExecuteScalar().ToString();
Response.Write("<script language='javascript'>alert('上传成功，您可以继续上传其它图片！');</script>");
}
else
{
Response.Write("<script language='javascript'>alert('图片名已存在，请重命名后再上传！');</script>");
}
}
else
{
Response.Write("<script language='javascript'>alert('你选择的图片格式错误！');</script>");
}
}
}
相对比较清晰的说明了上传的过程。
删除文件 File.Delete(Server.MapPath("teacher_picture\\" + ImageName));//删除某个文件
