在c＃中检索图像到图片框时，我得到的错误参数无效 [英] i got error parameter is not valid while retrieving image to picture box in c#

问题描述

我已编写此代码用于从数据库检索图像到图片框。我在这一行'pictureBox1.Image = Image.FromStream（stm）中得到了这些错误'参数无效';

I have written this code for retrieving image from database to picturebox. I got these error 'Parameter is not valid' at this line 'pictureBox1.Image = Image.FromStream(stm);

Byte[] imagebyte = new Byte[0];
                   imagebyte = (Byte[])(dr["Pic_Image"]);

MemoryStream stm = new MemoryStream（imagebyte）;

pictureBox1.SizeMode = PictureBoxSizeMode。 StretchImage;

pictureBox1.Image = Image.FromStream（stm）;



它将该图像存储为数据库中的0x53797374656D2E44726177696E672E4269746D6170

你会解决这个错误吗。

MemoryStream stm = new MemoryStream(imagebyte);
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
pictureBox1.Image = Image.FromStream(stm);

It is storing that image as 0x53797374656D2E44726177696E672E4269746D6170 in database
would u pls solve this error.

推荐答案

所以你的步骤会是这样的



1.此代码从< sometable>中检索行。将数据库中的表放入DataSet中，将最近添加的图像复制到Byte数组中，然后复制到MemoryStream对象中，然后将MemoryStream加载到PictureBox控件的Image属性中。



2.将数据导入数据集后，计算编号。检索到数据表的图像。

So your steps would be like this

1.This code retrieves the rows from the <sometable> table in the database into a DataSet, copies the most recently added image into a Byte array and then into a MemoryStream object, and then loads the MemoryStream into the Image property of the PictureBox control.

2. After getting data into Dataset, count the no. of images retrieved into datatable.

if(c>0)
    {   //BLOB is read into Byte array, then used to construct MemoryStream,
        //then passed to PictureBox.
        Byte[] byteBLOBData =  new Byte[0];
        byteBLOBData = (Byte[])(ds.Tables["BLOBTest"].Rows[c - 1]["BLOBData"]);
        MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
        pictureBox1.Image= Image.FromStream(stmBLOBData);
    }

C=从数据表中检索到的行数

"C" = count of rows retrieved from data table

您好，



从Sqlserver检索图像时，通过这种方式将byte []转换为原始格式。

Hello ,

While retrieving the image from Sqlserver convert the byte[] into original format by this way.

public Image GetDataToImage(byte[] pData)
        {
            try
            {
                ImageConverter imgConverter = new ImageConverter();
                return imgConverter.ConvertFrom(pData) as Image;
            }
            catch (Exception ex)
            {
                MsgBox.Show(ex.Message, "Error", MsgBox.Buttons.OK, MsgBox.Icon.Error);
                return null;
            }
        }

并最终通过调用GetDataToImage这个函数设置图片框图像，然后在图片框中加载图片

and ultimately set the picturebox image by call "GetDataToImage" this function before load the image in picturebox

pictureBox1.Image = GetDataToImage((byte[])byteimage);

谢谢

thanks

在数据库中它存储如下0x53797374656D2E44726177696E672E4269746D6170



可以解决错误

In database it stored like this 0x53797374656D2E44726177696E672E4269746D6170

Can u pls solve the error

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