Question

我一直在做一个 C# 工程, 我浏览并浏览一个 Excel 文件到网格视图中。但是, 有一个错误信息, 我无法理解。有人能帮我一下吗。

这是我用的代码:

private void buttonUpload_Click(object sender, EventArgs e)
{
    string connectionString = String.Format(@"Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", textBoxFileName.Text);

    string query = String.Format("select * from [{0}$]", "Sheet1");

    SqlDataAdapter dataAdapter = new SqlDataAdapter(query, connectionString);

    DataSet dataSet = new DataSet();

    dataAdapter.Fill(dataSet);

    dataGridView1.DataSource = dataSet.Tables[0];
}

这是错误消息 :

"A network-related or instance-specific error occurred while establishing 
a connection to SQL Server. The server was not found or was not accessible. 
Verify that the instance name is correct and that SQL Server is configured 
to allow remote connections. 
(provider: SQL Network Interfaces, 
error: 26 - Error Locating Server/Instance Specified)."

Answer 1

您正在试图通过 SqlConnect 连接到Excel。

要连接到Excel, 请使用 OleDBConnect :

private void buttonUpload_Click(object sender, EventArgs e)
{
   string connectionString = String.Format(@"Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", textBoxFileName.Text)
   var objConn = new OleDbConnection(connectionString);

   objConn.Open(); 

   OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [Sheet1$]", objConn);

   OleDbDataAdapter objAdapter1 = new OleDbDataAdapter(); 

   objAdapter1.SelectCommand = objCmdSelect; 

   DataSet objDataset1 = new DataSet(); 

   objAdapter1.Fill(objDataset1); 

   objConn.Close(); 
}

Answer 2

您不能为 ODBC 或 JET 连接使用 SqlConnection 或 SqlDataAdapter 。请使用 OleDbConnection 或 OleDbDataAdapter 。

还请确保及时处置连接和资源。在此建议使用 < code> using 语句。

private void buttonUpload_Click(object sender, EventArgs e)
{
   string connectionString = String.Format(@"Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", textBoxFileName.Text);
   DataSet objDataset1 = new DataSet();

   using (OleDbConnection objConn = new OleDbConnection(connectionString))
   {
       objConn.Open(); 

       using (OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [Sheet1$]", objConn))
       using (OleDbDataAdapter objAdapter1 = new OleDbDataAdapter())
       {
           objAdapter1.SelectCommand = objCmdSelect;    
           objAdapter1.Fill(objDataset1); 
       }
   } 
}

友情链接