i have written following code to access public variable of asp.net onclick event on button but its not giving me desired output.. please check it:
<asp:Button runat="server" CssClass="txtdisplay" ID="Button1"
Text="Browse all jobs in area"
OnClientClick="return navigateURL('index.aspx?c=<%=cityid %>')" />
I have dynamically generated a button an its event too.Now want to access a textbox (Generated Dynamically) into the onClick event of the Button.How can i do this?
View 2 Replieslet me see if I can explain this clearly. I have a gridview control
and I am trying to use the Edit function. In my gridview, there are numerous rows. I pick one to change and click Edit. I then see the boss name in my gridview and click "Change". When I click Change, I'm expecting two fields to appear, one is a label, the other is a DropDownList. I get this error when I click:
System.NullReferenceException was unhandled by user code
Message=Object reference not set to an instance of an object.
Source=App_Web_lzmklgbg
StackTrace:
at Training_TRManageOrg.LinkButton1_Click(Object sender, EventArgs e) in d:projectsediting.aspx.cs:line 108
at System.Web.UI.WebControls.LinkButton.OnClick(EventArgs e)
at System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument)
at System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
InnerException:
Gridview HTML:
<asp:TemplateField HeaderText="Director">
<EditItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("director") %>'></asp:Label>
<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Change</asp:LinkButton>
<asp:Label ID="Label4" runat="server" Text="Director" Visible="False"></asp:Label>
-
<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="trDirector"
DataTextField="name" DataValueField="id" onselectedindexchanged="DropDownList2_SelectedIndexChanged"
Visible="False"></asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("director") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
Code Behind:
protected void LinkButton1_Click(object sender, EventArgs e)
{
DropDownList DropDownList1 = ((DropDownList)FindControl("DropDownList1"));
DropDownList1.Visible = true; // this line is where the exception occurs
Label3.Visible = true;
}
I figure I must be overlooking something so I'm asking what am I missing?
I can access a module from code behind but not from the aspx page in inline VB code <% ... %>.
I know its got to be something simple but I can't seem to find the answer anywhere.
I have a question about C Sharp ASP.NET:Is there a difference (in code speed, resources) between:public static variable declared in public static class MyGlobals in a 'Code File' template;and the variable declared in a normal 'Class File' template;I use this variable in 2 different Class Files and also in _Default Page codebehind cs file.In fact in my case I need about 20 global variables of type List<string>.
View 9 RepliesBasically when a user clicks a button I have a javascript code that runs that displays the hidden DIV, my question is how do I make it so when the users click it executes the SQL code (which is already written to select the data) and then it displays it in the DIV that I want. Would the only way to do this be add a label to the DIV and then use LabelName.Text to populate it or can this be accomplished some other way? I am using Visual Studio 2008 and coding in c#.
View 2 RepliesI want to correspond the output of a store procedure to the image onclick event I mean here:
protected void imageLoaded(object sender, EventArgs e) {
Image1.ImageUrl("~/pic/"+Eval(" " )); }
I don't know what I should write in Eval.
i have written an button click event in js file but the event wasnt fired the code seems below
$("#btnSearch").click(function () {
debugger; alert("search button event fired");
$("#ctl00_MaintenanceContentHolder_btnSearch").click(function
ugger; alert("searchbutton event fired");
I have a variable in an aspx file I need to use/recover it's value into an ascx web control that's in this aspx file. It's possible to do it? The aspx dynamically loads web controls depending the scenario, so this web control not allways is loaded.
View 2 RepliesI have a problem to pass along public variables from C# code to the HTML code. I assign the variables in the Page_Load event and then pass along them to the Panel and Image control in the HTML code. Though I get this compileerror for the Width: "Cannot create an object of type "System.Web.UI.EbControls.Unit" from its string representation '<%setWidthImage%>' for the 'Width' property."
[Code]....
I'd like to know how to declare a variable in my code behind page that I can use in all the subs of my code behind.
I tried in after the Partial Class declaration to declare a "Public String" :
[Code]....
and to use it in my subs but when I use it from a sub to another I loose the value affected in another sub.
Is there a way to use a Public variable from a sub to another (I'm actually using a session variable in order to do it and I'm not sure it is the best way)
How do declare a public variable .aspx web page that can be used in all the pages within my web application? And/or create a Public Sub?
View 3 RepliesObviously I am a total noob and this is simple to some of you, but I can not figure out why the rest of the sub works, but the button1.Text="Uploading, Please Wait..." seems to be completely ignored.
The button is supposed to change text when clicked but no method I have tried works with my page.
Here is my simple upload form page:
[Code]....
How do I setup a default setting so that if I do not set an OnClick (i.e the asp.net OnClick attribute) explicitly for an asp:LinkButton tag, it will not render an onclick(html attribute for javascript) attribute client side? By default, asp.net adds an onclick='doPostBack....' for the LinkButton.
Case for use:
There is a LinkButton tag on the page. For this page, if the user has one friend, I only want to run client side code if the button is clicked and would not for any reason want to make a post back. If the user has more than one friend I would want a click to trigger a postback.
Using any asp.net Ajaxtoolkit
Dynamically switching the control type (i.e. if friends == 1 use a asp:Hyperlink)
-I want to avoid this because it is not scalable. There might be many cases where I want an asp:Link tag to do a postback or to not do a postback depending on the user context or user attributes Using OnClientClick (I am using jQuery would like to avoid this)
foreach (Control control in ContentPlaceHolder1.Controls)
{
if(typeof(Control).Equals(Telerik.Web.UI.RadEditor))
{
label1.Visible = true; label1.Text = "dhchk";
// control.CssFiles.Add("~/styles/myStyle.css");
}
}
Error;-
'Telerik.Web.UI.RadEditor' is a 'type', which is not valid in the given context
Also, is this the correct way to add CSS class to radEditor controls ??
control.CssFiles.Add("~/styles/myStyle.css");
I actually wanna add 3-4 customized classes..how to do that?
also I was wondering if I can add some javascript or something in my Master page that will detect the ALL the radEditor controls and set their css classes ? don't know much of Javascript..how can that be made possible? how do I go about that? but first I want css classes to be set in code behind..what's wrong with the code?
[EDIT]
@Geek..I tried calling like this..is it correct?
Control c = new Control();
DoSomething(c);
now its giving this error in the method:-
The type or namespace name 'c' could not be found (are you missing a using directive or an assembly reference?)
[EDIT]
I do have this namespace added "using System.Web.UI.WebControls;" why this error ??
How to create an OnClick event for hyperlink control? Can we use Attributes.Add("OnClick","eventname")?
View 1 RepliesI created a webpage names Default.aspx. In its code behind i defined another public class named Test. Test class is not accessible in other pages code behind although it is defined as public.
View 8 RepliesVoid button has a confirm box after receiving true, expecting running another button's click event
however, Void2_Button_Click not run, where is wrong?
protected void Void2_Button_Click(object sender, EventArgs e)
{
// do something
}
Void_Button.Attributes.Add("onclick", "var agree=confirm('Confirm to void?'); if (agree){document.getElementById('Void2_Button').click();}");
I would like to add an Onclick event to one button (ShipEdit is the name of the button), I would like to redirect user by clicking this button to new page that is (../Account/MyAccount.aspx) and send 2 variables that is (LineItem.LineKey and shipment.ShipmentKey) with the URL: I need to write a code in this module:
void repShipments_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
I have tried to use this line of code but it does not working.
ShipEdit.Attributes.Add("onclick","ShowPopUp(" ../Account/MyAccount.aspx?LineKey={0}&ShipmentKey=",true);",LineItem.LineKey,shipment.ShipmentKey;
I am not sure how writing it with the ShipEdit.onclick, it gave me error anything that I tried.
I have user control that have button in it. I want to create OnClick event for the button on aspx page that have that control.
View 3 RepliesHave a form with a button and some text fields on it.When I hit enter after filling a field the event for the button fires up event onClick.How can I get around this since on one of the fields I have a textchangeEvent I to fire up.
View 5 RepliesI have the following code and no matter what I do onclick event for button is not firing. I tried deleting the button, the pages. Redid the code. Moved the web project to a different computer and nothing. It worked a few hours ago.
Code on the web control .ascx:
[Code]...
This user control gets loaded into a placeholder.
I am having trouble with two buttons on a page. I dragged them on to the page and then double- clicked each of them in order to create the OnClick events.
I added my code to the events, but when I click the buttons, their respective events aren't being called.
My .aspx code:
[Code]....
My Code behind:
[Code]....
The following code is my ASP.NET page :
<MdsMenu:MenuItem Text="Button" Href="#">
<asp:Button ID="Button1" runat="server" Text="Button 01" OnClick="Button_Click" />
<asp:Button ID="Button2" runat="server" Text="Button 02" OnClick="Button_Click" />
</MdsMenu:MenuItem>
I don't know why Button_Click event doesn't fire!
protected void Button_Click(object sender, EventArgs e)
{
Button senderButton = sender as Button;
Label1.Text = senderButton.ID.ToString();
}
MdsMenu:MenuItem is my custom WebControl. If I insert a Button control out of MdsMenu:MenuItem tag it works well but if I inserted it within MdsMenu:MenuItem tag it doesn't fire the concerned method. What's wrong with my code?
Edit:
Menu.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Security.Permissions;
using System.Collections;
using System.ComponentModel.Design;
using System.Drawing.Design;
using System.Web.UI.HtmlControls;
using System.IO;
namespace MenuServerControl
{
[AspNetHostingPermission(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[DefaultProperty("MenuItems")]
[ParseChildren(true, "MenuItems")]
[ToolboxData("<{0}:Menu runat="server"> </{0}:Menu>")]
public class Menu : WebControl
{
#region Fields
private List<MenuItem> _MenuItems;
string _Direction
{
get
{
string direction = "";
switch (this.Direction)
{
case Directions.LeftToRight:
direction = "direction:ltr;";
break;
case Directions.RightToLeft:
direction = "direction:rtl;";
break;
default:
direction = "direction:rtl;";
break;
}
return direction;
}
}
string _AnimationDelay
{
get
{
if (AnimationDelay == null)
AnimationDelay = 1000;
return AnimationDelay.ToString().ToLower();
}
}
string _AnimationType
{
get
{
switch (this.AnimationType)
{
case AnimationType.Opacity_Height:
return "animation:{opacity:'show',height:'show'}";
case AnimationType.Opacity_Width:
return "animation:{opacity:'show',width:'show'}";
case AnimationType.Opacity:
return "animation:{opacity:'show'}";
case AnimationType.Height:
return "animation:{height:'show'}";
case AnimationType.Width:
return "animation:{width:'show'}";
case AnimationType.Height_Toggle:
return "animation: {height: 'toggle'}";
case AnimationType.Width_Toggle:
return "animation: {width: 'toggle'}";
default:
return "animation:{opacity:'show',height:'show'}";
}
}
}
string _AnimationSpeed
{
get
{
switch (this.AnimationSpeed)
{
case AnimationSpeed.Fast:
return "speed:'fast'";
case AnimationSpeed.Normal:
return "speed:'normal'";
case AnimationSpeed.Slow:
return "speed:'slow'";
default:
return "speed:'fast'";
}
}
}
string FloatStyle
{
get
{
if (Direction == Directions.RightToLeft)
return "float:right;";
else return "";
}
}
string _Main_ul_CssClass = "";
#endregion
#region Properties
public string Main_ul_CssClass
{
get
{
if (string.IsNullOrEmpty(_Main_ul_CssClass)) return "";
_Main_ul_CssClass = "class=" + _Main_ul_CssClass;
return _Main_ul_CssClass;
}
set
{
_Main_ul_CssClass = value.Trim();
}
}
public Directions Direction { get; set; }
public int? AnimationDelay { get; set; }
public AnimationType AnimationType { get; set; }
public AnimationSpeed AnimationSpeed { get; set; }
public bool DropShadow { get; set; }
public bool AutoArrows { get; set; }
[Category("Behavior")]
[Description("The menu collection")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public List<MenuItem> MenuItems
{
get
{
if (_MenuItems == null)
_MenuItems = new List<MenuItem>();
return _MenuItems;
}
}
public VerOrHor VerticalOrHorizontal { get; set; }
#endregion
#region Methods
public Menu()
{
DropShadow = true;
AutoArrows = true;
}
public override void RenderBeginTag(HtmlTextWriter writer)
{
writer.Write("<div id="" + this.ID + "" style="" + _Direction + " " + FloatStyle + "">");
}
public override void RenderEndTag(HtmlTextWriter writer)
{
writer.Write("</div>");
}
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
#region Adding Script & link Tags
HtmlGenericControl jquery = new HtmlGenericControl("script");
jquery.Attributes.Add("type", "text/javascript");
jquery.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(MenuServerControl.Menu), "MenuServerControl.JavaScriptFiles.jquery_1_4_3.js"));
jquery.EnableViewState = false;
Page.Header.Controls.Add(jquery);
HtmlGenericControl hoverIntent = new HtmlGenericControl("script");
hoverIntent.Attributes.Add("type", "text/javascript");
hoverIntent.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.hoverIntent.js"));
hoverIntent.EnableViewState = false;
Page.Header.Controls.Add(hoverIntent);
HtmlGenericControl jquery_bgiframe_min = new HtmlGenericControl("script");
jquery_bgiframe_min.Attributes.Add("type", "text/javascript");
jquery_bgiframe_min.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.jquery_bgiframe_min.js"));
jquery_bgiframe_min.EnableViewState = false;
Page.Header.Controls.Add(jquery_bgiframe_min);
HtmlGenericControl superfish = new HtmlGenericControl("script");
superfish.Attributes.Add("type", "text/javascript");
superfish.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.superfish.js"));
superfish.EnableViewState = false;
Page.Header.Controls.Add(superfish);
HtmlGenericControl supersubs = new HtmlGenericControl("script");
supersubs.Attributes.Add("type", "text/javascript");
supersubs.Attributes.Add("src", Page.ClientScript.GetWebResourceUrl(typeof(Menu), "MenuServerControl.JavaScriptFiles.supersubs.js"));
supersubs.EnableViewState = false;
Page.Header.Controls.Add(supersubs);
if (Direction == Directions.LeftToRight)
{
HtmlGenericControl csslink = new HtmlGenericControl("link");
csslink.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.superfish.css"));
csslink.ID = "NavigationMenu";
csslink.Attributes.Add("type", "text/css");
csslink.Attributes.Add("rel", "stylesheet");
csslink.EnableViewState = false;
Page.Header.Controls.Add(csslink);
}
else
{
HtmlGenericControl csslink = new HtmlGenericControl("link");
csslink.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.RightToLeft superfish.css"));
csslink.ID = "NavigationMenu";
csslink.Attributes.Add("type", "text/css");
csslink.Attributes.Add("rel", "stylesheet");
csslink.EnableViewState = false;
Page.Header.Controls.Add(csslink);
}
if (this.VerticalOrHorizontal == VerOrHor.Vertical && this.Direction == Directions.RightToLeft)
{
HtmlGenericControl csslink01 = new HtmlGenericControl("link");
csslink01.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.RightToLeft superfish-vertical.css"));
csslink01.Attributes.Add("type", "text/css");
csslink01.Attributes.Add("rel", "stylesheet");
csslink01.EnableViewState = false;
Page.Header.Controls.Add(csslink01);
}
else if (this.VerticalOrHorizontal == VerOrHor.Vertical)
{
HtmlGenericControl csslink01 = new HtmlGenericControl("link");
csslink01.Attributes.Add("href", Page.ClientScript.GetWebResourceUrl
(typeof(Menu), "MenuServerControl.CSS.superfish-vertical.css"));
csslink01.Attributes.Add("type", "text/css");
csslink01.Attributes.Add("rel", "stylesheet");
csslink01.EnableViewState = false;
Page.Header.Controls.Add(csslink01);
}
#endregion
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(CreateMenuHtmlTags());
}
StringBuilder CreateMenuHtmlTags()
{
if (this._MenuItems == null)
throw new Exception("تگ های مربوط به منو را کامل کنید");
StringBuilder Html = new StringBuilder("");
#region Add <Script>
if (String.IsNullOrEmpty(Main_ul_CssClass))
Html.Append("<script>$(document).ready(function() { $("ul.sf-menu").superfish({pathLevels: 1,");
else
Html.Append("<script>$(document).ready(function() { $("ul." + Main_ul_CssClass + "").superfish({ pathLevels: 1,");
Html.Append("delay:" + _AnimationDelay + ",");
Html.Append(_AnimationType + ",");
Html.Append(_AnimationSpeed + ",");
Html.Append("dropShadows: " + DropShadow.ToString().ToLower() + ",");
Html.Append(@"autoArrows: " + AutoArrows.ToString().ToLower() + "});});</script>");
#endregion
if (string.IsNullOrEmpty(Main_ul_CssClass) && VerticalOrHorizontal == VerOrHor.Vertical)
Html.Append("<ul class="sf-menu sf-vertical sf-js-enabled sf-shadow" id='sample-menu-1'>");
else if (String.IsNullOrEmpty(Main_ul_CssClass))
Html.Append("<ul class="sf-menu sf-js-enabled sf-shadow" id='sample-menu-1'>");
else
Html.Append("<ul class="" + Main_ul_CssClass + "" id='sample-menu-1'>");
foreach (MenuItem item in _MenuItems)
{
if (item == null) continue;
if (item.SubMenuItems != null && item.SubMenuItems.Count > 0)
{
Html.Append("<li" + item.li_CssClass + ">");
Html.Append("<a href="" + item.Href + "">" + item.Text.Trim() + "</a>");
ParseSubMenuItems(ref Html, item);
Html.Append("</li>");
}
else if (item.SubMenuItems != null)
Html.Append("<li" + item.li_CssClass + "><a href="" + item.Href + "">" + item.Text.Trim() + "</a></li>");
}
Html.Append("</ul>");
return Html;
}
void ParseSubMenuItems(ref StringBuilder Html, MenuItem menuItems)
{
if (menuItems == null) return;
Html.Append("<ul " + menuItems.ul_CssClass + " style="display: none; visibility: hidden;">");
foreach (var item in menuItems.SubMenuItems)
{
if (item == null) continue;
MenuItem Sub_MenuItem = item as MenuItem;
WebControl webControl = item as WebControl;
if (Sub_MenuItem != null)
{
if (Sub_MenuItem.SubMenuItems != null && Sub_MenuItem.SubMenuItems.Count > 0)
{
Html.Append("<li" + Sub_MenuItem.li_CssClass + ">");
Html.Append("<a href="" + Sub_MenuItem.Href + "">" + Sub_MenuItem.Text.Trim() + "</a>");
ParseSubMenuItems(ref Html, Sub_MenuItem);
Html.Append("</li>");
}
else if (Sub_MenuItem.SubMenuItems != null)
Html.Append("<li" + Sub_MenuItem.li_CssClass + "><a href="" + Sub_MenuItem.Href + "">" + Sub_MenuItem.Text.Trim() + "</a></li>");
}
else if (webControl != null)
{
Html.Append("<li>");
webControl.EnableViewState = true;
this.Controls.Add(webControl);
webControl.EnableViewState = true;
StringBuilder sb = new StringBuilder();
sb.Append("<div>");
using (StringWriter sw = new StringWriter(sb))
{
using (HtmlTextWriter textWriter = new HtmlTextWriter(sw))
{
webControl.RenderControl(textWriter);
}
}
sb.Append("</div>");
Html.Append(sb.ToString());
Html.Append("</li>");
}
}
Html.Append("</ul>");
}
#endregion
}
}
MenuItem.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
namespace MenuServerControl
{
[DefaultProperty("SubMenuItems")]
[ParseChildren(true, "SubMenuItems")]
[TypeConverter(typeof(ExpandableObjectConverter))]
public class MenuItem : INamingContainer
{
#region Fields
ArrayList _SubMenuItems;
string text = "";
string href = "#";
string _ul_CssClass = "";
string _li_CssClass = "";
#endregion
#region Properties
[Description("متن منو آیتم")]
[DefaultValue("")]
[NotifyParentProperty(true)]
public string Text
{
get
{
return text;
}
set
{
text = value;
}
}
[DefaultValue("#")]
[Description("<a /> href attribute")]
[NotifyParentProperty(true)]
public string Href
{
get
{
return href;
}
set
{
href = value;
}
}
[DefaultValue("")]
[Description("<ul /> css class")]
[NotifyParentProperty(true)]
public string ul_CssClass
{
get
{
if (string.IsNullOrEmpty(_ul_CssClass)) return "";
_ul_CssClass = " class="" + _ul_CssClass + """;
return _ul_CssClass;
}
set { this._ul_CssClass = value.Trim(); }
}
[DefaultValue("")]
[Description("<li /> css class")]
[NotifyParentProperty(true)]
public string li_CssClass
{
get
{
if (string.IsNullOrEmpty(_li_CssClass)) return "";
_li_CssClass = " class="" + _li_CssClass + """;
return _li_CssClass;
}
set { this._li_CssClass = value.Trim(); }
}
[Category("Behavior")]
[Description("The MenuItems collection")]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[PersistenceMode(PersistenceMode.InnerDefaultProperty)]
public ArrayList SubMenuItems
{
get
{
if (_SubMenuItems == null)
_SubMenuItems = new ArrayList();
return _SubMenuItems;
}
}
#endregion
}
}
You can download the project from here.
<input type="button" name="reset"
onclick="return ValidateValue(); __doPostBack('ApplyBtn','')" />
The above is the code generated for asp server button button control on browser. Now my query is that irrespective of ValidateValue() returning true/false __doPostBack('ApplyBtn','') function is not showing any effect for me. My understanding is that string passed to onclick acts like function body, and return will from first function will return control preventing second function from execution.
Is that correct?