複選框從gridview1到gridview2的選定行ASP.NET C＃

Question

正如標題所說，無論如何我有一個表是sql-server產品。

它有產品ID，名稱，價格和cetegory。

我所做的是我得到數據到第一GridView類別明智，我想要的是當我檢查特定行或多行並單擊選擇按鈕shuld顯示產品名稱和價格在第二個gridview。

但是它做的是覆蓋第二個gridview中先前選擇的項目的下一個選定項目，並顯示onlu一行不是多個選定的項目。

任何人都可以幫助我？

這裏是一個代碼

protected void Button1_Click(object sender, EventArgs e) 
    { 
     for (int i = 0; i < GridView1.Rows.Count; i++) 
     { 

      CheckBox chbox = GridView1.Rows[i].Cells[0].FindControl("CheckBox1") as CheckBox; 

      if (chbox.Checked == true) 
      { 
       string conn = ConfigurationManager.ConnectionStrings["Test_T3ConnectionString2"].ConnectionString; 
       SqlConnection con = new SqlConnection(conn); 
       string query = "select prod_name,price from products where prod_id = '" + GridView1.Rows[i].Cells[1].Text + "'"; 
       SqlCommand cmd = new SqlCommand(query, con); 
       SqlDataAdapter da = new SqlDataAdapter(cmd); 
       DataTable dt = new DataTable(); 
       da.Fill(dt); 

       GridView2.DataSource = dt; 
       GridView2.DataBind(); 
      } 

     } 
    } 

Answer 1

您綁定的網格太多次。

protected void Button1_Click(object sender, EventArgs e) { 
List<string> checkedIDs = new List<string>(); 

for (int i = 0; i < GridView1.Rows.Count; i++) { 

    CheckBox chbox = GridView1.Rows[i].Cells[0].FindControl("CheckBox1") as CheckBox; 

    if (chbox.Checked == true) 
    { 
     checkedIDs.Add("'" + GridView1.Rows[i].Cells[1].Text + "'"); 
    } 

} 


     string conn = ConfigurationManager.ConnectionStrings["Test_T3ConnectionString2"].ConnectionString; 
     SqlConnection con = new SqlConnection(conn); 
     string query = "select prod_name,price from products where prod_id in (" + string.Join(",", checkedIDs.ToArray()) + ")"; 
     SqlCommand cmd = new SqlCommand(query, con); 
     SqlDataAdapter da = new SqlDataAdapter(cmd); 
     DataTable dt = new DataTable(); 
     da.Fill(dt); 

     GridView2.DataSource = dt; 
     GridView2.DataBind(); 
}