C# 从SQL Server 2008向PictureBox加载图像失败_C#_.net_Winforms_Visual Studio 2010_Sql Server 2008

C# 从SQL Server 2008向PictureBox加载图像失败

c# .net winforms visual-studio-2010 sql-server-2008

C# 从SQL Server 2008向PictureBox加载图像失败,c#,.net,winforms,visual-studio-2010,sql-server-2008,C#,.net,Winforms,Visual Studio 2010,Sql Server 2008,我无法从SQL Server 2008数据库读取图像并将其加载到Windows窗体PictureBox。以下是从DB检索图像的代码： //UI Button Binded Code private void LoadImage_Click(object sender, RoutedEventArgs e) { DataSet data = DBClient.GetEmployee(_EID[0]); //... //... byte[] pic = (byte[])dat

我无法从SQL Server 2008数据库读取图像并将其加载到Windows窗体

PictureBox

。以下是从DB检索图像的代码：

//UI Button Binded Code
private void LoadImage_Click(object sender, RoutedEventArgs e)
{
   DataSet data = DBClient.GetEmployee(_EID[0]);
   //...
   //...
   byte[] pic = (byte[])data.Tables[0].Rows[0]["Picture"];

   EmployeeCardForm ef = new EmployeeCardForm(name, fname, nic, deptt, desig, doj, address, ecode, pic);
   ef.Show();
}

 //EmployeeCardForm Constructor File Code
 public EmployeeCardForm(String name, String fname, String nic, String deptt, String desig, String doj, String address, String ecode, byte[] pic)
 {
        InitializeComponent();
        this.MaximizeBox = false;
        label18.Text = "Record has been successfully Saved. Please take Print out by pressing Print Button below!";
        try
        {
            pictureBox1.Image = Image.FromStream(new MemoryStream(pic));
            //Some code here
        }
        catch (IOException e)
        {
            MessageBox.Show("Some Error occurred!");
        }
        //declare event handler for printing in constructor
        printdoc1.PrintPage += new PrintPageEventHandler(printdoc1_PrintPage);
    }

当我运行此程序并单击按钮加载图像时，应用程序变得无响应。调试后，我发现以下代码行有问题：

pictureBox1.Image = Image.FromStream(new MemoryStream(pic));

当我使用try/catch块时，它显示了以下异常：

System.ArgumentException:参数无效。在System.Drawing.Image.FromStream（Stream Stream，Boolean useEmbeddedColorManagement，Boolean validateImageData）在System.Drawing.Image.FromStream（Stream Stream）在SimpleReport.EmployeeCardForm..ctor（字符串名称，字符串fname，字符串nic，字符串deptt，字符串设计，字符串doj，字符串地址，字符串ecode，字节[]pic）在D:\O Projects\EM\SimpleReport\EmployeeCardForm.cs中：第60行

以下是我将图像保存到DB的方式：

private void SaveImage_Click(object sender, RoutedEventArgs e)
{
     Picture_Path= filename;
     FileStream fs;
     fs = new FileStream(@Picture_Path, FileMode.Open, FileAccess.Read);
     //a byte array to read the image
     byte[] picbyte = new byte[fs.Length];
     fs.Read(picbyte, 0, System.Convert.ToInt32(fs.Length));
     fs.Close();
     DBClient.AddEmployee(ecode, emp_name.Text, fname, nic, deptt, desig, doj, address, picbyte);
}

请帮帮我

在一些聊天之后，问题是图片二进制文件以不正确的格式存储在数据库中。这可能有几个问题：

表字段的类型/大小不正确

不正确的字节读取

首先检查是否有数据表字段的

varbinary（max）

type\size

第二，以下是如何读取文件的所有字节：

private void SaveImage_Click(object sender, RoutedEventArgs e)
{
    byte[] allFileBytes = File.ReadAllBytes(filename); 
    DBClient.AddEmployee(ecode, emp_name.Text, fname, nic, deptt, desig, doj, address, allFileBytes);
}