Develop Reference

c# on and off switch not changing

firstly thanks for taking your time to give me a hand.
So here is what I'm trying to do, I have a on / off switch.
If it's checked it has a tick.
If it's not checked it has a cross.
So I'm trying to make the Visibility set to false if it's got a cross and visibility to true if it's got a tick.
Here is my code.
private void on_off_CheckedChanged(object sender, EventArgs e)
{
if (on_off.Checked == true) return;
{
groupBox1.Visible = true;
statistics_text.Visible = true;
}
if (on_off.Checked == false) return;
{
groupBox1.Visible = false;
statistics_text.Visible = false;
}
}
But for some strange reason this doesn't seem to work.

Here's your code, formatted so you can see more easily what's going on:
if (on_off.Checked == true)
return;
groupBox1.Visible = true;
statistics_text.Visible = true;
if (on_off.Checked == false)
return;
groupBox1.Visible = false;
statistics_text.Visible = false;
I can't imagine you want to just return if the CheckBox is checked.
This is more likely what you wanted. Remove the return statement and make sure only one block or the other execute with an else statement.
if (on_off.Checked == true)
{
groupBox1.Visible = true;
statistics_text.Visible = true;
}
else
{
groupBox1.Visible = false;
statistics_text.Visible = false;
}
Even more succinctly:
groupBox1.Visible = on_off.Checked;
statistics_text.Visible = on_off.Checked;

if user start typing in textbox value change to input else if user didn't type any thing value change to an specific string in C#

I have a listview and created a textbox to search itmes in that list!
everything is ok about searching!
but problem is I want my search box to be like this:
at first Searchbox.Text="Search ..." and if user started typing in that searchbox change to that keyword! else(if) searchbox got empty Searchbox.Text change to "Search ..." again!
maybe it's a little complicated! but i tried 1-2 hours on it! and couldn't make it!
I have used Timers,checkboxchange event,booleans,...! but couldn't make it! :(
Please Help!
*my Searchbox name here is textbox1.
Some Codes I tested:
private void textBox1_TextChanged(object sender, EventArgs e)
{
string str = textBox1.Text;
/*
if (!keywordentered_bool)
{
textBox1.Text = "";
}
*/
if (str != "")
{
//Doing Search operations!
search_bool = true;
}
else
{//Doing Search operations!
search_bool = true;
// keywordentered_checkbox.Checked = true;
Searchtextbox_Timer.Interval = 100;
Searchtextbox_Timer.Enabled = true;
Searchtextbox_Timer.Tick += Searchtextbox_Timer_Tick;
//textBox2.Visible = false;
}
}
else
{
if (search_bool)
{
listView1.Items.Clear();
label1.Visible = false;
listView1.Items.AddRange(Originalplaylist_list.ToArray());
if (!search_bool)
{
listView1.Items[MusicLogindex_list[MusicLogindex_list.Count - 1]].ForeColor = Color.Cyan;
}
else if (search_bool)
{//Doing Search operations
search_bool = false;
Searchtextbox_Timer.Interval = 100;
Searchtextbox_Timer.Enabled = true;
Searchtextbox_Timer.Tick += Searchtextbox_Timer_Tick;
//textBox2.Visible = true;
// keywordentered_checkbox.Checked = false;
}
}
void Searchtextbox_Timer_Tick(object sender, EventArgs e)
{
if (!search_bool)
{
textBox2.Visible = true;
textBox2.Location = textBox1.Location;
//textBox1.Text = "Search ...";
//textBox1.ForeColor = Color.Gray;
//textBox1.Font = new Font(textBox1.Font, FontStyle.Italic);
}
else
{
textBox2.Visible = false;
// textBox1.Text = "";
// textBox1.ForeColor = Color.Black;
// textBox1.Font = new Font(textBox1.Font, FontStyle.Regular);
}
Searchtextbox_Timer.Enabled = false;
//throw new NotImplementedException();
}

This is just psuedocode but the concept is there and you need to implement the text change event for searching , you can do additional changes in event handler.
Textbox myTxtbx = new Textbox();
myTxtbx.Text = "Enter text here...";
myTxtbx.OnFocus += OnFocus.EventHandle(RemoveText);
myTxtbx.LoseFocus += LoseFocus.EventHandle(AddText);
public RemoveText(object sender, EventArgs e)
{
myTxtbx.Text = "";
}
public AddText(object sender, EventArgs e)
{
if(string.IsNullorEmpty(myTxtbx.Text))
myTxtbx.Text = "Enter text here...";
}
This is an example shows for a dynamic textbox control, you can add these events to your control and use the same code for make it work.
Or you can use this plugin
Visual Studio gallery plugin
Another plugin you can use for this purpose
Textbox with placeholder
Hope this helps.

thanks to #Frebin Francis my problem solved!
I downloaded the source code from this link TextBox With Placeholder
and added it to my project! then add it to my form and yeah! :)

How do i get an information label to appear as i type and disappear when i delete the text

I have a couple of text boxes that i have initially hidden and what I want to do is as the users type I would like the next text box along with the label that goes with it to appear to notify of the next question.
At the same time if they change their mind and delete their response to the first question the next text box and label will disappear once the text has been deleted.
Here is my current code:
private void CreditScoreBox_KeyPress(object sender, KeyPressEventArgs e)
{
if (char.IsControl(e.KeyChar) || char.IsDigit(e.KeyChar))
e.Handled = false;
else
e.Handled = true;
if(CreditScoreBox.Text == "")
{
MakeBox.Visible = false;
MakeLabel.Visible = false;
ModelBox.Visible = false;
ModelLabel.Visible = false;
CreditLevelLabel.Visible = false;
}
else
{
MakeBox.Visible = true;
MakeBox.Enabled = true;
MakeLabel.Visible = true;
CreditLevelLabel.Visible = true;
}
I have tried using the TextChanged event with the same result.

I created a Form, with 2 textbox and 1 label. If text exist in textbox1 then label1 and textbox2 become available:
private void textBox1_TextChanged(object sender, EventArgs e)
{
if (textBox1.Text == "")
{
textBox2.Enabled = false;
textBox2.Visible = false;
label1.Visible = false;
}
else
{
textBox2.Enabled = true;
textBox2.Visible = true;
label1.Visible = true;
}
}

RadioButtonList: OnSelectedIndexChanged not firing

I have an aspx page where i dynamically add a radiobuttonlist with OnSelectedIndexChanged event. In the event i check for the selected items. i have 2 items.
For the first item,the event is firing well, However if i choose the other option the event is not firing: below the code..
The event is only firing is i change from "Some provided" to "All provided" the other way it is not working
Adding the RBL:
RadioButtonList dControl_b = new RadioButtonList();
dControl_b.ID = "rbl_MinCriteria";
dControl_b.RepeatDirection = System.Web.UI.WebControls.RepeatDirection.Horizontal;
dControl_b.CssClass = "Font";
dControl_b.Font.Name = "Arial";
dControl_b.Font.Size = 8;
dControl_b.ToolTip = "";
dControl_b.SelectedIndex = -1;
dControl_b.SelectedIndexChanged += new EventHandler(rbl_MinCriteria_SelectedIndexChanged);
dControl_b.AutoPostBack = true;
Checking the selected item:
if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
{
cbl_MinimumCriteria.Items[0].Selected = true;
cbl_MinimumCriteria.Items[1].Selected = true;
cbl_MinimumCriteria.Items[2].Selected = true;
cbl_MinimumCriteria.Items[3].Selected = true;
cbl_MinimumCriteria.Enabled = false;
//*************************************************************
if (ddl_CountryOccurence.SelectedValue != "Please choose")
{
ddl_CountryOccurence.Enabled = false;
}
else
{
ddl_CountryOccurence.Enabled = true;
}
//*************************************************************
if (tb_DueDate.Text != "")
{
tb_DueDate.Enabled = false;
}
else
{
tb_DueDate.Enabled = true;
}
OtherControlI.Enabled = false;
OtherControlII.Enabled = false;
OtherControlIII.Enabled = false;
}
if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
{
cbl_MinimumCriteria.Items[0].Selected = false;
cbl_MinimumCriteria.Items[1].Selected = false;
cbl_MinimumCriteria.Items[2].Selected = false;
cbl_MinimumCriteria.Items[3].Selected = false;
cbl_MinimumCriteria.Enabled = true;
//*************************************************************
if (ddl_CountryOccurence.SelectedValue != "Please choose")
{
ddl_CountryOccurence.Enabled = false;
}
else
{
ddl_CountryOccurence.Enabled = true;
}
//*************************************************************
if (tb_DueDate.Text != "")
{
tb_DueDate.Enabled = false;
}
else
{
tb_DueDate.Enabled = true;
}
OtherControlI.Enabled = false;
OtherControlI.SelectedIndex = -1;
OtherControlII.Enabled = false;
OtherControlII.SelectedIndex = -1;
OtherControlIII.Enabled = false;
OtherControlIII.SelectedIndex = -1;
}
Any help and Comment is much appreciated

This is for people who find this question from Google:
On the RadioButtonList, set the AutoPostBack property to true.
RadioButtonList OnSelectedIndexChanged

I have this problem and solved it.
For raising onselectedindexchanged event of RadioButtonList , check below items:
<asp:RadioButtonList ID="rdlCondition" runat="server" AutoPostBack="True"
onselectedindexchanged="rdlCondition_SelectedIndexChanged">
and in the Page_Load set them with code :
rdlCondition.AutoPostBack = true;
rdlCondition.SelectedIndexChanged += new EventHandler (rdlCondition_SelectedIndexChanged);

Looking at the code above there seems to be alot of code reuse. I reorganized your code a bit (assuming you didnt leave anything out). Keep in mind I never tested it.
protected void rbl_MinCriteria_SelectedIndexChanged(object sender,EventArgs e)
{
if (rbl_MinCriteria.SelectedIndex<0) return; //If nothing is selected then do nothing
OtherControlI.Enabled = false;
OtherControlII.Enabled = false;
OtherControlIII.Enabled = false;
if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
{
cbl_MinimumCriteria.Items[0].Selected = true;
cbl_MinimumCriteria.Items[1].Selected = true;
cbl_MinimumCriteria.Items[2].Selected = true;
cbl_MinimumCriteria.Items[3].Selected = true;
cbl_MinimumCriteria.Enabled = false;
}
if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
{
cbl_MinimumCriteria.Items[0].Selected = false;
cbl_MinimumCriteria.Items[1].Selected = false;
cbl_MinimumCriteria.Items[2].Selected = false;
cbl_MinimumCriteria.Items[3].Selected = false;
cbl_MinimumCriteria.Enabled = true;
OtherControlI.SelectedIndex = -1;
OtherControlII.SelectedIndex = -1;
OtherControlIII.SelectedIndex = -1;
}
//*************************************************************
if (ddl_CountryOccurence.SelectedValue != "Please choose")
{
ddl_CountryOccurence.Enabled = false;
}
else
{
ddl_CountryOccurence.Enabled = true;
}
//*************************************************************
if (tb_DueDate.Text != "")
{
tb_DueDate.Enabled = false;
}
else
{
tb_DueDate.Enabled = true;
}
}
I know this doesn't help your current problem but this is just a suggestion. If you could post the code where your actually adding the values to the list I could help a bit more.
EDIT: Your problem could be your not setting the value of your items, only the text. Try using rbl_MinCriteria.SelectedItem.Text =="All provided" instead.

I've made a sample aspx page, and added one panel in .aspx like below:
<asp:Panel ID="Panel1" runat="server"></asp:Panel>
And in code behind, I've added following code:
protected void Page_Load(object sender, EventArgs e)
{
RadioButtonList dControl_b = new RadioButtonList();
dControl_b.ID = "rbl_MinCriteria";
dControl_b.RepeatDirection = System.Web.UI.WebControls.RepeatDirection.Horizontal;
dControl_b.CssClass = "Font";
dControl_b.Font.Name = "Arial";
dControl_b.Font.Size = 8;
dControl_b.ToolTip = "";
dControl_b.SelectedIndex = -1;
dControl_b.SelectedIndexChanged += new EventHandler(rbl_MinCriteria_SelectedIndexChanged);
dControl_b.AutoPostBack = true;
dControl_b.Items.Add(new ListItem("All provided"));
dControl_b.Items.Add(new ListItem("Some provided"));
Panel1.Controls.Add(dControl_b);
}
protected void rbl_MinCriteria_SelectedIndexChanged(object sender,EventArgs e)
{
RadioButtonList rbl_MinCriteria = (RadioButtonList)Panel1.FindControl("rbl_MinCriteria");
if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
{
}
if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
{
}
}
The event is FIRING EVERY TIME the radio button listitem is changed.
So, I'm afraid, you have done something wrong elsewhere. Good luck.

cannot see the label content when a item is selected from dynamically added dropdownlist

I have a Dropdownlist (DDL1) when I select any item from this dropdownlist(DDL1), results in creation of another dropdownlist(DDL2), This contains some of the items.When I select other Item from DDL1 , Items will change in DDL2, this happens for the each different item selected in DDL1.
when I select a item from DDL2, label content must be shown, intially I'm making Label invisibe and in the code I changed the visibility to true and added content to it. But the label content is not shown when I select a item from DDL2.
Here is my Code
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList1.SelectedValue == "Abe Books")
{
DropDownSeller.Visible = true;
lnkUsdBooks.Visible = true;
lnkUsdBooks.Text = "usedbooks#abe.com";
lnkUsdBooks.NavigateUrl = "mailto:usedbook#abe.com";
DropDownSeller.Visible = true;
DropDownSeller.Items.Remove("Chacha Choudary");
DropDownSeller.Items.Remove("SpiderMan");
DropDownSeller.Items.Remove("Amar chitra Katha");
DropDownSeller.Items.Remove("Chandamama");
DropDownSeller.Items.Remove("Mahabharata");
DropDownSeller.Items.Add("Amar chitra Katha");
DropDownSeller.Items.Add("Chandamama");
DropDownSeller.Items.Add("Mahabharata");
DropDownSeller.DataBind();
if (DropDownSeller.SelectedValue == "Amar chitra Katha")
{
lblPrice.Visible = true;
lblPrice.Text = "$69.99";
}
else if (DropDownSeller.SelectedValue == "Chandamama")
{
lblPrice.Visible = true;
lblPrice.Text = "$59.99";
}
else if (DropDownSeller.SelectedValue == "Mahabharata")
{
lblPrice.Visible = true;
lblPrice.Text = "$49.99";
}
else
{
lblPrice.Visible = false;
}
}
Any ideas on this are appreciated
Thanks,

Remove if (!Page.IsPostBack) from the DropDownList1_SelectedIndexChanged because when the page postbacks this condition will be false. Because your page is posting back to the server that's why it is not visible and not showing.
In short your DropDownList1_SelectedIndexChanged should be like..
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList1.SelectedValue == "Abe Books")
{
DropDownSeller.Visible = true;
lnkUsdBooks.Visible = true;
lnkUsdBooks.Text = "usedbooks#abe.com";
lnkUsdBooks.NavigateUrl = "mailto:usedbook#abe.com";
DropDownSeller.Visible = true;
DropDownSeller.Items.Clear(); // it will clear all the items, instead you are removing one by one
DropDownSeller.Items.Add("Amar chitra Katha");
DropDownSeller.Items.Add("Chandamama");
DropDownSeller.Items.Add("Mahabharata");
DropDownSeller.DataBind();
}
protected void DropDownSeller_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownSeller.SelectedValue == "Amar chitra Katha")
{
lblPrice.Visible = true;
lblPrice.Text = "$69.99";
}
else if (DropDownSeller.SelectedValue == "Chandamama")
{
lblPrice.Visible = true;
lblPrice.Text = "$59.99";
}
else if (DropDownSeller.SelectedValue == "Mahabharata")
{
lblPrice.Visible = true;
lblPrice.Text = "$49.99";
}
else
{
lblPrice.Visible = false;
}
}