Web Forms :: Creating Multiple UserControls At Runtime?
Mar 1, 2011I want to create several instances of a webcontrol on my web page each time the user clicks an 'add' button.
HTML
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c#
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Web Forms :: Creating Multiple Usercontrols In A Loop?
Mar 9, 2011I have a userControl with with two DDLs and two RBLs, and public properties to get/set the values. If I register the UC on a page it works fine....I can set/retrieve the values without a problem.
I need to create multiple UCs based on records I'm pulling from a dB, so I'm trying to instead create the UCs programmatically. I'm testing this by adding a reference to the control ("symptomBasic"), creating a placeholder ("ph1") on a page and then trying to populate it with the UCs in PageInit. (the parent page uses a master page)
Partial Class testUC
Inherits System.Web.UI.Page
Private myUC As ASP.symptomBasic
Protected Sub Page_init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
Dim i As Integer
For i = 1 To 3
myUC = CType(LoadControl("~/controls/symptom.ascx"), ASP.symptomBasic)
ph1.Controls.Add(myUC)
Next
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
End Sub
End Class
When I load the page, I get three UCs in a row, and they work properly on postback...i.e. all the values are preserved. Question is, how do I then find the controls on postback when I want to populate them with data or read the values back?
Let's say I know I returned 3 rows from the dB and created 3 UCs during pageInit...how do I then access those controls to read back the values provided by the user? I see that each control has an ID like: "ctl00_ContentPlaceHolder1_ctl01_cName", where each set of controls is "ctl00", "ctl01", etc.
Web Forms :: Adding Multiple Usercontrols Dynamically?
Sep 21, 2010I have a simple user control which contains a textbox and a dropdownlist. I need to add this control multiple times to my page then save the details to my db, validating each control. When they re-enter my page I need to load the user control for each record in the db populated with the data they entered. They can then edit the data, delete the row or add new rows.
I'm trying to find the cleanest most efficient way to accomplish this. I realise I would need to re-add the user controls after each postback re-populating the data. Would the best way be to add each row to an arraylist or list of type object, save it to the viewstate and re-add the controls with data on postback, or is there another method which would suit?
Keep State Of Multiple Usercontrols?
Jan 7, 2011I am generating instances of a UserControl and putting them in an UL. In my UserControl there is a button with an event. I want to ask how I can keep the state of the UserControls I generated so that they remain on the page after a postback and also to catch their events.
For i As Integer = 0 To lstFoo.Count - 1
Dim liFoo As New HtmlGenericControl("li")
Dim ucMyFoo As ucFoo = LoadControl("userControls/ucFoo.ascx")
liFoo.Controls.Add(ucMyFoo)
ucMyFoo.DoSomething()
ulFoo.Controls.Add(liFoo)
Next
Web Forms :: Creating Imagebutton Dynamically At Runtime?
Aug 5, 2010I have a requirement whereby one or more image buttons need to be created in a user control at runtime. The number of buttons is determined from a database where a user can add one or more rows that contain an image for each button, so if a user adds 3 images to a table, 3 image buttons are created. Ive used this code but I get an error at runtime
The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.
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this is the usercontrol aspx
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I basically want one or more buttons to render within the div in the usercontrol. Ive only got the code written for one button at the moment while I test the rendering, eventually they will be rendered in a loop of records taken from a database. Whats the best way to do this ?
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Jan 9, 2010I need to create aspx pages on the fly or at the runtime.I read that creating a template page and posting content to the page would be a solution, in a few posts in the forum. Can i get information on this method.
View 5 RepliesWeb Forms :: Runtime Creating Text Box According To Database Values
Aug 4, 2010i am creating some of the control at runtime according database values. problem is that when i click onto the button, if the text box is empty, the required field validator(genrated at runtime) show first time that the text box is empty. but one agin i click on to the button, it doest show any error messege and all of the control which i am genrating at run time are hiding when i see at the page source, no control is find there.
using System;
using System.Collections;
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 AjaxControlToolkit;
using click2install.controls;
public partial class FeebackForm_Client : System.Web.UI.Page
{
HtmlGenericControl table = new HtmlGenericControl("table");
DataSet ds = new DataSet();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
CreateForm();
}
}
public void CreateForm()
{
ds = DBManager.ExecuteDataset("[FeedBack_FeedbackDetail_get]");
for (int i = 1; i < ds.Tables[0].Columns.Count - 1; i = i + 4)
{
//CreateControl(txtAddress.Text.ToString(), txtAddressRun, false, false, txtAddressToolTip.Text, txtAddressWaterMark.Text);
string Name = ds.Tables[0].Rows[0][i].ToString().Replace(" ","");
if (Name != "")
{
TextBox txtControl = new TextBox();
//RequiredTextBox txtControl = new RequiredTextBox();
txtControl.ID = "txt" + Name;
txtControl.CausesValidation = true;
bool RequiredField;
bool ToolTip;
if (ds.Tables[0].Rows[0][i + 3].ToString() == "True")
{
RequiredField = true;
}
else
RequiredField = false;
if (ds.Tables[0].Rows[0][i + 1].ToString() != "")
{
ToolTip = true;
}
else
ToolTip = false;
string TooltipText = ds.Tables[0].Rows[0][i + 1].ToString();
string WaterMarkText = ds.Tables[0].Rows[0][i + 2].ToString();
CreateControl(Name, txtControl, RequiredField, ToolTip, TooltipText, WaterMarkText);
}
}
HtmlGenericControl tr = new HtmlGenericControl("tr");
HtmlGenericControl td1 = new HtmlGenericControl("td");
HtmlGenericControl td2 = new HtmlGenericControl("td");
HtmlGenericControl td3 = new HtmlGenericControl("td");
HtmlGenericControl td4 = new HtmlGenericControl("td");
Button btnInsertRun = new Button();
btnInsertRun.Text = btnSubmit.Text.ToString();
btnInsertRun.ValidationGroup = "Check";
td2.Controls.Add(btnInsertRun);
tr.Controls.Add(td1);
tr.Controls.Add(td2);
tr.Controls.Add(td3);
tr.Controls.Add(td4);
table.Controls.Add(tr);
pnlPreview.Controls.Add(table);
System.Threading.Thread.Sleep(500);
ScriptManager.RegisterStartupScript(this, GetType(), Guid.NewGuid().ToString(), "Hide();", true);
System.Threading.Thread.Sleep(500);
ScriptManager.RegisterStartupScript(this, GetType(), Guid.NewGuid().ToString(), "ShowAddDisability()", true);
}
public void btnInsertRun_Click(object sender, System.EventArgs e)
{
CreateForm();
//ds = DBManager.ExecuteDataset("[FeedBack_FeedbackDetail_get]");
//TextBox txt1,txt2,txt3,txt4,txt5=new TextBox();
//objBox2 = this.Page.FindControl("objBox2") as TextBox;
string ss = "txt" + ds.Tables[0].Rows[0][1].ToString();
//TextBox objTextBox = (TextBox)PnlControlPanel1.FindControl(strControlName);
TextBox txt1 = new TextBox();
txt1 = (TextBox)this.Page.FindControl("txt" + ds.Tables[0].Rows[0][1].ToString());
//txt1=this.pnlContainer.FindControl("txt"+ds.Tables[0].Rows[0][1].ToString()) as TextBox;
// txt2 = this.pnlContainer.FindControl("txt" + ds.Tables[0].Rows[0][5].ToString()) as TextBox;
// txt3 = this.pnlContainer.FindControl("txt" + ds.Tables[0].Rows[0][9].ToString()) as TextBox;
// txt4 = this.pnlContainer.FindControl("txt" + ds.Tables[0].Rows[0][13].ToString()) as TextBox;
// txt5 = this.pnlContainer.FindControl("txt" + ds.Tables[0].Rows[0][17].ToString()) as TextBox;
string fh = txt1.Text;
//DBManager.ExecuteNonQuery("Feedback_FeedbackInsert", ds.Tables[0].Rows[0][1].ToString(), txt1.Text,ds.Tables[0].Rows[0][5].ToString(), txt2.Text,ds.Tables[0].Rows[0][9].ToString(), txt3.Text,ds.Tables[0].Rows[0][13].ToString(), txt4.Text,ds.Tables[0].Rows[0][17].ToString(),
txt5.Text);
Response.Write("Ho Gya");
}
public void CreateControl(string Name, TextBox ControlID, bool RequiredField, bool Tooltip, string TooltipText, string WaterMarkText)
{
if (WaterMarkText == "")
WaterMarkText = Name;
HtmlGenericControl tr = new HtmlGenericControl("tr");
HtmlGenericControl td1 = new HtmlGenericControl("td");
HtmlGenericControl td2 = new HtmlGenericControl("td");
HtmlGenericControl td3 = new HtmlGenericControl("td");
HtmlGenericControl td4 = new HtmlGenericControl("td");
td1.InnerText = Name;
ControlID.ValidationGroup = "Check";
//ControlID.ValidatorMessage = Name + " is Required Field";
//ControlID.ValidatorDisplayType = ValidatorDisplay.Dynamic;
//ControlID.ValidatorEnableClientScript = true;
td2.Controls.Add(ControlID);
if (RequiredField == true)
{
//RequiredFieldValidator Valid = new RequiredFieldValidator();
//Valid.ID = "Valid" + Name;
//Valid.ControlToValidate = ControlID.ID.ToString();
//Valid.ErrorMessage = Name + " is Required Field";
//Valid.Text = "*";
//Valid.Display = ValidatorDisplay.Dynamic;
//Valid.EnableViewState = true;
//Valid.SetFocusOnError = true;
//Valid.Enabled = true;
//Valid.EnableClientScript = true;
//Valid.InitialValue = WaterMarkText;
//Valid.ValidationGroup = "Check";
//td3.Controls.Add(Valid);
}
if (Tooltip == true)
{
HtmlGenericControl span = new HtmlGenericControl("span");
//span.Attributes.Add("class", "hotspot");
span.Attributes.Add("onmouseout", "tooltip.hide();");
span.Attributes.Add("onmouseover", "tooltip.show('" + TooltipText + "');");
HtmlImage img = new HtmlImage();
img.Src = "info.png";
span.Controls.Add(img);
td4.Controls.Add(span);
}
//TextBoxWatermarkExtender WaterMark = new TextBoxWatermarkExtender();
//WaterMark.WatermarkText = WaterMarkText;
//WaterMark.EnableClientState = true;
//WaterMark.TargetControlID = ControlID.ID.ToString();
//WaterMark.Enabled = true;
//WaterMark.ID = "WaterMark" + Name;
//td1.Controls.Add(WaterMark);
tr.Controls.Add(td1);
tr.Controls.Add(td2);
tr.Controls.Add(td3);
tr.Controls.Add(td4);
table.Controls.Add(tr);
}
}
after rendring the page...
<div id="pnlContainer">
<table><tbody><tr><td>Email</td><td><input type="text" id="txtEmail" name="txtEmail"></td><td></td><td><span onmouseover="tooltip.show('Email');" onmouseout="tooltip.hide();"><img src="info.png"></span></td></tr><tr><td>FirstName</td><td><input type="text"
id="txtFirstName" name="txtFirstName"></td><td></td><td><span onmouseover="tooltip.show('First Name');" onmouseout="tooltip.hide();"><img src="info.png"></span></td></tr><tr><td>LastName</td><td><input type="text" id="txtLastName" name="txtLastName"></td><td></td><td><span
onmouseover="tooltip.show('Last Name');" onmouseout="tooltip.hide();"><img src="info.png"></span></td></tr><tr><td>City</td><td><input type="text" id="txtCity" name="txtCity"></td><td></td><td><span onmouseover="tooltip.show('City');" onmouseout="tooltip.hide();"><img
src="info.png"></span></td></tr><tr><td>Address</td><td><input type="text" id="txtAddress" name="txtAddress"></td><td></td><td><span onmouseover="tooltip.show('Address');" onmouseout="tooltip.hide();"><img src="info.png"></span></td></tr></tbody></table></div>
but after the click on to the button it shows only the container div..
<div id="pnlContainer"></div>
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[Code]....
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[Code]....
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Source Error:
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Source File: C:WindowsMicrosoft.NETFrameworkv2.0.50727Configmachine.config Line: 139
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[Code]....
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[Code]....
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[Code]....
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