读取文件夹中的所有图片文件
问题描述：
我第一次读取的时候没有问题。在删除图片后再读取图片会读取错误，以下是我的代码各位帮忙看一下。
后台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data;
public partial class admin_netshopper_DHweihu_makepage_addhuandeng : System.Web.UI.UserControl
{
public string SlideFolderPath = myConfig.webimgshijiurl + "/kuaigou/huandeng/";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
if (!System.IO.Directory.Exists(SlideFolderPath))
{
System.IO.Directory.CreateDirectory(SlideFolderPath);
}
bind();
}
}
public void bind()
{
string Images = "";
string[] Dir = System.IO.Directory.GetFiles(SlideFolderPath);
foreach (string file in Dir)
{
System.IO.FileInfo FI = new System.IO.FileInfo(file);
if (FI.Extension == ".jpg")
{
string name = FI.Name.Substring(0, FI.Name.Length - 4);// 获取文件名
string URL = myConfig.webimgurl + "/kuaigou/huandeng/" + FI.Name;// 组装图片路径
Images += URL + "," + name + ",";
}
}
DataTable table = new DataTable();// 创建一个表
table.Columns.Add("URL");// 创建字段
table.Columns.Add("id");
string str = Images;
if (str.Length > 0)
{
str = str.Substring(0, str.Length - 1);
}
string[] ss = str.Split(',');
DataRow row = table.NewRow();
for (int i = 0; i < ss.Length; i++)// 为表插入数据
{
if (i % 2 == 0) row = table.NewRow();
row[i % 2] = ss[i];
if ((i + 1) % 2 == 0) table.Rows.Add(row);
}
LblNumber.Text = table.Rows.Count.ToString();
if (table.Rows.Count > 0)
{
GV.DataSource = table;
GV.DataBind();
divNumber.Style.Add("display", "block");
}
else
{
GV.DataSource = null;
GV.DataBind();
divNumber.Style.Add("display", "none");
}
if (GV.Rows.Count == 1)
{
Button BtnDelete = (Button)GV.Rows[0].Cells[1].FindControl("BtnDelete");
BtnDelete.Enabled = false;
}
}
protected void BtnDtal_Click(object sender, EventArgs e)
{
int Number = 0;
string[] Dir = System.IO.Directory.GetFiles(SlideFolderPath);
foreach (string file in Dir)
{
System.IO.FileInfo FI = new System.IO.FileInfo(file);
if (FI.Extension == ".jpg")// 统计一共有多少个后缀为*.jpg的图片文件
{
Number++;
}
}
if (FUDtal.PostedFile.FileName == "")
{
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn14", "<script>alert('请选择图片');</script>");
return;
}
if (Number == 0)
{
Number = 1;
}
else if (Number > 0)
{
Number = Number + 1;
}
string name = FUDtal.PostedFile.FileName;//获取文件名称
int index = name.LastIndexOf(".");
string lastName = name.Substring(index, name.Length - index);//文件后缀
string Newname = Number.ToString() + lastName;//文件名
// || lastName == ".bmp" || lastName == ".gif" || lastName == ".png"
if (lastName == ".jpg")
{
System.Drawing.Image image = System.Drawing.Image.FromStream(FUDtal.PostedFile.InputStream);
int height = image.Height;
int width = image.Width;
if (height == 481 && width == 1920)
{
string path = SlideFolderPath + Newname;
FUDtal.PostedFile.SaveAs(path);//保存到服务器上
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn2", "<script>alert('图片上传成功');</script>");
bind();
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn12", "<script>alert('图片尺寸错误');</script>");
return;
}
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn17", "<script>alert('图片后缀错误！');</script>");
return;
}
}
protected void BtnDelete_Click(object sender, EventArgs e)
{
int row = ((GridViewRow)((Button)sender).NamingContainer).RowIndex;
HiddenField HFid = (HiddenField)GV.Rows[row].Cells[0].FindControl("HFid");
string Route = SlideFolderPath + HFid.Value + ".jpg";
FileInfo file = new FileInfo(Route);//指定文件路径
if (file.Exists)//判断文件是否存在
{
file.Attributes = FileAttributes.Normal;//将文件属性设置为普通,比方说只读文件设置为普通
file.Delete();//删除文件
if (file.Exists == false)
{
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn3", "<script>alert('图片删除成功');</script>");
bindReset();
bind();
}
else
{
Page.ClientScript.RegisterStartupScript(GetType(), "rsnn16", "<script>alert('图片删除失败');</script>");
return;
}
}
}
public void bindReset()// 重新命名图片
{
string Images = "";
string[] Dir = System.IO.Directory.GetFiles(SlideFolderPath);
foreach (string file in Dir)
{
System.IO.FileInfo FI = new System.IO.FileInfo(file);
if (FI.Extension == ".jpg")
{
string name = FI.Name.Substring(0, FI.Name.Length - 4);// 获取文件名
Images += name + ",";
}
}
DataTable table = new DataTable();// 创建一个表
table.Columns.Add("id");// 创建字段
string str = Images;
if (str.Length > 0)
{
str = str.Substring(0, str.Length - 1);
}
string[] ss = str.Split(',');
DataRow row = table.NewRow();
for (int i = 0; i < ss.Length; i++)// 为表插入数据
{
if (i % 1 == 0) row = table.NewRow();
row[i % 1] = ss[i];
if ((i + 1) % 1 == 0) table.Rows.Add(row);
}
for (int i = 0; i < table.Rows.Count; i++)
{
string id = table.Rows[i]["id"].ToString();
string srcFileName = SlideFolderPath + id + ".jpg";
string destFileName = SlideFolderPath + (i + 1) + ".jpg";
if (System.IO.File.Exists(srcFileName))
{
System.IO.File.Move(srcFileName, destFileName);// 重新命名图片
}
}
}
}
前台代码
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="addhuandeng.ascx.cs" Inherits="admin_netshopper_DHweihu_makepage_addhuandeng" %>
<div style="width: 1024px; -moz-box-shadow: 0px 0px 10px #BFBFBF; -webkit-box-shadow: 0px 0px 10px #BFBFBF;
box-shadow: 0px 0px 10px #BFBFBF; padding: 20px 5px; margin: 50px auto">
<div style="width: 98%; margin-left: auto; margin-right: auto;">
<asp:FileUpload ID="FUDtal" runat="server" />
<asp:Button ID="BtnDtal" runat="server" Text="上传" Height="30px" OnClick="BtnDtal_Click" />
后缀: *.jpg（注：图片格式为宽：1920px、高：481px）
</div>
<div style="width: 98%; margin: 20px auto 0px auto;">
<div id="divNumber" runat="server" style="width: 100%; text-align: left; display: block;
margin-bottom: 5px;">
当前共有<asp:Label ID="LblNumber" runat="server"></asp:Label>张图片
</div>
<asp:GridView ID="GV" runat="server" Width="100%" CellPadding="4" ForeColor="#333333"
GridLines="None" AutoGenerateColumns="False">
<Columns>
<asp:TemplateField HeaderText="图片">
<ItemTemplate>
<asp:Image ID="Images" runat="server" Width="900px" ImageUrl='<%# Eval("URL") %>' />
<asp:HiddenField ID="HFid" runat="server" Value='<%# Eval("id") %>' />
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center" />
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="操作">
<ItemTemplate>
<asp:Button ID="BtnDelete" runat="server" Text="删除" Width="40px" Height="30px" OnClick="BtnDelete_Click" />
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center" />
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
</Columns>
<AlternatingRowStyle BackColor="White" />
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>
</div>
</div>
答
你在BtnDelete_Click事件中，删除成功后调用了bindReset()后又调用bind()，这其中会不会有冲突？
答
// //读取assets文件夹的图片
private Bitmap getBit(String filename){
BitmapFactory.Options options = new BitmapFactory.Options();
// options.inSampleSize = 2;//图片宽高都为原来的二分之一，即图片为原来的四分之......
答案就在这里：读取assets文件夹中的图片
----------------------你好，人类，我是来自CSDN星球的问答机器人小C，以上是依据我对问题的理解给出的答案，如果解决了你的问题，望采纳。