为什么只执行else语句？ - ASP.NET技术论坛

楼主

已结贴√ 问题点数：5 回复次数：7

为什么只执行else语句？

程序代码：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class FileUpload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        bool filesValib = false;
        if (this.FileUpload1.HasFile)
        {
            string fileExtension = (this.FileUpload1.FileName).ToLower();
            string[] restricExtension = { "gif", "jpg", "bmp", "png" };
            for (int i = 0; i < restricExtension.Length; i++)
            {
                if (fileExtension == restricExtension[i])
                {
                    filesValib = true;
                }
            }

            if (filesValib == true)
            {
                try
                {
                    this.Image1.ImageUrl = "../../WebSite7/Image/password.gif";
                    this.FileUpload1.SaveAs(Server.MapPath("~/images/") + FileUpload1.FileName);
                    this.Label1.Text = "文件上传成功";
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "源文件路径：" + this.FileUpload1.PostedFile.FileName;
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "文件大小：" + this.FileUpload1.PostedFile.ContentLength + "字节";
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "文件类型:" + this.FileUpload1.PostedFile.ContentType;
                }

                catch
                {
                    this.Label1.Text = "文件上传不成功！";
                }

                finally
                {

                }
            }
            else

            {
                this.Label1.Text = "只能够上传后缀名为jpg, gif, png, bmp的文件";
            }
        }
    }
}

选中图片格式的的文件点击上传还是直接跳到else语句求解释

第 2 楼

得分:3

string[] restricExtension = { "gif", "jpg", "bmp", "png" };
改为
string[] restricExtension = { ".gif", ".jpg", ".bmp", ".png" };

第 3 楼

得分:0

感谢

~~~~ 天道酬勤

第 4 楼

得分:0

程序代码：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class FileUpload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        bool filesValib = false;
        if (this.FileUpload1.HasFile)
        {
            string fileExtension = (this.FileUpload1.FileName).ToLower();
            string[] restricExtension = { ".gif", ".jpg", ".bmp", ".png" };
            for (int i = 0; i < restricExtension.Length; i++)
            {
                if (fileExtension == restricExtension[i])
                {
                    filesValib = true;
                }
            }

            if (filesValib == true)
            {
                try
                {
                    this.Image1.ImageUrl = "~/images/"+FileUpload1.FileName;
                    this.FileUpload1.SaveAs(Server.MapPath("~/images/") + FileUpload1.FileName);
                    this.Label1.Text = "文件上传成功";
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "源文件路径：" + this.FileUpload1.PostedFile.FileName;
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "文件大小：" + this.FileUpload1.PostedFile.ContentLength + "字节";
                    this.Label1.Text += "<br/>";
                    this.Label1.Text += "<li>" + "文件类型:" + this.FileUpload1.PostedFile.ContentType;
                }

                catch
                {
                    this.Label1.Text = "文件上传不成功！";
                }

                finally
                {

                }
            }
            else

            {
                this.Label1.Text = "只能够上传后缀名为jpg, gif, png, bmp的文件";
            }
        }
    }
}

现在把代码改好了，但是总是上传不成功，又不知道哪里错了？求教~~~~~~~~

~~~~ 天道酬勤

第 5 楼

得分:0

没有上传成功还是没有保存成功?有没有报什么错?

第 6 楼

得分:0

回复 5楼 shangsharon

没有报错，选中图片格式可是上传不成功

~~~~ 天道酬勤

第 7 楼

得分:0

能走到这一步吗?
this.FileUpload1.SaveAs(Server.MapPath("~/images/") + FileUpload1.FileName);

上传不成功是这个吗?
catch
{
this.Label1.Text = "文件上传不成功！";
}

第 8 楼

得分:3

你上传后，在你保存的路径下看是否有你上传的文件，如果没有的话，
把 catch
                {
                    this.Label1.Text = "文件上传不成功！";
                }

语句改成  catch (Exception ex)
                { this.Label1.Text = "文件上传不成功。"; }