插入圖像到excel表格不工作

Question

我想插入一個圖像，像下面的Excel表格。

Image img = Image.FromFile("test.jpg"); 
sheet.get_Range("A1").set_Item(1,1,img); 

但是當Excel在A1單元格中打開沒有任何圖片，
但只有這樣的結果：System.Drawing.Bitmap那麼，什麼是問題
，我怎麼能解決這個問題。 而第二個問題是：
如何插入excel如果我的圖片位於數據庫中。我不想將它們保存到計算機插入到Excel中？ [WinForm的]

Answer 1

Try this: 

object missing = System.Reflection.Missing.Value; 
Excel.Range picPosition = sheet.get_Range("A1"); // retrieve the range for picture insert 
Excel.Pictures p = yourWorksheet.Pictures(missing) as Excel.Pictures; 
Excel.Picture pic = null; 
pic = p.Insert(yourImageFilePath, missing); 
pic.Left = Convert.ToDouble(picRange.Left); 
pic.Top = picRange.Top; 
pic.Placement = // Can be any of Excel.XlPlacement.XYZ value 

Answer 2

System.Data.SqlClient.SqlDataReader rdr = null; 
      System.Data.SqlClient.SqlConnection conn = null; 
      System.Data.SqlClient.SqlCommand selcmd = null; 
      try 
      { 
       conn = new System.Data.SqlClient.SqlConnection 
      (System.Configuration.ConfigurationManager.ConnectionStrings 
      ["ConnectionString"].ConnectionString); 
//here set your query to get image from databse 
       selcmd = new System.Data.SqlClient.SqlCommand 
      ("select pic1 from msg where msgid=" + 
      context.Request.QueryString["imgid"], conn); 
       conn.Open(); 
       rdr = selcmd.ExecuteReader(); 
       while (rdr.Read()) 
       { 
       byte[] YourImagebytearray = ((byte[])rdr["pic1"]); 
       MemoryStream stream = new MemoryStream(bytes); 
       var newImage = System.Drawing.Image.FromStream(stream); 
       stream.Dispose(); 
       } 
       if (rdr != null) 
       rdr.Close(); 
      } 
      finally 
      { 
       if (conn != null) 
        conn.Close(); 
      }