将图像添加到datatabale [英] Add image to datatabale

问题描述

我想将图像添加到数据表中，但出现错误.下面是我完成的代码.

值类型与列类型不匹配.无法存储< system.byte []>在徽标名列中.预期的类型为Byte [].

我在此行得到的错误 dt.Rows.Add(imageDataSet.Tables [0] .Rows [rowNumber] [0] .ToString());

i want to add image to datatble but getting an error.below is code i have done.

Type of value has a mismatch with column typeCouldn''t store <system.byte[]> in logoname Column. Expected type is Byte[].

this error i got at this line dt.Rows.Add(imageDataSet.Tables[0].Rows[rowNumber][0].ToString());

DataTable dt = new DataTable();
dt.Columns.Add("logoname", System.Type.GetType("System.Byte[]"));

 for (int rowNumber = 0; rowNumber < imageDataSet.Tables[0].Rows.Count; rowNumber++)
          {
              DisplayImages(imageDataSet.Tables[0].Rows[rowNumber],"abc.jpg");
              dt.Rows.Add(imageDataSet.Tables[0].Rows[rowNumber][0].ToString());
          }

private void DisplayImages(DataRow row, string ImagePath)
        {
            FileStream imageStream = new FileStream(ImagePath, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(imageStream);
           
            row[0] = br.ReadBytes(Convert.ToInt32(br.BaseStream.Length));
        }

推荐答案

您需要创建一个将图像转换为字节数组的函数.试试这个:

You need to create a function which will convert an image to byte array. Try this:

private byte[] GetByteArray(String strFileName)
{
    System.IO.FileStream fs = new System.IO.FileStream(strFileName, System.IO.FileMode.Open);
    // initialise the binary reader from file streamobject
    System.IO.BinaryReader br = new System.IO.BinaryReader(fs);
    // define the byte array of filelength

    byte[] imgbyte = new byte[fs.Length + 1];
    // read the bytes from the binary reader

    imgbyte = br.ReadBytes(Convert.ToInt32((fs.Length)));
    // add the image in bytearray
    
    br.Close();
    // close the binary reader

    fs.Close();
    // close the file stream
    return imgbyte;
}

现在调用上面的函数，并将您的图像添加到数据表中.试试这个:

Now call the above function and add your image to datatable. Try this:

DataTable dt = new DataTable();
dt.Columns.Add("Image", typeof(byte[]));
dt.Rows[0]["Image"] = GetByteArray(strFilePath);
//this will add a row with the image. Accordingly, you need to loop and add the rows as required.

希望对您有帮助！
    -授予

Hope it helps!
     --Amit

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