How can I use text property of dynamic created textfield? - c#

I have this code, which dynamically creates some textfields for me. k is taken from user btw.
for (int i = 0; i < k; i++)
{
TextBox t1 = new TextBox();
t1.Parent = groupBox2;
t1.Left = textBox2.Left;
t1.Top = textBox2.Top + (i + 1) * 40;
t1.Name = "text" + (i + 1);
t1.Enabled = true;
groupBox2.Controls.Add(t1);
}
What i want to do is, after this creating phase is done, when the user presses groupbox2's "OK" button, I want to take the created textfields' text properties, but so far I don't know how could this be done, since I gave textfields a name, I tried this but didn't work.
private void button3_Click(object sender, EventArgs e)
{
node1.name = textBox2.Text;
for (int i = 0; i < k; i++)
{
node1.array[i] = Convert.ToInt32("text"+(i+1).Text);
}
}
Any help would be nice, thanks.


Try this method:
private void button3_Click(object sender, EventArgs e)
{
node1.name = textBox2.Text;
for (int i = 0; i < k; i++)
{
TextBox txtBox = (TextBox)groupBox2.FindControl("text" + (i + 1));
if (txtBox != null)
{
node1.array[i] = txtBox.Text;
}
}
}


Loop through your text boxes in groupBox1 and get their names,Try this:
List<string> TextBoxesName=new List<string>();
foreach (Control item in groupBox1.Controls)
{
if (item is TextBox)
{
TextBoxesName.Add((item as TextBox).Text);
}
}


Set to your dynamic texboxes ID and than you can do groupBox2.FindControl("dynamic_texbox_id") to get your text box


Easiest solution is to put your listboxes in a collection of some sort
List<ListBox> listboxes = new List<ListBox>();
for (...)
{
...
listboxes.add(listbox);
}
Then you can refer back to them whenever you want
Or since you're adding them to a groupbox, why not go through that collection?

Related

values a re not being displayed in TextBox

in this program, when the Recall button (recallBtn_Click()) is clicked, it calls a method (that calculates directions) from another class which should then call the showPath() method. the show path method should then display its output in a textBox. But the values don't show even though i can see from debugging that the values are being sent to the text box. can anybody tell me where i went wrong?
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
storeRetSelect.SelectedIndex = 0;
PrioritySelect.SelectedIndex = 0;
}
public void showPath(List<PathFinderNode> mPath)
{
var T = new Form1().directionsTextBox;
foreach (PathFinderNode node in mPath)
{
if ((node.X - node.PX) > 0) { T.Text += "Right" + System.Environment.NewLine ; }
if ((node.X - node.PX) < 0) { T.Text += "Left" + System.Environment.NewLine; }
if ((node.Y - node.PY) > 0) { T.Text += "UP" + System.Environment.NewLine; }
if ((node.Y - node.PY) < 0) { T.Text += "Down" + System.Environment.NewLine; }
}
}
private void recallBtn_Click(object sender, EventArgs e)
{
var path = new pathPlan();
string desigString = inputTextBox.Text;
int[] desig = new int[3];
for (int i = 0; i < desigString.Length; i++) { desig[i] = (int)char.GetNumericValue(desigString[i]); }
path.Recall(desig[1], desig[2], (-1) * desig[0]);
}
}

With this line you are initialising a new object and get the reference of the textbox there.
var T = new Form1().directionsTextBox;
But I assume you want to use the textbox of the form which is allready open. Change the line to the following to access the textbox of the current object.
var T = this.directionsTextBox;

how to edit the text of combobox from another view c# wpf

I have three combobx for time and I want to edit the text of this comboboxes from another view this is the code for combobpx view
public partial class Combo : Window
{
public Combo()
{
InitializeComponent();
}
private void hrComboBox_Loaded(object sender, RoutedEventArgs e)
{
List<string> hours = new List<string>();
for (int i = 0; i <= 24; i++)
{
if (i < 10)
hours.Add("0" + i);
else
hours.Add(i + "");
}
var comboBox = sender as ComboBox;
comboBox.ItemsSource = hours;
comboBox.SelectedIndex = 0;
}
private void MinComboBox_Loaded(object sender, RoutedEventArgs e)
{
List<string> Minutes = new List<string>();
for (int i = 0; i <= 60; i++)
{
if (i < 10)
Minutes.Add("0" + i);
else
Minutes.Add(i + "");
}
var comboBox = sender as ComboBox;
comboBox.ItemsSource = Minutes;
comboBox.SelectedIndex = 0;
}
private void SecComboBox_Loaded(object sender, RoutedEventArgs e)
{
List<string> Seconds = new List<string>();
for (int i = 0; i <= 60; i++)
{
if (i < 10)
Seconds.Add("0" + i);
else
Seconds.Add(i + "");
}
var comboBox = sender as ComboBox;
comboBox.ItemsSource = Seconds;
comboBox.SelectedIndex = 0;
}
private void OKButton_Click(object sender, System.Windows.RoutedEventArgs e)
{
DialogResult = true;
}
the second view invokes this view as dialog my problem is when I add the text to one of this comboboxes the text isn't set and still "00" the code I use as follows:
var dialog = new Combo();
string[] timeArr = delay.Split(':');
//here is my problem when the dialog is loading the text
//of three comboboxes isn't change
dialog.hr.Text = timeArr[0];
dialog.Min.Text = timeArr[1];
dialog.Sec.Text = timeArr[2];
if (dialog.ShowDialog() == true)
{
string time = dialog.hr.Text+":"+dialog.Min.Text+":"+dialog.Sec.Text;
delay = time;
nextDelay = time;
}
anyone help me, thanks :)

How to fetch data from dynamically created textboxes (windows application)

I have used the below code to dynamically create textboxes by giving the total number of textboxes initially. After i enter values to these textboxes, how can i fetch the values from it. Like if i give count as 3, 3 textboxes will be created. Now, i enter data to each textbox. How can i read the values i entered into these texboxes.
int a = 1;
public Form1()
{
InitializeComponent();
}
public System.Windows.Forms.TextBox AddNewTextBox()
{
System.Windows.Forms.TextBox txt = new System.Windows.Forms.TextBox();
this.Controls.Add(txt);
txt.Top = a * 25;
txt.Left = 100;
txt.Name = "txt" + this.a.ToString();
txt.Text = "TextBox " + this.a.ToString();
a = a + 1;
return txt;
}
private void button1_Click(object sender, EventArgs e)
{
int i;
int count = Int16.Parse(counttxt.Text.ToString());
for (i = 1; i <= count; i++)
{
AddNewTextBox();
}
}

Hold a reference to the dynamically generated TextBox in a variable of type array or list.
Beside that if u want the value from TextBox that was named txt1
string value = this.Controls["txt1"].Text

string allTextBoxValues = "";
foreach (Control childc in Controls) {
if (childc is TextBox && childc.Name.Contains("txt"))
allTextBoxValues += ((TextBox)childc).Text + ",";
}

String to Textbox

I have created a method that allows me to find the next empty Box:
public int CheckBox(int boxNum) {
int BoxNumber = 0;
TextBox[] itemBoxArray = new TextBox[] { itemBox0, itemBox1, itemBox2, itemBox3, itemBox4, itemBox5, itemBox6, itemBox7,
itemBox8, itemBox9,itemBox10,itemBox11,itemBox12,itemBox13,itemBox14,itemBox15,};
for (int i = 0; i < itemBoxArray.Length; i++)
{
if (String.IsNullOrEmpty(itemBoxArray[i].Text))
{
BoxNumber = i;
i = 15;
}
}
return BoxNumber;
}
Next i created a button to check what the empty box is and i would like to input something into this box but i cannot find a way ro convert the string that carries the empty box number to that text box:
private void StandAroundRebar_Click(object sender, EventArgs e)
{
int emptybox = CheckBox(0);
string emptyboxString = emptybox.ToString();
string newbox = "itemBox" + emptyboxString;
MessageBox.Show("TextBox # " + newbox + " is empty ");
var textbox = this.Controls.Find(newbox, true);
}
}
}

Well, I would rather change the CheckBox method
public TextBox CheckBox() {
var itemBoxArray = new TextBox[] { itemBox0, itemBox1, itemBox2, itemBox3, itemBox4, itemBox5, itemBox6, itemBox7,
itemBox8, itemBox9,itemBox10,itemBox11,itemBox12,itemBox13,itemBox14,itemBox15,};
return itemBoxArray.First(m => string.IsNullOrEmpty(m.Text));//or FirstOrDefault
}
now you would get a TextBox returned, and could do whatever you want with it.

You need this function:
http://msdn.microsoft.com/de-de/library/486wc64h(v=vs.110).aspx
This will find it, all you have to do is casting it.
Then:
BoxNumber = i;
i = 15;
What should that do? You set the i to the box number and then you set it again to 15?!
That isn't supposed to work.

Why not just return the TextBox object directly?
public TextBox GetNextEmptyTextBox()
{
return (new[] { textBox1, textBox2, textBox3 })
.FirstOrDefault(tb => string.IsNullOrEmpty(tb.Text));
}

You need Control.ControlCollection.Find and than a cast to TextBox.
TextBox newBox = this.Controls.Find("itemBox1", true).FirstOrDefault() as TextBox;
Once you find your Box you can set the text:
newBox.Text = "my text";

dynamic text box and append and save them to sql server DataBase

HI I have requirement that
1) display given no.of textboxes dynamically and save to DB
2) if I change the number then new textboxes should append to UI
EX: TextBox AddButton
If I give 2 in textbox and click on add
Then 2 textboxes should appear. I filled some data in those textboxes. Now When I change the value 2 to 5 then 3 more textboxes should append(condition:old textboxes data should retain)
If the second value is less than or equal to first value then do nothing.
My code is
void Append()
{
string Data = string.Empty;
TextBox tb;
if (Convert.ToInt32(hdnCnt.Value) < Convert.ToInt32(txtNoofGames.Text))
{
for (int i = 0; i < Convert.ToInt16(txtNoofGames.Text); i++)
{
if (i <= Convert.ToInt32(hdnCnt.Value))
{
tb = (TextBox)Form.FindControl("txtGame1");
Data = tb.Text;
}
TextBox Newtb = new TextBox();
Newtb.ID = "txtGame" + i;
Form.Controls.Add(Newtb);
if (i <= Convert.ToInt32(hdnCnt.Value))
{
Newtb.Text = Data;
}
}
}
}
protected void btnAdd_Click(object sender, EventArgs e)
{
if (hdnCnt.Value != "")
Append();
hdnCnt.Value = txtNoofGames.Text;
for (int i = 0; i < Convert.ToInt16(txtNoofGames.Text); i++)
{
TextBox tb = new TextBox();
tb.ID = "txtGame" + i;
Form.Controls.Add(tb);
}
}
I am getting exception "object reference not set to an instance of object" at Data = tb.Text; in append method.

You didn't initialize it from the looks of it
TextBox tb = new TextBox();
Hope that helps,

Instead of Form.Controls.Add(tb);
Please try with Page.Form.Controls.Add(tb);

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