从MS Access数据库获取数据并将其显示在列表框中

Question

如何读取ms access数据库中的数据并将其显示在列表框中。我有代码在这里，但我有错误。

 private void button3_Click(object sender, EventArgs e)
    {
        using (OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\\Sisc-stronghold\mis!\wilbert.beltran\DataBase\DataStructure.accdb"))
        using(OleDbCommand cmd = new OleDbCommand(" SELECT * from TableAcct", conn))
        {
            conn.Open();
            OleDbDataReader Reader = cmd.ExecuteReader();
            //if (Reader.HasRows)
            if (Reader.HasRows)
            {
                Reader.Read();
                listBox1.Text = Reader.GetString("FirstName");
            }
        } 

错误如下: 1.错误1最佳重载方法匹配for'System.Data.Common.DbDataReader.GetString(int)‘有一些无效参数。2.错误2参数“%1”：无法从“string”转换为“int”

Answer 1

试试这个，

       List<String> firstName = new List<String>();
       List<String> lastName = new List<String>();

       private void loadButton_Click(object sender, EventArgs e)
       {
                cn.Open();
                OleDbDataReader reader = null;
                cmd = new OleDbCommand("select* from Records", cn);
                reader = cmd.ExecuteReader();
                while (reader.Read())
                {
                    firstName.Add(reader["FirstName"].ToString());
                    lastName.Add(reader["LastName"].ToString());
                }
                cn.Close();
       }

然后在你的搜索按钮中插入这个

private void searchButton_Click(object sender, EventArgs e)
        {
            clearSearchResult();
            try
            {
                int totalItems = FirstName.Count;
                int count = 0;
                while (count < totalItems)
                {
                    if (textBox6.Text == FirstName[count].ToString())
                    {
                        listBox1.Items.Add(FirstName[count].ToString());
                        count = 100;
                    }
                    else
                    {
                        count++;
                    }

如果您想要在listBox1_SelectedIndexChanged中显示"FirstName"的信息，那么使用它是很好的。这里有一个例子，

private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
                int totalItems = lastName.Count;
                int count = 0;
                while (count < totalItems)
                {
                    if ((listBox1.SelectedItem.ToString()) == firstName[count].ToString()))
                    {
                        textBox1.Text = firstName[count].ToString();
                        textBox2.Text = lastName[count].ToString();
                        count = 100;
                    }
                    else
                    {
                        count++;
                    }
               }

希望这能帮上忙

Answer 2

GetString()接受整数作为参数，而不是字符串。这意味着您必须使用列的索引。

在您的特定环境中，因为"FirstName“是第二列，所以索引应该是1：

listBox1.Text = Reader.GetString(1);

http://msdn.microsoft.com/en-us/library/system.data.oledb.oledbdatareader.getstring.aspx

Answer 3

变化

listBox1.Text = Reader.GetString("FirstName");

至

listBox1.Text = Reader.GetString(0); // zero base ordinal of column