Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

How to use user control in a repeater

Posted on 2009-07-15
2
401 Views
Last Modified: 2013-11-05
I have created a user control in ASP.NET that contains 11 different gridviews, each intended to display a different set of people (like a depth chart).  I also have a dropdownlist with 30 items, where each item would have different people in the gridview.  How does one go about using the repeater control to accomplish this?

Adding to the fun:  In the codebehind for the control, I am doing formatting on each entry based upon certain criteria (basically, changing the font color if certain conditions are met).
0
Comment
Question by:houstonastros
2 Comments
 
LVL 20

Accepted Solution

by:
ddayx10 earned 125 total points
ID: 24865405
1) Setup a databinding routine for your gridview(s)
2) Set dropdownlist property autopostback=true
3) Add selectedindexchanged event to dropdownlist
4) In selectedindexchanged event use the value and/or text to get new data and re-bind to gridview(s).

There's a sample that does that here:
http://www.experts-exchange.com/Programming/Languages/.NET/Q_24481708.html

I'll also past the code below (see snippet).
****ASPX PAGE (could just as easily be ASCX page)****
<!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>Untitled Page</title>
</head>
<body>
	<form id="form1" runat="server">
	<span>New Title: </span>
	<asp:TextBox ID="txtTitle" runat="server" />
	<asp:Button ID="Button1" runat="server" Text="Add Record" OnClick="Button1_Click" />
	<span>Adds a record to the database.</span>
	<p style="margin: 5px 0px; padding: 0px;">
		Dropdown bound to available id values in database table.</p>
	<asp:DropDownList ID="ddl1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddl1_SelectedIndexChanged">
	</asp:DropDownList>
	<p style="margin: 5px 0px; padding: 0px;">
		GridView shows items with id equal to dropdownlist selected value.</p>
	<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="true">
	</asp:GridView>
	
	</form>
</body>
</html>
 
 
****CODE BEHIND****
using System.Data.SqlClient;
 
public partial class Default4 : System.Web.UI.Page
{
    public string connStr
    {
        get
        {
            string conn = ConfigurationManager.ConnectionStrings["conn"].ToString();
            return conn;
 
        }
    }
 
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            bindToDDL();
            bindToGrid();
        }
 
 
    }
 
    protected void ddl1_SelectedIndexChanged(object sender, EventArgs e)
    {
        bindToGrid();
    }
 
    private void bindToDDL()
    {
        SqlConnection conn = new SqlConnection(connStr);
        SqlCommand cmd = new SqlCommand("SELECT catID,title FROM roLIST", conn);
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        ddl1.DataTextField = "title";
        ddl1.DataValueField = "catID";
        ddl1.DataSource = dr;
        ddl1.DataBind();
        dr.Close();
        conn.Close();
        conn.Dispose();
        
    }
 
 
    private void bindToGrid()
    {
        SqlConnection conn = new SqlConnection(connStr);
        SqlCommand cmd = new SqlCommand("SELECT * FROM roLIST WHERE catID = @choice",conn);
        cmd.Parameters.Add(new SqlParameter("@choice", Convert.ToInt32(ddl1.SelectedValue)));
        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        GridView1.DataSource = dr;
        GridView1.DataBind();
        dr.Close();
        conn.Close();
        conn.Dispose();
    }
 
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection conn = new SqlConnection(connStr);
        SqlCommand cmd = new SqlCommand("INSERT INTO roLIST (title, listOrder) VALUES(@title, @listOrder)", conn);
        cmd.Parameters.Add(new SqlParameter("@title", txtTitle.Text.ToString()));
        cmd.Parameters.Add(new SqlParameter("@listOrder", Convert.ToInt32(ddl1.Items.Count)+1));
        conn.Open();
        cmd.ExecuteNonQuery();
        conn.Close();
        conn.Dispose();
        bindToDDL();
        bindToGrid();
 
    }
}

Open in new window

0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Today is the age of broadband.  More and more people are going this route determined to experience the web and it’s multitude of services as quickly and painlessly as possible. Coupled with the move to broadband, people are experiencing the web via …
Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question