c# - SQLException 未处理。在 GridView 中查看 Excel 文件

Question

我一直在做一个 C# 项目，在该项目中我在 GridView 中浏览和查看 Excel 文件。但是，有一条我不明白的错误消息。有人可以帮我解决这个问题吗？

这是我使用的代码:

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

您正在尝试通过 SqlConnection 连接到 Excel。

要连接到 Excel，请使用 OleDBConnection:

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(); 
}