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POUnable to get the value entered by user on button click event , value is entered in a dynamically loaded textbox
 

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  1. POUnable to get the value entered by user on button click event , value is entered in a dynamically loaded textbox
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    <p>I have few textboxes on a page which are loaded dynamically on change of text in dropdownlist. The user enters values in these textboxes and clicks on a addnewitem button. In the code behind I want to capture the values entered in these textboxes. But I get the value as empty.</p> <p>On Pageload mthd there is nothing which is referencing to createdynamiccontrols method.Then I have </p> <pre><code> protected override void CreateChildControls() { base.CreateChildControls(); CreateDynamicControls(); } protected override void OnLoad(EventArgs e) { base.OnLoad(e); } protected override object SaveViewState() { return new Pair(base.SaveViewState(), null); } protected override void LoadViewState(object savedState) { base.LoadViewState(((Pair)savedState).First); EnsureChildControls(); } public void CreateDynamicControls() { Student= ddlStudentschool.SelectedItem.Text.ToString(); studentcollege= ddlstudentcollege.SelectedValue.ToString(); int rowPos = 0; DynPanel.BorderStyle = BorderStyle.Solid; </code></pre> <p>Based on the selected of studentschool and studentcollege, the following textboxes &amp; fieldnames will be created</p> <pre><code> Label Mynewlabel = new Label(); Mynewlabel.ID = "lbl" + FldLabel; Mynewlabel.Text = FldLabel; Mynewlabel.Visible = true; Mynewlabel.Font.Bold = true; DynPanel.Controls.Add(new LiteralControl("&lt;td bgcolor=#333&gt;")); DynPanel.Controls.Add(Mynewlabel); DynPanel.Controls.Add(new LiteralControl("&lt;/td&gt;")); if (ControlType == "TextBox") { int textBoxLength; TextBox MynewTextBox = new TextBox(); MynewTextBox.ID = "txt" + Fldname; MynewTextBox.Width = 100; MynewTextBox.EnableViewState = true; MynewTextBox.Enabled = true; did not paste the whole code } protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e) { CreateDynamicControls(); } protected void btnAddItem_Click(object sender, EventArgs e) { CreateDynamicControls(); if (DynPanel.Controls != null) { foreach (Control ctrl in DynPanel.Controls) { if (ctrl is TextBox) { TextBox _txt = DynPanel.FindControl(ctrl.ID) as TextBox; int count = DynPanel.Controls.Count; // txtresult.ID = ctrl.ID; txtresult.Text = ((TextBox)ctrl).Text; TextBox txtPath = (TextBox)ctrl.FindControl(""); string result = txtresult.Text; } </code></pre> <p>Firstly i am getting object reference not set to an instance of an object when the createchildcontrols method is called the second time and also if I dont have the createdynamiccontrols method in additem click event, controls are no longer tehre...</p>
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    1. USJanaki
    1. USJanaki
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    1. COAre you sure you're not setting `txtresult.Text` and then clearing it with subsequent iterations?
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      1. POUnable to get the value entered by user on button click event , value is entered in a dynamically loaded textbox
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    2. CO@Edmondson , i am not clearing teh txtresult.Text on subsequent iterations.
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      1. POUnable to get the value entered by user on button click event , value is entered in a dynamically loaded textbox
      1. USJanaki
    3. CO@Edmonson, my scenario is ondropdownselectedindex changed i need to load the controls dynamically based on the dropdown selection, and teh dynamic controls need to be there when I click on Add new Item button. However, I see that I called the method in both dropdowneventselection and Additembutton click event, so when I click on addnew item due to postback, my values are getting refreshed. But, if I dont call the loaddynamiccontrols method in Additembutton click event there are no controls on the page. How do I deal with this. PLease help me.
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      1. POUnable to get the value entered by user on button click event , value is entered in a dynamically loaded textbox
      1. USJanaki
 

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