从 MS Access 数据库中获取数据并将其显示在列表框中 [英] Getting data from MS Access database and display it in a listbox

问题描述

如何读取 ms access 数据库中的数据并将其显示在列表框中.我这里有代码，但出现错误.

How do I read data in ms access database and display it in a listbox. I have the codes here but i got errors.

 private void button3_Click(object sender, EventArgs e)
    {
        using (OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\Sisc-strongholdmis!wilbert.beltranDataBaseDataStructure.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");
            }
        } 

错误在这里:1. 错误 1 ​​'System.Data.Common.DbDataReader.GetString(int)' 的最佳重载方法匹配有一些无效参数.2. 错误 2 参数 '1':无法从 'string' 转换为 'int'

the errors are here: 1. Error 1 The best overloaded method match for'System.Data.Common.DbDataReader.GetString(int)' has some invalid arguments. 2. Error 2 Argument '1': cannot convert from 'string' to 'int'

推荐答案

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();
       }

然后在您的搜索按钮中插入这个，

then in your search button, insert this,

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++;
                    }

当你想在listBox1_SelectedIndexChanged中显示"FirstName"的信息时使用它是很好的.这是一个例子，

It's good to use when you want to show the information of the "FirstName" in the listBox1_SelectedIndexChanged if you want. here's an example,

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++;
                    }
               }

希望能帮到你，

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