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How to assign value to text box control inside the table column in C# coding file?

I am creating asp.net web form. in that i am creating dynamic tables in which particular column is numeric text box control.
i don't know how to assign and get values from the text box control.. my coding as follow..
for (int i = 0; i < my_DataTable.Rows.Count; i++)
{
HtmlTableRow _Row = new HtmlTableRow();
HtmlTableCell Col = new HtmlTableCell();
Col.InnerText = my_DataTable.Rows[i]["itmCode"].ToString();
_Row.Controls.Add(Col);
Col = new HtmlTableCell();
_Row.Controls.Add(Col);
Col.InnerHtml = "<input type='number' value='0'>";
_Row.Controls.Add(Col);
my_Table.Rows.Add(_Row);
}
In a paricular method, i need to assign the value to the text box control also needs to get the value existing value.. so i try follow as below
var no_1 = my_Table.Rows[0].Cells[1].InnerText;
If i check the no_1, it has the textbox, but i don't know how to access the current value and assign new value..
can anyone help me how to achieve this..

One thing you have to keep in mind while working with Dynamic Controls is that whenever a postback has occurred you will lose the dynamically created controls(as the postback calls the Page_load() event so if you don't have them at the load event they will not be generated and hence will not be displayed.). So, it is always better to re-render the controls in the load event.
So, in order to get the value of the dynamically assigned controls (either HTML or Asp.net) here is how i would do that.
First, create a holder which will be used to store the controls in the page either with runat="server"(So, you can access that control in the backend). In your case, that control is my_Table. Then use the Session/ViewState to keep a track of all the created dynamic controls which can be used re-render the controls with their values as:
To add a new control in the page it would be like this:
var cnt = _findRelated("txtDynamic") + 1; //for all the dynamic text boxes i am using the prefix of txtDynamic just to keep SOC.
var nId = $"txtDynamic-{cnt}";
var _ctrl = new HtmlInputText("Integer")
{
Name = nId,
ID = nId,
//Value="Default Value" //uncomment to assign a default value
};
_ctrl.Attributes.Add("runat", "server");
var row = new System.Web.UI.HtmlControls.HtmlTableRow();
var newCell = new HtmlTableCell();
newCell.Controls.Add(_ctrl);
row.Cells.Add(newCell);
my_Table.Rows.Add(row);
Session.Add(cnt.ToString(), _ctrl); //here i am using session to manage the controls but you can also use the ViewState
In the above code i am using HtmlInputText to generate an <input type="number"></input> with it's constructor taking the type string more can be read at:HtmlInputText.
The _findRelated() method is used to get the number of dynamic text controls appended to the Form. It is defined as:
private int _findRelated(string prefix)
{
string reqstr = Request.Form.ToString();
return ((reqstr.Length - reqstr.Replace(prefix, "").Length) / prefix.Length);
}
To set the value of the dynamically added control we can do something like this(if not assigned at the creation):
var cell = my_Table.Rows[_myTable.Rows.Count-1].cells[0]; //here i have assumed it is in the last row and in the first cell you can change the index to be anything.
var txtDynamic = cell.Controls.OfType<HtmlInputText>().FirstOrDefault();//getting the control
txtDynamic.Value = "<Some thing new>"; //setting the value
Now, to get the assigned the value:
var cell = my_Table.Rows[_myTable.Rows.Count-1].cells[0]; //here i have assumed it is in the last row and in the first cell you can change the index to be anything.
var txtDynamic = cell.Controls.OfType<HtmlInputText>().FirstOrDefault();//getting the control
//now use the .Value property of the control to get the value as:
var nValue = txtDynamic.Value;
And as we know the dynamically added controls will be lost on the postback event then we can create a method which will use the controls stored in the Session and re-render them with their values as:
private void _renderControls()
{
try
{
if (Session.Count > 0)
{
for (int k = 0; k < Session.Count; k++)
{
if (Session[k] != null)
{
var _ctrl = new HtmlInputText("Integer") //you can make it dynamic to add different types of input control
{
Name = ((HtmlInputText)Session[k]).ID,
ID = ((HtmlInputText)Session[k]).ID,
Value = ((HtmlInputText)Session[k]).Value
};
if (_ctrl != null)
{
_ctrl.Attributes.Add("runat", "server");
var row = new System.Web.UI.HtmlControls.HtmlTableRow();
var newCell = new HtmlTableCell();
newCell.Controls.Add(_ctrl);
row.Cells.Add(newCell);
my_Table.Rows.Add(row);
}
}
}
}
}
catch (Exception ex)
{
throw ex;
}
}
Now, let's modify the Page_load() event to call this method on every postback as:
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
_renderDynamic(); // this method will be called if there is an postback event to re-render the dynamic controls
}
}
Note:
This is just a sample(there can be a lot better approaches out there).
I have used HtmlInputText with property as Integer to create ainput[type="number"].

Dinamically generate a button to open file dialog and select a file using WPF controls and C#

Basically I'm making a program that allows you to add to a stackpanel another stackpanel with several horizontally aligned textboxes with the press of a button. So far, everything is working as intented. Here's my code so far ,Stacker is the name of the parent stackpanel and it starts off empty:
private void Add_Click(object sender, RoutedEventArgs e)
{
Stacker.Children.Add(NewXD(Stacker.Children.Count + 1));
}
public System.Windows.Controls.StackPanel NewXD(int XD)
{
System.Windows.Controls.StackPanel NewP = new StackPanel();
NewP.Orientation = Orientation.Horizontal;
System.Windows.Controls.TextBox HAHA = new TextBox();
HAHA.Name = "question" + XD.ToString();
//HAHA.Text = HAHA.Height.ToString()+" "+HAHA.Width.ToString();
HAHA.Height = Double.NaN;
HAHA.Width = 120;
HAHA.FontSize=20;
NewP.Children.Add(HAHA);
for (int i = 1; i < 6; i++)
{
System.Windows.Controls.TextBox newBox = new TextBox();
newBox.Name = "answer"+XD.ToString()+"_"+i.ToString();
newBox.Height = Double.NaN;
newBox.Width = 120;
NewP.Children.Add(newBox);
}
System.Windows.Controls.ComboBox correct = new ComboBox();
correct.Name = "correct" + XD.ToString();
for (int i = 1; i < 6; i++)
{
System.Windows.Controls.ComboBoxItem newItem = new ComboBoxItem();
newItem.Name = "ans" + XD.ToString() + "_" + i.ToString();
newItem.Content = i.ToString();
correct.Items.Add(newItem);
}
NewP.Children.Add(correct);
return NewP;
}
I apologize for the lack of seriousness in some of my code.
Now, what I need to do is for the child stackpanels to also contain independent file pickers that work like the one sampled in this thread: Open file dialog and select a file using WPF controls and C#
What I don't know how to perform is that each of these generated buttons have the same basic funcion but are linked with each of their corresponding textbox.
Thanks in advance :)
Edit: As I was writing this it occured to me that perhaps I could use the help of the child stackpanel's array-like properties to choose the corresponding textbox, because the file selector's textbox and button will always be the last two items in the stackpanel, but I'm not very sure how to perform this.

For functionality you can create an EventHandler that will be assigned to each button. Your event handler will then open File Dialog...
Buttons have Tag property which you could use to identify your TextBoxes, or you could derive from Button class and add AssociatedTextBox property for example.

Adding dynamic text boxes in windows store app 8.1 using xaml c#

TextBox x = new TextBox();
x.Height = 30;
x.Width = 200;
x.Name = "Title";
x.Text = item.Title;
x.TextWrapping = TextWrapping.Wrap;
x.FontSize = 60;
StackPanel s = new StackPanel();
s.Children.Add(x);
I have placed this code inside a function called private async void Getnotes();
and im calling this function from the constructor after this.InitializeComponent();
But when i run the app,text boxes are not getting added. what could be the problem?

You need to add the stackpanel to the window
window.AddChild(s);
You need to pass the window to your function.

by default wpf app has a non named grid.
name it "MyMainGrid".
and then you can add ether your stack panel.
MyMainGrid.Children.Add(s);
or directly add textbox to grid.
MyMainGrid.Children.Add(X);

How to change the location of a textbox

I have a problem, im making me own custom SharePoint webpart.
everything is going well, but the problem is that i can't figure out how to change the location of the textboxes and labels.
anyone knows how i can change the locations?
I am trying to accomplish it in C#.
problem SOLVED.

With the help of component ids. set position of that particular component.

"How to change the location of the textboxes and labels"
In this example i'm using a Button (Action performed on Button Click) and i am also adding how to Generate a TextBox and a Label (When you press this Button).
Just because this is usually a common process within setting locations to a control.
private void button1_Click(object sender, EventArgs e)
{
// Settings to generate a New TextBox
TextBox txt = new TextBox(); // Create the Variable for TextBox
txt.Name = "MyTextBoxID"; // Identify your new TextBox
// Create Variables to Define "X" and "Y" Locations
var txtLocX = txt.Location.X;
var txtLocY = txt.Location.Y;
//Set your TextBox Location Here
txtLocX = 103;
txtLocY = 74;
// This adds a new TextBox
this.Controls.Add(txt);
// Now do the same for Labels
// Settings to generate a New Label
Label lbl = new Label(); // Create the Variable for Label
lbl.Name = "MyNewLabelID"; // Identify your new Label
// Create Variables to Define "X" and "Y" Locations
var lblLocX = lbl.Location.X;
var lblLoxY = lbl.Location.Y;
//Set your Label Location Here
lblLocX = 34;
lblLoxY = 77;
// Adds a new Label
this.Controls.Add(lbl);
}
}
Note: This is just an example and will not work after postback.
I hope this answers to your and everyone's question.

Can StatusStrip automatically change its height depending on its items' size?

I've got a statusstrip with a number of items. One of them is a ToolStripStatusLabel with Spring = True.
When the text of the label is too long, one can't see it.
Is it possible to make the statusstrip become higher and show whole text in multiline?

This is an interesting problem....I tried a couple of things but no success...basicall the ToolStripStatusLabel is very limited in capability.
I ended up trying a hack that gives the result you want but am not sure even I would recommend this unless of course this is absolutely necessary...
Here's what I have got...
In the properties of your StatusStrip set AutoSize = false, this is to allow the StatusStrip to be resized to accommodate multiple lines. I am assuming statusStrip called ststusStrip1 containing label called toolStripStatusLabel1.
At form Level declare a variable of TextBox type:
TextBox txtDummy = new TextBox();
At Form Load set some of its properties:
txtDummy.Multiline = true;
txtDummy.WordWrap = true;
txtDummy.Font = toolStripStatusLabel1.Font;//Same font as Label
Handle the paint event of the toolStripStatusLabel1
private void toolStripStatusLabel1_Paint(object sender, PaintEventArgs e)
{
String textToPaint = toolStripStatusLabel1.Tag.ToString(); //We take the string to print from Tag
SizeF stringSize = e.Graphics.MeasureString(textToPaint, toolStripStatusLabel1.Font);
if (stringSize.Width > toolStripStatusLabel1.Width)//If the size is large we need to find out how many lines it will take
{
//We use a textBox to find out the number of lines this text should be broken into
txtDummy.Width = toolStripStatusLabel1.Width - 10;
txtDummy.Text = textToPaint;
int linesRequired = txtDummy.GetLineFromCharIndex(textToPaint.Length - 1) + 1;
statusStrip1.Height =((int)stringSize.Height * linesRequired) + 5;
toolStripStatusLabel1.Text = "";
e.Graphics.DrawString(textToPaint, toolStripStatusLabel1.Font, new SolidBrush( toolStripStatusLabel1.ForeColor), new RectangleF( new PointF(0, 0), new SizeF(toolStripStatusLabel1.Width, toolStripStatusLabel1.Height)));
}
else
{
toolStripStatusLabel1.Text = textToPaint;
}
}
IMP: Do not assign the text property of your label instead put it in Tag we would use it from Tag
toolStripStatusLabel1.Tag = "My very long String";