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所以我一直在研究一个小应用程序，到目前为止它非常愉快。您可以选择所需的任何 Excel 文件和所需的任何 Access 数据库，然后将 Excel 数据保存到其中。它还在 dataGridview 中显示 Excel 数据。最终，我希望能够自行更改 Gridview 中的数据并能够保存它，但那是另一次了。现在我想知道如何制作一个组合框，让我选择 Excel 文件的工作表。

我当前的 GUI 如下所示： GUI

物品名称：

btnrun - "Runs" the excel file in the datagridview
btnbrowse - chooses which Excel file you want to use
btnbrowse2 - chooses which Access Database file you want to use
btnsave - saves Excel data to Access Database
textBox1 - Shows the file path for Excel
textBox2 - Shows the file path for Access Database
comboBox1 - This is where i need help :)
dataGridView1 - Shows the Excel data

这是我当前的代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;

namespace Datatestje
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        //Buttons
        private void btnrun_Click(object sender, EventArgs e) //Run
        {
            string EXpath = textBox1.Text;
            string PathConn = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source =" + EXpath + ";Extended Properties=\"Excel 8.0;HDR=Yes;\";";
            OleDbConnection conn = new OleDbConnection(PathConn);

            var sqlQuery = "Select * from [Sheet1$]";
            OleDbDataAdapter myDataAdapter = new OleDbDataAdapter(sqlQuery, conn);
            DataTable dt = new DataTable();

            myDataAdapter.Fill(dt);
            dataGridView1.DataSource = dt;
        }

        private void btnsave_Click(object sender, EventArgs e) //Save
        {
            {
                //File Path
                string EXpath = textBox1.Text;
                string fileNameExcel = @EXpath;
                string ACpath = textBox2.Text;
                string fileNameAccess = @ACpath;

                //Connection string for Excel
                string connectionStringExcel =
                    string.Format("Data Source= {0};Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;", fileNameExcel);

                //Connection string for Access
                string ConnectionStringAccess =
                    string.Format("Data Source= {0}; Provider=Microsoft.Jet.OLEDB.4.0; Persist security Info = false", fileNameAccess);

                OleDbConnection connExcel = new OleDbConnection(connectionStringExcel);
                OleDbConnection connAccess = new OleDbConnection(ConnectionStringAccess);
                OleDbCommand cmdExcel = connExcel.CreateCommand();
                cmdExcel.CommandType = CommandType.Text;

                //Excel Sheet
                cmdExcel.CommandText = "SELECT * FROM [Sheet1$]";

                //Command object for Access
                OleDbCommand cmdAccess = connAccess.CreateCommand();
                cmdAccess.CommandType = CommandType.Text;
                
                //Add parameters *
                cmdAccess.CommandText = "INSERT INTO Informatie (Naam, Achternaam, Land, Stad, Huisnummer, Postcode, Telefoonnummer) VALUES(@Naam, @Achternaam, @Land, @Stad, @Huisnummer, @Postcode, @Telefoonnummer)";

                //Add parameters to Access command object **
                OleDbParameter param1 = new OleDbParameter("@Naam", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param1);
                OleDbParameter param2 = new OleDbParameter("@Achternaam", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param2);
                OleDbParameter param3 = new OleDbParameter("@Land", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param3);
                OleDbParameter param4 = new OleDbParameter("@Stad", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param4);
                OleDbParameter param5 = new OleDbParameter("@Huisnummer", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param5);
                OleDbParameter param6 = new OleDbParameter("@Postcode", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param6);
                OleDbParameter param7 = new OleDbParameter("@Telefoonnummer", OleDbType.VarChar);
                cmdAccess.Parameters.Add(param7);


                //Open connections
                connExcel.Open();
                connAccess.Open();
                OleDbDataReader drExcel = cmdExcel.ExecuteReader();

                while (drExcel.Read())
                {
                    //Assign values to access command parameters ***
                    param1.Value = drExcel[0].ToString();
                    param2.Value = drExcel[1].ToString();
                    param3.Value = drExcel[2].ToString();
                    param4.Value = drExcel[3].ToString();
                    param5.Value = drExcel[4].ToString();
                    param6.Value = drExcel[5].ToString();
                    param7.Value = drExcel[6].ToString();

                    //Insert values in access
                    cmdAccess.ExecuteNonQuery();
                }

                //close connections
                connAccess.Close();
                connExcel.Close();
                MessageBox.Show("Succesfully uploaded Excel data to Database.");

            }
        }

        private void btnbrowse_Click_1(object sender, EventArgs e)
        {
            OpenFileDialog openfiledialog1 = new OpenFileDialog();
            openfiledialog1.ShowDialog();
            openfiledialog1.Filter = "allfiles|*.xls";
            textBox1.Text = openfiledialog1.FileName;
        }

        private void btnbrowse2_Click(object sender, EventArgs e)
        {
            OpenFileDialog openfiledialog1 = new OpenFileDialog();
            openfiledialog1.ShowDialog();
            openfiledialog1.Filter = "allfiles|*.mdb";
            textBox2.Text = openfiledialog1.FileName;
        }
    }
}

是的。任何帮助，将不胜感激。

谢谢 ：）

4

1 回答 1

1

您应该能够通过以下方式获取工作表名称：

DataTable dtSheets = conn.GetSchema("Tables")

您可以通过简单的 Google 搜索找到如何填充 ComboBox。您只需将“Sheet1$”替换为所选工作表的名称即可使用工作表内容填充数据表

 var sqlQuery = "Select * from [" + strSheetName + "]";
于 2020-07-06T13:56:13.110 回答