Question

我已经在下一步做了一个砖墙，从目前我拥有的数据集填充组合框。我的数据库调用“PID2db.mdb”，表名为“Customer”

        string strCon = Properties.Settings.Default.PID2dbConnectionString;
        OleDbConnection conn = new OleDbConnection(strCon);
        try {
            conn.Open();
            string strSql = "Select forename,surname from customer where [customerID] ='" + txtName.Text + "'";
             OleDbDataAdapter adapter = new OleDbDataAdapter(new OleDbCommand(strSql, conn));
            DataSet ds = new DataSet();
            adapter.Fill(ds);
            cboName.DataSource = ds.Tables[0];
            cboName.DisplayMember = "forename";
            cboName.ValueMember = "surname";
        }
        finally {
            conn.Close();
        }
    }

感谢任何帮助，谢谢

编辑：添加了新的代码段

Answer 1

假设您有一张表格：

Combobox名为cboName
TextBox名为txtName

试试这个：

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            LoadCustomerOnCombo();
        }

        private void LoadCustomerOnCombo()
        {
            string strCon = Settings.Default.PID2dbConnectionString;

            try
            {
                using (OleDbConnection conn = new OleDbConnection(strCon))
                {
                    conn.Open();
                    string strSql = "SELECT forename &\" \" & surname AS FullName, surname FROM customer"; //WHERE [customerID] ='" + txtName.Text + "'";
                    OleDbDataAdapter adapter = new OleDbDataAdapter(new OleDbCommand(strSql, conn));
                    DataSet ds = new DataSet();
                    adapter.Fill(ds);
                    cboName.DataSource = ds.Tables[0];
                    cboName.DisplayMember = "FullName";
                    cboName.ValueMember = "surname";
                }     
            }
            catch (Exception ex)
            {
                txtName.Text = ex.Message;
                Console.WriteLine(ex.Message);
            }
        }
    }

如果是这样的话，请告诉我当前的评论是什么，留下评论，否则有任何错误，你会在文本框内看到。

Answer 2

您需要创建一个新的DataSet，用Data填充它，最后设置ComboBox的DataSource，DisplayMember和ValueMember属性。这是代码：

using System.Data.OleDb;

            string strCon = Properties.Settings.Default.PID2dbConnectionString;
            OleDbConnection conn = new OleDbConnection(strCon);
            try {
                conn.Open();
                string strSql = "Select forename,surname from customer where customer id ='" + txtName.Text + "'";
                OleDbDataAdapter adapter = new OleDbDataAdapter(new OleDbCommand(strSql, conn);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                comboBox1.DataSource = ds.Tables[0];
                comboBox1.DisplayMember = "forename";
                comboBox1.ValueMember = "surname";
            }
            finally {
                conn.Close();
            }

如何从Access数据集/数据库填充组合框

2 个答案: