C#统计shp属性内容，求帮助，有详细解答

Question

我想从listbox里选中的属性名称，在shp文件里查找并统计数据，并将结果输出到datagridview2中，程序出现错误，求解决

private void button3_Click(object sender, EventArgs e)
{
string table = dbfFileName;
string strConnection =
@"Dsn=Visual FoxPro Tables;sourcedb=" + table + ";sourcetype=DBF;exclusive=No;backgroundfetch=Yes;collate=Machine";

        //对于连接串，注意版本问题

        string strSelect = "SELECT * FROM  " + table;

        OdbcConnection thisConnection = new OdbcConnection(strConnection);

        thisConnection.Open();

        OdbcDataAdapter thisAdapter = new OdbcDataAdapter(strSelect, thisConnection);

        DataSet thisDataSet = new DataSet();

        try
        {

            thisAdapter.Fill(thisDataSet);

        }

        catch (Exception exec)
        {

            MessageBox.Show(exec.Message);

        }




        for (int i = 0; i < listBox1.Items.Count; i++)
        {
            OdbcConnection Connection = new OdbcConnection(strConnection);

            Connection.Open();
            string sql = "select sum(listBox1.Items[i].ToString()) from table ";
            OdbcDataAdapter da = new OdbcDataAdapter(sql, Connection);

            DataSet ds = new DataSet();
            da.Fill(ds);
            this.dataGridView2.DataSource = ds.Tables[0];
            Connection.Close();

        }


        thisConnection.Close();

    }

            ![图片说明](https://img-ask.csdn.net/upload/201512/31/1451553383_101520.png)

            ![图片说明](https://img-ask.csdn.net/upload/201512/31/1451553469_130779.png)

Answer 1

string table = dbfFileName;
包含完整路径看看，根据提示，现在你文件没有找到。