Question

我正在尝试使用npgsql创建我的新asp.net网站。我的数据库如下所示：

[oid, countyname, status]

使用npgsql我已经在gridview中连接并显示数据。我用这段代码完成了这个：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Npgsql;
using System.Data;
using System.Web.Security;


public partial class Secured_pia : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {         
        string sQuery = "SELECT countyname, status FROM countydb";
        string sConn = "Server=localhost;Port=5432;User Id=user1;Password=pass2;Database=database;";

        DataTable DT = new DataTable();
        NpgsqlConnection Conn = new NpgsqlConnection(sConn);

        Conn.Open();

        DataSet DS = new DataSet("DS1");
        NpgsqlDataAdapter DA = new NpgsqlDataAdapter();

        DA.SelectCommand = new NpgsqlCommand(sQuery, Conn);

        DA.Fill(DS, "DS1");

        GridView1.DataSource = DS;
        GridView1.DataBind();

        Conn.Close();
    }
}

一切正常。现在我要编辑该表。正如我读得好，我可以使用NpgsqlCommandBuilder来制作插入，更新和删除命令。所以我把代码更改为：

DA.SelectCommand = new NpgsqlCommand(sQuery, Conn);
NpgsqlCommandBuilder UpdateCMD = new NpgsqlCommandBuilder(DA);         
DA.Fill(DS, "DS1");

现在，我不知道如何开启编辑。该代码是否足以在gridview中启用编辑？我的aspx代码如下所示：

<asp:GridView ID="GridView1" runat="server">
    <Columns>
        <asp:CommandField ShowEditButton="true" />
    </Columns>
</asp:GridView>

aspx.cs代码好吗？我是否必须在gridview中添加任何属性？感谢您的回复，对不起我的简单问题。我是新手。

Answer 1

我只想在gridview旁边的页面上添加一个按钮。然后实现您的更新按钮单击事件，如下所示：

 public partial class Secured_pia : System.Web.UI.Page
    {
        String sConn = "Your connection string";
        private NpgsqlConnection conn;
        private NpgsqlDataAdapter da;
        private DataSet ds = new DataSet();
        private DataTable dt = new DataTable();
        private NpgsqlCommandBuilder cb;

        public Secured_pia ()
        {
            InitializeComponent();
        }
//your form load code above goes here but you will have to do 
//a global declaration like I did here instead of in the form load event like you have. 

//update button implementation.  
private void btnUpdate_Click(object sender, EventArgs e)
 {
    cb = new NpgsqlCommandBuilder(da);           
    da.Update(dt);
 }

Npgsql并在gridview中更新数据

1 个答案: