Question

我正在尝试实施一个新项目。我想将一个SQL表动态写入例如一个asp：gridview。而且这个网格应该是可编辑的。

我找到了一些解决方案，但是它们都是静态的。但是表必须是动态的，因为我想在网格中包括不同的SQL表。（SQL表有时会更改，列会被删除或添加新列。因此，静态解决方案不适用。

理想情况下，编辑功能应该像在Excel文档中一样工作。更改数据后，应使用保存按钮将其写回到SQL表。

那有可能吗？至少在过去的四个小时内，我还没有找到解决该问题的方法。

谢谢您的帮助

问候

更新

//HTML Code:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <h1>Personaldaten</h1>
            <asp:GridView ID="personal_data" AutoGenerateColumns="true" runat="server"></asp:GridView>
            <asp:Button runat="server" ID="button1" text="Save"/>
        </div>
    </form>
</body>
</html>

//Code behind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace Editable_SQL_Table
{
    public partial class table : System.Web.UI.Page
    {
            SqlDataAdapter sda;
            SqlCommandBuilder scb;
            DataTable dt;

            public form1()
            {
                InitializeComponent();
            }

            public void form1_Load(object sender, EventArgs e)
            {
                SqlConnection con = new SqlConnection(@"Server = (localdb)\\MSSQLLocalDB; Database = Personal; Trusted_Connection = True; MultipleActiveResultSets = true");
                sda = new SqlDataAdapter(@"SELECT* FROM dbo.MyTable", con);
                dt = new DataTable();
                sda.Fill(dt);
                dataGridView1.DataSource = dt;

            }

            private void button1_Click(object sender, EventArgs e)
            {
                scb = new SqlCommandBuilder(sda);
                sda.Update(dt);
                MessageBox.Show("Table updated");
            }
    }
}

我尝试使用user2980341的编码，但是“ dataGridView1.DataSource = dt;”有问题。我认为对于“ dataGridView1”，我应该使用Gridview中的ID，但是我无法使用。调试器说，他不识别“ personal_data”。还有函数“ InitializeComponent（）;”没有发现。

感谢您的进一步帮助，我目前正在研究以下解决方案：

//HTML
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="table.aspx.cs" Inherits="Editable_SQL_Table.table" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <h1>Personaldaten</h1>
            <asp:GridView ID="personal_data" AutoGenerateEditButton="true" AutoGenerateColumns="true" runat="server" OnRowUpdating="personal_data_RowUpdating" OnRowCancelingEdit="personal_data_RowCancelingEdit" OnRowEditing="personal_data_RowEditing"></asp:GridView>
        </div>
    </form>
</body>
</html>

//Code behind
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace Editable_SQL_Table
{
    public partial class table : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            string table = "dbo.Mitarbeiter";
            string query = "SELECT * FROM" + " " + table;
            string ConnectionString = "Server = (localdb)\\MSSQLLocalDB; Database = Personal; Trusted_Connection = True; MultipleActiveResultSets = true";
            using (SqlConnection myConnection = new SqlConnection(ConnectionString))
            {
                using (SqlCommand cmd = new SqlCommand(query, myConnection))
                {
                    myConnection.Open();
                    SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                    DataTable dt = new DataTable();
                    dt.Load(dr);
                    personal_data.DataSource = dt;
                    personal_data.DataBind();
                }
            }
        }

        protected void personal_data_RowEditing(object sender, GridViewEditEventArgs e)
        {
            personal_data.EditIndex = e.NewEditIndex;
        }

        protected void personal_data_RowUpdating(object sender, GridViewEditEventArgs e)
        {
            //personal_data.EditIndex = e.NewEditIndex;
        }

        protected void personal_data_RowCancelingEdit(object sender, GridViewEditEventArgs e)
        {
            //personal_data.EditIndex = e.NewEditIndex;
        }
    }
}

Answer 1

也许是这样的：在表单上添加DataGridView和一个Button元素。然后将此代码附加到您的元素上：

using System.Data.SqlClient;

namespace test
{
public partial class Form1 : Form
{
    SqlDataAdapter sda;
    SqlCommandBuilder scb;
    DataTable dt;

    public Form1()
    {
        InitializeComponent();
    }

private void Form1_Load(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection (@"Server=myServerAddress;Database=myDataBase;Trusted_Connection=True;");
        sda = new SqlDataAdapter(@"SELECT* FROM dbo.MyTable", con);
        dt = new DataTable();
        sda.Fill(dt);
        dataGridView1.DataSource = dt; 
    }

    private void button1_Click(object sender, EventArgs e)
    {
        scb = new SqlCommandBuilder(sda);
        sda.Update(dt);
        MessageBox.Show("Table updated");
    }
}

}

该程序连接到您的SQL数据库，并从该数据库中检索SQL表。使用button1更新对数据库的更改。但是，您无法通过此解决方案删除或添加列。

asp.net使用sql数据创建一个动态网格并使其可编辑

1 个答案: