Databases
StackOverflow2013
Postsdbo
POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
    primarykey
    data
    text
    <p>I have code that windows form starts with only 1 <code>Label</code> and 1 <code>TextBox</code>, when user starts to type on <code>TextBox1</code>,It creates a new TextBox and label down (also change location of 2 <code>Buttons</code> and change windows form size,It happens to max of 10 text box + 10 labels (side-side) like:</p> <pre><code>(label1) Enter Name 1: - Textbox1 Imput (label2) Enter Name 2: - Textbox2 Imput (label1) Enter Name 3: - Textbox3 Imput ... </code></pre> <p>It works great, but have a little "problem":</p> <ul> <li>my code creates a new <code>TextBox</code>/<code>Label</code> when user starts to type on last <code>TextBox</code></li> <li>if the user stops on <code>Textbox7</code> for example, my code will have created <code>TextBox8</code> although it is not needed and does not contain text (is blank), </li> <li>therefore I would like <code>Delete</code> it automatically if the user tabs from <code>TextBox7</code> to <code>TextBox8</code> and leaves <code>TextBox8</code> (without entering text into tb8)</li> </ul> <p>My code isn't working perfectly (will explain below) and if I click on <code>Button</code> that will verify if last <code>TextBox</code> text is <code>Empty</code> and if it is, will <code>Delete</code> text box and label at side and changes localization for <code>Buttons</code> and windows form size). </p> <p>I have too many problems because <code>TextBox</code> 2 to 10 are created at runtime and its not possible to reference these "future" <code>TextBox</code> in code because I get error saying that it not exist in actual code.</p> <p>Problem of <code>TextBox</code> and label <code>Delete</code> on <code>TextBox</code> focus leave when <code>TextBox.Text</code> is <code>Empty</code> is that it work great if I focus in another place in my focus using mouse click but if I press tab it <code>Delete</code> 2 <code>TextBox</code> and crash and return error: The index 12(can be any number) is out of range.</p> <p>See my code to create new <code>TextBox</code> and labels + resize form and windows form size on txtNomecategoria_TextChanged:</p> <pre><code>public partial class cad_produto_acessorios_novo : Form { string testelogico; int c; int n = 1; int n2 = 25; int n3 = 65; int n4 = 57; int n5 = 152; public cad_produto_acessorios_novo() { InitializeComponent(); } private void txtNomecategoria_TextChanged(object sender, EventArgs e) { if (txtNomecategoria.TextLength &gt; 1) { n++; if (n &lt;= 1) { n = 2; } if (n &gt;= 1 &amp;&amp; n &lt;= 2) { n2 = n2 + 30; n3 = n3 + 30; n4 = n4 + 30; n5 = n5 + 30; gpbCategoria.Size = new System.Drawing.Size(283, n4); this.Height = n5; btnApagar.Location = new Point(108, n3); btnSalvar.Location = new Point(212, n3); TextBox txt = new TextBox(); txt.Name = "txtAcessorio" + n; txt.Text = ""; txt.Size = new System.Drawing.Size(189, 26); txt.Location = new Point(87, n2); testelogico = txt.Name; gpbCategoria.Controls.Add(txt); txt.TextChanged += new EventHandler(new_onchange); txt.Leave += new EventHandler(erase_onLeave); Label lbl = new Label(); lbl.Name = "lblAcessorio" + n; lbl.Text = "Acessório Nº" + n + ":"; lbl.Location = new Point(4, n2 + 5); gpbCategoria.Controls.Add(lbl); } else { n--; } } } </code></pre> <p>note that it create 2 new event for new runtime created <code>TextBox</code>: </p> <pre><code>txt.TextChanged += new EventHandler(new_onchange); txt.Leave += new EventHandler(erase_onLeave); </code></pre> <p>So here we go (create new <code>TextBox/Label</code> + resize windowsform,etc):</p> <pre><code>void new_onchange(object sender, EventArgs e) { cadeianovoscampos(sender as TextBox, e); } private void cadeianovoscampos(TextBox _text, EventArgs e) { n++; if (_text.Text != null) { if (_text.Name == "txtAcessorio2") { c = 3; } else { if (_text.Name == "txtAcessorio3") { c = 4; } else { if (_text.Name == "txtAcessorio4") { c = 5; } else { if (_text.Name == "txtAcessorio5") { c = 6; } else { if (_text.Name == "txtAcessorio6") { c = 7; } else { if (_text.Name == "txtAcessorio7") { c = 8; } else { if (_text.Name == "txtAcessorio8") { c = 9; } else { if (_text.Name == "txtAcessorio9") { c = 10; } } } } } } } } if (n &gt;= 1 &amp;&amp; n &lt;= c) { n2 = n2 + 30; n3 = n3 + 30; n4 = n4 + 30; n5 = n5 + 30; gpbCategoria.Size = new System.Drawing.Size(283, n4); this.Height = n5; btnApagar.Location = new Point(108, n3); btnSalvar.Location = new Point(212, n3); TextBox txt = new TextBox(); txt.Name = "txtAcessorio" + n; txt.Text = ""; txt.Size = new System.Drawing.Size(189, 26); txt.Location = new Point(87, n2); gpbCategoria.Controls.Add(txt); testelogico = txt.Name; btnSalvar.Tag = 2; txt.TextChanged += new EventHandler(new_onchange); txt.Leave += new EventHandler(erase_onLeave); Label lbl = new Label(); lbl.Name = "lblAcessorio" + n; lbl.Text = "Acessório Nº" + n + ":"; lbl.Location = new Point(4, n2 + 5); gpbCategoria.Controls.Add(lbl); } else { n--; } } } </code></pre> <p>And delete <code>TextBox/Labels</code> + resize windowsform,etc on Textbox focus leave (if Empty): </p> <pre><code>void erase_onLeave(object sender, EventArgs e) { cadeiaapagarcampos(sender as TextBox, e); } private void cadeiaapagarcampos(TextBox _text, EventArgs e) { if (_text.Text == "") { n--; if (gpbCategoria.Controls.Count &lt; 4) { } else { if (n &gt;= 1 &amp;&amp; n &lt;= 10) { n2 = n2 - 30; n3 = n3 - 30; n4 = n4 - 30; n5 = n5 - 30; int count = gpbCategoria.Controls.Count - 2; gpbCategoria.Size = new System.Drawing.Size(283, n4); this.Height = n5; btnApagar.Location = new Point(108, n3); btnSalvar.Location = new Point(212, n3); gpbCategoria.Controls.Remove(_text); gpbCategoria.Controls.RemoveAt(count); } } } } </code></pre> <p>Its really to hard explain all, because code is big and its only possible solve problem if person know how code work. If I need add any additional information, only ask for that, its near, but with your help I can try to make it work. </p> <hr> <p>Fast summary (can try hehe)</p> <p>I want fix: 1 - <code>Delete</code> current <code>TextBox</code> and side <code>Label</code> created on runtime if <code>Focus</code> leave current <code>TextBox</code> (if <code>.Text</code> is <code>Empty</code>): It works only if I Focus leave using mouse click on any part of windows form, but if i use tab on <code>TextBox</code> to <code>Focus</code> leave, it just not works, crash and return error. 2 - Add <code>Button</code> Save Function to check if last <code>TextBox</code> created is Empty or not and if it, it will <code>Delete</code> last created in runtime <code>TextBox/Label</code> (side-side), resize windows form and change <code>Button</code> localization (can use current <code>Delete</code> code that I developed to make these changes)</p> <p>That's it, but I know that its big and hard to understand, I will try but its really big and its impossible understand/fix without know how entire code works.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USfelipe Salomao
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
      1. This table or related slice is empty.
      1. VTDownMod
    1. COHoly wall of text. Can you please try to narrow down your problem & question?
      singulars
      1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
      1. UStnw
    2. COI think you're going about this in the wrong way. From what I can tell, you should probably be using a grid or list control to hold the values, then you can back them by collections with your data in it and you won't have to deal with these nested ifs and complicated eventing.
      singulars
      1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
      1. USkettch
    3. COCreate a List<Label> and a List<TextBox> at the Form level so you can keep references to what has been created, and know exactly how many of them there are. It would make more sense to create a UserControl to encapsulate the Label and TextBox together into one unit.
      singulars
      1. POAutomatically delete TextBox and label if TextBox.Text = Empty on focus leave
      1. USIdle_Mind
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload