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Maintain control Values after PostBack

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Posts: 3

Reputation: Adzz is an unknown quantity at this point

Solved Threads: 0

Adzz

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Newbie Poster

Maintain control Values after PostBack

Jul 4th, 2006

have to create a number of controls equal to a number entered in a textbox by the user. I created a web user control, which has a radio button list. Then when the user press a Submit button, I want to check the selected values of the controls created dynamically, but the problem is that they are lost on post-back.

I managed with the aid of an article I read on the net (http://www.tgreer.com/aspnet_html_04.html), to maintain the controls created dynamically after post back, but still one problem I have is the values the user enters in the dynamically created controls are lost after post back.

Here is my code:

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
 
publicpartialclassquestions : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState.Add("mode", "0");
}
}
protected override void LoadViewState(object savedState)
{
base.LoadViewState(savedState);
if (ViewState["mode"].ToString() == "1")
{
if (TextBox1.Text != "")
{
for (int i = 0; i < int.Parse(TextBox1.Text); i++)
{
CreateControls(i);
}
}
}
}
///<summary>
/// Calls the function "CreateControls" which creates a number of controls based on the number eneterd in the TextBox.
///</summary>
///<param name="sender"></param>
///<param name="e"></param>
protected void BTN_Submit_Click(object sender, EventArgs e)
{
if (TextBox1.Text != "")
{
for (int i = 0; i < int.Parse(TextBox1.Text); i++)
{
CreateControls(i);
}
}
}
///<summary>
/// Checks the values entered by the user and calculates the total result.
///</summary>
///<param name="sender"></param>
///<param name="e"></param>
protected void BTN_Result_Click(object sender, EventArgs e)
{
if (TextBox1.Text != "")
{
for (int i = 0; i < int.Parse(TextBox1.Text); i++)
{
CreateControls(i);
}
}
ViewState.Add("mode", "1");
//check results of entered by user
/*int result = 0;
for (int i = 0; i < int.Parse(TextBox1.Text); i++)
{
bool ans = ((ASP.mcq_ascx)(this.Q_PlaceHolder.FindControl("newc" + i))).CheckAnswer();
if (ans)
{
result++;
}
}
Response.Write(result);*/
}
///<summary>
/// Creates controls dynamically to the page.
///</summary>
protected void CreateControls(int i)
{
ASP.mcq_ascx newc = new ASP.mcq_ascx();
newc.ID = "newc" + i.ToString();
this.Q_PlaceHolder.Controls.Add(newc);
}
}