使用DataAdapter填充多個表(利用DataRelation)的執行個體代碼

最後更新：2018-12-08 來源：互聯網

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Default.aspx

複製代碼代碼如下:View 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">

</div>
<asp:Label ID="lbText" runat="server"></asp:Label>
</form>
</body>
</html>

Default.aspx.cs

複製代碼代碼如下:

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

using System.Data.SqlClient;
using System.Text;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string connectionString = ConfigurationSettings.AppSettings["strCon"];
SqlConnection mycon = new SqlConnection(connectionString);//建立資料庫連接
string sqlCategory = "select ID,C_Name from Photo_Category";//查詢相簿分類表中資訊
string sqlPhoto = "select CategoryID,Title from Photo";//查詢相簿表中資訊
SqlDataAdapter da = new SqlDataAdapter(sqlCategory, mycon);//建立資料配接器
DataSet ds = new DataSet();//建立資料集
try
{
if (mycon.State.Equals(ConnectionState.Closed))
{ mycon.Open(); }//顯式地開啟資料庫連接
da.Fill(ds, "Photo_Category");//填充相簿分類表
da.SelectCommand.CommandText = sqlPhoto;
da.Fill(ds, "Photo");//填充相簿資訊表
}
finally
{
mycon.Close();//顯式地關閉資料庫連接
}
//建立DataRelation對象，關聯表間關係
DataRelation relat = new DataRelation("Photo_Category", ds.Tables["Photo_Category"].Columns["ID"],ds.Tables["Photo"].Columns["CategoryID"]);
ds.Relations.Add(relat);//添加表間關係
StringBuilder builder = new StringBuilder("");
foreach (DataRow row in ds.Tables["Photo_Category"].Rows)
{
builder.Append("<b>");
builder.Append(row["C_Name"].ToString());
builder.Append("</b><ul>");
DataRow[] childRows = row.GetChildRows(relat);
foreach (DataRow childRow in childRows)
{
builder.Append("<li>");
builder.Append(childRow["Title"].ToString());
builder.Append("</li>");
}
builder.Append("</ul>");
}
lbText.Text += builder.ToString();//將運行結果輸出到頁面中
}

}

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使用DataAdapter填充多個表(利用DataRelation)的執行個體代碼

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