上面的代码你好像没有写完

非常抱歉，上面的代码确实没有写完，下面是完整的代码：

// 引用 Microsoft.Office.Interop.Excel.dll
using Microsoft.Office.Interop.Excel;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;

// 选择Excel文件的路径
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "Excel Files|*.xls;*.xlsx;*.xlsm";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
    string filePath = openFileDialog1.FileName;
    
    // 使用 Microsoft.Office.Interop.Excel.dll 读取 Excel 文件
    Application excelApp = new Application();
    Workbook workbook = excelApp.Workbooks.Open(filePath);
    Worksheet worksheet = workbook.Sheets[1];
    Range range = worksheet.UsedRange;

    // 将 Excel 中的数据导入到数据库中
    SqlConnection con = new SqlConnection("your connection string");
    con.Open();
    SqlCommand cmd;
    for (int row = 2; row <= range.Rows.Count; row++)
    {
        cmd = new SqlCommand("INSERT INTO your_table_name (column1, column2, column3) VALUES (@value1, @value2, @value3)", con);
        cmd.Parameters.AddWithValue("@value1", (range.Cells[row, 1] as Range).Value2.ToString());
        cmd.Parameters.AddWithValue("@value2", (range.Cells[row, 2] as Range).Value2.ToString());
        cmd.Parameters.AddWithValue("@value3", (range.Cells[row, 3] as Range).Value2.ToString());
        cmd.ExecuteNonQuery();
    }
    con.Close();
}

在上面的代码中，你需要根据你的实际需求修改连接字符串和插入语句中的表名和列名。