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How can I get the value of the data contained in the Asp Dropdown?

There are 4 values in my dropdown list, and if there is an "x" value in it, I want to hide that value. How can I do this using the If command.
protected void dr_alans_DataBound(object sender, EventArgs e)
{
if (dd_mainAlan.SelectedItem.Text == "Yönetici")
{
if (dr_alans.Items.FindByValue("22").Value=="22")
{
dr_alans.Items.FindByValue("22").Enabled = false;
}
else if (dr_alans.Items.FindByValue("23").Value == "23")
{
dr_alans.Items.FindByValue("23").Enabled = false;
}
}
}

If it is ASP.NET Forms, you should be able to do it like this maybe. This should hide the items with an x in the Value.
foreach (var itm in dd_mainAlan.Items)
{
var it = (ListItem)itm;
it.Enabled = !it.Value.Contains("x");
}

C# Check if items in checklistbox are un-checked?

I'm trying to list all items in a directory which has been successful. I need to check if the item's status is "Unchecked", and if it is to give me the name of it in a variable.
TL;DR: If item is unchecked, write item in variable.
private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
if (checkedListBox1.GetItemChecked(e.Index) == true)
{
if (checkedListBox1.CheckedItems.Count != 0)
{
// If so, loop through all checked items and print results.
string s = "";
for (int x = 0; x < checkedListBox1.CheckedItems.Count; x++)
{
if (checkedListBox1.CheckedItems[x] == 0)
{
s = checkedListBox1.CheckedItems[x].ToString();
}
}
MessageBox.Show(s);
}
}
}
This is my current code.

To get a list of all unchecked items:
private void button1_Click_1(object sender, EventArgs e)
{
List<String> items = new List<String>();
for (int i=0; i<checkedListBox1.Items.Count; i++)
{
if (!checkedListBox1.GetItemChecked(i))
{
items.Add(checkedListBox1.Items[i].ToString());
}
}
// ... do something with "items" ...
foreach(String item in items)
{
Console.WriteLine(item);
}
}

Making a list of TextBoxes

Code:-
public partial class Players : Form
{
public TextBox[] spelers = new TextBox[7];
List<string> spelersSpel = new List<string>();
public Form1 game = new Form1();
public Players()
{
InitializeComponent();
spelers[0] = inputSpeler1;
spelers[1] = inputSpeler2;
spelers[2] = inputSpeler3;
spelers[3] = inputSpeler4;
spelers[4] = inputSpeler5;
spelers[5] = inputSpeler6;
}
private void btnSpelers_Click(object sender, EventArgs e)
{
for (int i = 0; i < spelers.Length; i++)
{
if (spelers[i] != null)
spelersSpel.Add(spelers[i].Text);
}
foreach (TextBox item in spelers)
{
if (item != null)
spelersSpel.Add(item.Text);
}
MessageBox.Show(spelersSpel.Count.ToString());
game.ShowDialog();
}
}
I've got 6 textboxes that I've put into an array. Then I want to put this array into a form. Because I don't know how much input I get from the textboxes I don't use an array. But when I want to see how big my list is. It's saying 6. If I only type text in the first textbox the list should be 1.
What am I doing wrong?

You can get the input count by this way：
spelersSpel.Clear();
foreach (TextBox item in spelers)
{
if (item != null && item.Text.Trim() != "") //check if null or empty
spelersSpel.Add(item.Text);
}

Because (spelers[i] != null) and (item != null) does not check whether the textboxes are blank; It means the array element is null or not.
If you want to check whether your textbox is blank, you should find property Text;
if (item.Text != "")
I'm not able to use my IDE and it is not sure, but try this.
public partial class Players : Form
{
public TextBox[] spelers = new TextBox[6]; // [7];
List<string> spelersSpel = new List<string>();
public Form1 game = new Form1();
public Players()
{
InitializeComponent();
spelers[0] = inputSpeler1;
spelers[1] = inputSpeler2;
spelers[2] = inputSpeler3;
spelers[3] = inputSpeler4;
spelers[4] = inputSpeler5;
spelers[5] = inputSpeler6;
}
private void btnSpelers_Click(object sender, EventArgs e)
{
/*
// 1.
for (int i = 0; i < spelers.Length; i++)
{
if (spelers[i] != null) {
throw new Exception("NullTextBoxException");
}
else if (spelers[i].Text == "") {
// skip when the textbox is empty
continue;
}
spelersSpel.Add(spelers[i].Text);
}
*/
foreach (TextBox item in spelers)
{
if (item != null) {
// throw exception when referring textbox is null
throw new Exception("NullTextBoxException");
}
else if (item.Text == "") {
// skip when the textbox is empty
continue;
}
spelersSpel.Add(item.Text);
}
MessageBox.Show(spelersSpel.Count.ToString());
game.ShowDialog();
}
}

You are confusing the TextBox object with its Text property.
If I understand correctly you want the List<string> to contain only the text for the textboxes that are not empty, so your code should be something like this
spelersSpel.Clear();
foreach (TextBox item in spelers)
{
if (item != null && !string.IsNullOrWhiteSpace(item.Text))
spelersSpel.Add(item.Text);
}
Notice that you declare the array to contain 7 TextBoxes (index from 0 to 6) but you add only 6 textboxes to it, so you need always this check for NULL because, when you loop over your elements, you have a NULL entry in your array at index 6. So, perhaps, if you have only 6 textboxes it is better to declare the array with
public TextBox[] spelers = new TextBox[6];
Next, in the click event, you execute two loops to fill the list, this of course will duplicate the list content.
However, I think that a better approach is to use directly a List<TextBox>, work with it and get rid of the array and the List<string>
public partial class Players : Form
{
public List<TextBox> spelers;
public Form1 game = new Form1();
public Players()
{
InitializeComponent();
spelers = new List<TextBox>()
{
inputSpeler1, inputSpeler2, inputSpeler3,
inputSpeler4, inputSpeler5, inputSpeler6
}
}
private void btnSpelers_Click(object sender, EventArgs e)
{
MessageBox.Show(spelers
.Count(x => !string.IsNullOrWhiteSpace(x.Text))
.ToString());
game.ShowDialog();
}
}

Foreach selected item in Listbox?

I have a dialog that is used to select which forms to show. Originally it was just being selected from a combo box, but now we need to select multiple, so we changed it to a list box.
Here is the method that we used for the combo box:
if (view.ShowDialog() == DialogResult.OK)
{
if (view.FormType == "Form1")
return new Form1_Controller();
else if (view.FormType == "Form2")
return new Form2_Controller();
else if (view.FormType == "Form3")
return new Form3_Controller();
else return null;
}
else
{
return null;
}
How can we encapsulate this in a loop that will return a controller for each selection?
For example, I have tried something like
foreach (ListBoxItem listItem in view.ListBox1)
{
//do if (view.FormType == "Form1")
}
But I don't know the right syntax to use.

To open all forms simultaneously, I would try a different approach something like this
ArrayList controllersSelected = new ArrayList();
foreach (var item in view.ListBox1.SelectedItems)
GetSelectedItem(item.Value, out controllersSelected);
//Your logic to display selected forms simultaneously
DisplaySimultaneousForms(controllersSelected);
private void GetSelectedItem(formName, out ArrayList list)
{
if (view.FormType == "Form1")
list.Add(new Form1_Controller());
else if (view.FormType == "Form2")
list.Add(new Form2_Controller());
else if (view.FormType == "Form3")
list.Add(new Form3_Controller());
}

use SelectedItems:
foreach (var item view.ListBox1.SelectedItems)
SelectForm(item.ToString());
void SelectForm(string value)
{
if(value == "Form1")
return new Form1_Controller();
...
}

You can use below code :
foreach (var item in view.ListBox1.SelectedItems)
{
ShowForm(item.Value);
}
private void ShowForm(formName)
{
if (view.FormType == "Form1")
return new Form1_Controller();
else if (view.FormType == "Form2")
return new Form2_Controller();
else if (view.FormType == "Form3")
return new Form3_Controller();
else return null;
}

private void button1_Click(object sender, EventArgs e)
{
for (int i = 0; i <= listBox1.SelectedItems.Count - 1; i++)
{
switch (listBox1 .Items [i].ToString ())
{
case "FirstForm":
Form2 frm2 = new Form2();
frm2.Show();
break;
case "SecondForm":
Form3 frm3 = new Form3();
frm3.Show();
break;
default:
break;
}
}
}

update the datagridview combobox, throws "Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function."

when i try to update the content of the datagridview combo box it throws
Operation is not valid because it results in a reentrant call to the SetCurrentCellAddressCore function
at line ,node.Cells[(int)Parameters.eColumn.valueBySelectionColumn] = cboCell;
How can i solve this problem??
THX
private void treeGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
try
{
if (e.Control.GetType() == new DataGridViewComboBoxEditingControl().GetType())
{
if ((cboEditor != null) && (cboEditor_EventHandler != null))
{
cboEditor.SelectedIndexChanged -= cboEditor_EventHandler;
}
cboEditor = (DataGridViewComboBoxEditingControl)e.Control;
cboEditor.SelectedIndexChanged += cboEditor_EventHandler;
if (this.treeGridView1.SelectedCells.Count > 0 &&
this.treeGridView1.SelectedCells[0].ColumnIndex == (int)Parameters.eColumn.valueBySelectionColumn)
{
TreeGridNode node = GetCurrentNode();
object cellValue = node.Parent.Cells[(int)Parameters.eColumn.sectionTypeColumn].Value;
Parameters.eSection section = (Parameters.eSection)dicSection[cellValue.ToString()];
this.treeGridView1.Focus();
switch (section)
{
case Parameters.eSection.UNIX_Script:
DataGridViewComboBoxCell cboCell = Parameters.ValidateChoice(Parameters.eSection.UNIX_Script,
node.Cells[(int)Parameters.eColumn.parameterTypeColumn].Value,
ref cboEditor);
if (cboCell != null)
{
***node.Cells[(int)Parameters.eColumn.valueBySelectionColumn] = cboCell;***
node.Cells[(int)Parameters.eColumn.valueBySelectionColumn].Style.BackColor =
node.Cells[(int)Parameters.eColumn.sequenceColumn].Style.BackColor;
}
break;
}
}
}
}
}