How to create dynamic control in forms using asp.net web form
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User839733648 posted
Hi mazhar khan india,
According to your description, I suggest that you could use PlaceHolder to add controls dynamically.
I've made a sample on my side. And in my sample, I also add submiting the content in the textbox control by using ViewState.
Here is my code. Hope it will be helpful to you.
.Aspx
<form id="form1" runat="server"> <div> <asp:Button ID="AddControlButton" runat="server" Text="Add Control" OnClick="AddControlButton_Click"/> <br /> <asp:PlaceHolder ID="DynamicControlsHolder" runat="server"></asp:PlaceHolder> <br /> <br /> <asp:Button ID="Submit" runat="server" Text="Submit Form" OnClick="Submit_Click" /> <br /> <br /> Form Contents: <br /> <asp:Label ID="ContentMessage" runat="server"></asp:Label> </div> </form>Code behind.
private List<string> ControlsList { get { if (ViewState["controls"] == null) { ViewState["controls"] = new List<string>(); } return (List<string>)ViewState["controls"]; } } private int NextID { get { return ControlsList.Count + 1; } } protected override void OnPreInit(EventArgs e) { base.OnPreInit(e); } protected override void LoadViewState(object savedState) { base.LoadViewState(savedState); foreach(string txtxID in ControlsList) { TextBox txt = new TextBox(); txt.ID = txtxID; DynamicControlsHolder.Controls.Add(txt); DynamicControlsHolder.Controls.Add(new LiteralControl("<br />")); } } protected void Page_Load(object sender, EventArgs e) { } protected void AddControlButton_Click(object sender, EventArgs e) { TextBox txt = new TextBox(); txt.ID = "TextBox" + NextID.ToString(); DynamicControlsHolder.Controls.Add(txt); DynamicControlsHolder.Controls.Add(new LiteralControl("<br />")); ControlsList.Add(txt.ID); } protected void Submit_Click(object sender, EventArgs e) { StringBuilder sb = new StringBuilder(); foreach (Control ctl in DynamicControlsHolder.Controls) { if(ctl is TextBox) { TextBox txt = ctl as TextBox; if (ctl != null) { sb.Append(txt.ID); sb.Append(":"); sb.Append(txt.Text); sb.Append("<br/>"); } } } ContentMessage.Text = sb.ToString(); }Result:
Best Regards,
Jenifer
