GridView动态添加行(提供源代码)

最新推荐文章于 2021-06-20 14:57:29 发布

原创最新推荐文章于 2021-06-20 14:57:29 发布 · 3.2k 阅读

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#button #dataset #asp #string #server #object

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本文介绍了一个使用C#实现的网页应用程序案例，重点展示了如何通过ASP.NET的GridView控件进行数据展示与操作。文章详细说明了从数据库读取数据、填充GridView，并通过按钮点击事件增加新行的过程。

C#代码:

CODE:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
BindGrid();
}
}

private DataTable ReadGridView()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("ProductID", typeof(string)));
dt.Columns.Add(new DataColumn("ProductName", typeof(string)));
dt.Columns.Add(new DataColumn("CategoryID", typeof(string)));
for (int i = 0; i < this.GridView1.Rows.Count; i++)
{
dr = dt.NewRow();
dr[0] = this.GridView1.Rows[i].Cells[0].Text.Trim();
dr[1] = this.GridView1.Rows[i].Cells[1].Text.Trim();
dr[2] = this.GridView1.Rows[i].Cells[2].Text.Trim();
dt.Rows.Add(dr);
}
return dt;
}
protected void Button1_Click(object sender, EventArgs e)
{
DataTable dt = ReadGridView();
//this.GridView1.DataSource = dt;
//this.GridView1.DataBind();
DataRow row = dt.NewRow();
row.ItemArray = new object[] { "oec2003","oec2003","oec2003" };
dt.Rows.InsertAt(row, 0);
dt.AcceptChanges();
this.GridView1.DataSource = dt;
this.GridView1.DataBind();
}

private void BindGrid()
{
string str = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ToString();
using (SqlConnection con = new SqlConnection(str))
{
SqlCommand cmd = new SqlCommand("SELECT top 1 [ProductID], [ProductName], [CategoryID] FROM [Products]", con);
SqlDataAdapter sda = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
sda.Fill(ds);
this.GridView1.DataSource = ds.Tables[0].DefaultView;
this.GridView1.DataBind();
sda.Dispose();
ds.Dispose();
}

}
}

Html代码:

CODE:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID">
<Columns>
<asp:BoundField DataField="ProductID" HeaderText="ProductID" InsertVisible="False"
ReadOnly="True" SortExpression="ProductID" />
<asp:BoundField DataField="ProductName" HeaderText="ProductName" SortExpression="ProductName" />
<asp:BoundField DataField="CategoryID" HeaderText="CategoryID" SortExpression="CategoryID" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>

数据库连接字串:

CODE: