Wah*_*ver 17 mysql asp.net data-binding
我在尝试将mysql数据库连接到编辑器时遇到此错误,这里是后面的代码:
protected void Button1_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
MySqlConnection conn = new MySqlConnection(@"connection string");//tested and working
conn.Open();
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins");
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
da.SelectCommand = cmd;
da.Fill(dt);
if (dt.Rows.Count > 0)
{
Editor1.Content = dt.Rows[0]["tes"].ToString();
}
conn.Close();
}
这是aspx页面代码:
<body>
<form id="form1" runat="server">
<cc1:Editor ID="Editor1" runat="server" Height="400px" Visible="true" />
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</form>
我做错了什么,提前谢谢.
我正在使用asp.net 3.5.
Run*_*tad 33
改变线
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins");
至
MySqlCommand cmd = new MySqlCommand("SELECT tes FROM ins", conn);
它应该工作.
或者,将conn指定给cmd.Connection属性.
您的代码的问题是您从不为命令分配连接,因此错误表明连接未初始化.