C# 讀取數據庫word 和寫入數據庫word文件

要實現在Sql Server中實現將文件讀寫Word文件，需要在要存取的表中添加Image類型的列，示例表結構爲:

CREATE TABLE CONTRACTS (
    ID VARCHAR (50),
    CONTRACT_FILE IMAGE
);

要將Word文件存儲到數據庫的CONTRACT_FILE字段中，需要將文件轉換爲byte數組，具體代碼如下：

 1  /// <summary>
 2         /// 將文件轉換爲Bytes
 3         /// </summary>
 4         /// <param name="fileName"></param>
 5         /// <returns></returns>
 6         public static byte[] File2Bytes(string fileName)
 7         {
 8             FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Read);
 9             byte[] fileDatas = new byte[fs.Length];
10             fs.Read(fileDatas, 0, System.Convert.ToInt32(fs.Length));
11             fs.Close();
12             return fileDatas;
13         }

然後將轉換完成的byte[]存儲到數據庫的對應字段：

 1  /// <summary>
 2         /// 更新合同文件
 3         /// </summary>
 4         /// <param name="id"></param>
 5         /// <param name="fileBytes"></param>
 6         /// <returns></returns>
 7         public bool UpdateContractFile(string id, byte[] fileBytes)
 8         {
 9             string sql = "UPDATE CONTRACTS SET CONTRACT_FILE=@CONTRACT_FILE WHERE ID=@ID";
10             using (SqlConnection conn = new SqlConnection(this.m_DataAccess.ConnectString))
11             {
12                 conn.Open();
13                 using (SqlCommand cmd = new SqlCommand())
14                 {
15                     cmd.Connection = conn;
16                     cmd.CommandText = sql;
17                     cmd.Parameters.Clear();
18 
19                     cmd.Parameters.Add(new SqlParameter("@CONTRACT_FILE", SqlDbType.Image));
20                     cmd.Parameters["@CONTRACT_FILE"].Value = fileBytes;
21 
22                     cmd.Parameters.Add(new SqlParameter("@ID", SqlDbType.VarChar));
23                     cmd.Parameters["@ID"].Value = id;
24 
25                     return cmd.ExecuteNonQuery() > 0 ? true : false;
26                 }
27             }
28         }

要讀取數據庫中存儲的Word文件，需要先將Image類型的字段轉換爲bytes[]，具體代碼如下：

 1 /// <summary>
 2         /// 獲取合同文件
 3         /// </summary>
 4         /// <param name="id"></param>
 5         /// <returns></returns>
 6         public byte[] GetContractFile(string id)
 7         {
 8             string sql = "SELECT CONTRACT_FILE FROM CONTRACTS WHERE ID='{0}'";
 9             sql = string.Format(sql, id);
10             object contractFile;
11             contractFile = this.m_DataAccess.ExecuteScalar(sql);
12             if (contractFile == null)
13             {
14                 return new byte[0];
15             }
16             else
17             {
18                 return (byte[])contractFile;
19             }
20         }

在獲取到文件的byte[]後，將該文件通過文件流操作存儲爲Word文件，具體代碼如下：

 

 1 byte[] fileBytes = this.m_ContractsBusiness.GetContractFile(id);
 2                 if (fileBytes.Length == 0)
 3                 {
 4                     XMessageBox.ShowError("未找到合同文件！");
 5                     return;
 6                 }
 7                 SaveFileDialog sfd = new SaveFileDialog();
 8                 sfd.Filter = "Word文件(*.doc)|*.doc";
 9                 if (sfd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
10                 {
11                     try
12                     {
13                         string saveFileName = sfd.FileName;
14                         int arraysize = new int();//注意這句話
15                         arraysize = fileBytes.GetUpperBound(0);
16                         FileStream fs = new FileStream(saveFileName, FileMode.OpenOrCreate, FileAccess.Write);
17                         fs.Write(fileBytes, 0, arraysize);
18                         fs.Close();
19                         if (XMessageBox.ShowQuestion("文件下載成功，是否立即打開文件？") ==
20                             System.Windows.Forms.DialogResult.Yes)
21                         {
22                             Process.Start(saveFileName);
23                         }
24                     }
25                     catch (Exception ex)
26                     {
27                         XMessageBox.ShowError("下載文件失敗！");
28                     }