Question

您好先生我想使用复选框aur复选框列表搜索数据，如果我选择两个复选框然后我想获取复选框ID的数据，此代码一次只给我一个数据。请给我一个这种查询的演示代码。

private void checkboxlistbind（） {

    SqlConnection con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Users\\FlagBits\\Documents\\Visual Studio 2010\\WebSites\\checkboxlist\\App_Data\\Database.mdf;Integrated Security=True;User Instance=True");
    con.Open();
    string query = "select * from student where id='" + CheckBox1.Text + "'";
    SqlCommand cmd = new SqlCommand(query, con);
    SqlDataReader dr;
    dr = cmd.ExecuteReader();
    GridView1.DataSource = dr;
    GridView1.DataBind();



}
private void checkboxlistbind2()
{

    SqlConnection con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Users\\FlagBits\\Documents\\Visual Studio 2010\\WebSites\\checkboxlist\\App_Data\\Database.mdf;Integrated Security=True;User Instance=True");
    con.Open();
    string query = "select * from student where id='" + CheckBox2.Text + "'";
    SqlCommand cmd = new SqlCommand(query, con);
    SqlDataReader dr;
    dr = cmd.ExecuteReader();
    GridView1.DataSource = dr;
    GridView1.DataBind();

}


protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{



    if (CheckBox1.Checked == true)
    {
        checkboxlistbind();
    }

}
protected void CheckBox2_CheckedChanged(object sender, EventArgs e)
{
    if (CheckBox2.Checked == true)
    {
        checkboxlistbind();
        checkboxlistbind2();
    }

Answer 1

您需要遍历您的复选框列表并测试每个项目的选定值，并构建包含每个选项的字符串。

    string queryparam = '';
      for (int i=0; i<checkboxlist1.Items.Count; i++) {
         if (checkboxlist1.Items[i].Selected)
            {  queryparam  += (queryparam.Length = 0) ? "id = " + checkboxlist1.Items[i].Text : " or id = "  checkboxlist1.Items[i].Text }
      }

这应该让你有一个想法开始。

使用电子商务网站的复选框列表从数据库中搜索数据

1 个答案: