C＃超出内存异常 - 图像类型

Question

此代码的目的是从指定位置获取未知号码.JPG，并将其发送到“Microsoft Print to PDF”。在大约第5张.jpg图像之后，它会在Image img = imgs[index];处抛出“内存不足”异常。我该如何解决这个问题？

更新时间：2016-12-11 @ 9:00 PM （此问题已通过以下代码解决）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Printing;
using System.Diagnostics;
using System.Deployment.Application;


namespace CEB_Process
{
public partial class Form1 : Form 
{

    public Form1()
    {
        InitializeComponent();
    }




    //Texbox Input
    string Case_No;
    int index = 0;



   private static Image[] _imgs; 
    //==========================================================================================================
    //CONVERT PICTURES TO PDF Button Click
    //==========================================================================================================
    private void button2_Click(object sender, EventArgs e)
    {

        // set the directory to store the output.
        string newdirectory = string.Format(@"C:\{0}", Case_No);

        // generate a file name as the current date/time in unix timestamp format
        string newFileName = "5 x 7 in";

        try
        {

                // initialize PrinterDocument object
                PrintDocument pd = new PrintDocument()
                {

                    //Printer Settings
                    PrinterSettings = new PrinterSettings()
                    {
                        // set the printer to 'Microsoft Print to PDF'
                        PrinterName = "Microsoft Print to PDF",

                        // tell the object this document will print to file
                        PrintToFile = true,

                        // set the filename to whatever you like (full path)
                        PrintFileName = Path.Combine(newdirectory, newFileName + ".pdf"),

                    }//End Printer settings


                };//End PrintDocument()

            Page_Init(null, new EventArgs()); 
            pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
            pd.Print();

        }//End try 

        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }

    }//End Button Module   

    public static void Page_Init(object sender, EventArgs e)
    {
        if (!IsPostBack)
            BuildImageList(); 

    }


    //===========================================
    // Print Event Handler
    //===========================================
    private void pd_PrintPage(object sender, PrintPageEventArgs ev)
    {

        Graphics graphic = ev.Graphics;
        Point p = new Point(10, 10);
        Image img = _imgs[index];
        graphic.DrawImage(img, p);
        index++;
        ev.HasMorePages = index < _imgs.Length;
        img.Dispose();

    }


    //===============================================
    // Get Build the Image List
    //===============================================

    public static void BuildImageList()
    {
        string sdira = @"C:\test";
        _imgs = System.IO.Directory.GetFiles(sdira, "*.JPG").Select(f =>         Image.FromFile(f)).ToArray();
    }


 }//End Public Class

}//End Namespace

Answer 1

在您的代码中，您似乎在构建图像阵列的次数与您调用 Print_Page 的次数相同，这可能是您的问题所在。你只需要这样做一次。

让你的形象[] imgs;本地字段或属性，并且每个映像批次只调用 BuildImageList 一次（每页加载或您的环境）。

类似的东西：

private static Image[] _imgs;

//==========================================================================================================
    //CONVERT PICTURES TO PDF Button Click
    //==========================================================================================================
    private void button2_Click(object sender, EventArgs e)
    {

        // set the directory to store the output.
        string newdirectory = string.Format(@"C:\{0}", Case_No);

        // generate a file name as the current date/time in unix timestamp format
        string newFileName = "5 x 7 in";

        try
        {

                // initialize PrinterDocument object
                PrintDocument pd = new PrintDocument()
                {

                    //Printer Settings
                    PrinterSettings = new PrinterSettings()
                    {
                        // set the printer to 'Microsoft Print to PDF'
                        PrinterName = "Microsoft Print to PDF",

                        // tell the object this document will print to file
                        PrintToFile = true,

                        // set the filename to whatever you like (full path)
                        PrintFileName = Path.Combine(newdirectory, newFileName + ".pdf"),

                    }//End Printer settings


                };//End PrintDocument()


            pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);
            pd.Print();

        }//End try 

        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }

    }//End Button Module   


public static void Page_Init(object sender, EventArgs e)
{
  if(!IsPostBack)
     BuildImageList();

}


    //===========================================
    // Print Event Handler
    //===========================================
    private void pd_PrintPage(object sender, PrintPageEventArgs ev)
    {

        Graphics graphic = ev.Graphics;
        Point p = new Point(10, 10);
        Image img = _imgs[index];
        graphic.DrawImage(img, p);
        index++;
        ev.HasMorePages = index < _imgs.Length;
        img.Dispose();

    }


    //===============================================
    // Get Build the Image List
    //===============================================

    public static void BuildImageList()
    {
        String sdira = @"C:\test";
        _imgs = System.IO.Directory.GetFiles(sdira, "*.JPG").Select(f => Image.FromFile(f)).ToArray();
    }