i have a really annoying problem in that i need to programmatically create a SQLDatasource and then add it to my asp.net page on the load event. If I do this it all seems to work ok in terms of data binding but for all buttons on the page their postback events stop working?Is this a know issue or must I be doing something wrong?
View 3 RepliesI have a page called Page2.aspx and it is called by another page called Page1.aspx and Page1.aspx passes two parameters namely: Name and Category to Page2.aspx. Does anyone know why the following code from Page2.aspx is not working and it keeps giving an error message as follows: " You have declare the parameter @Username".
string Cat1;
string Name1;
[Code]....
For some reason I can't get the button event to fire...
This is my Accordion:
[Code]....
I dynamically add the panes and buttons...
[Code]....
These two should get fired - but they dont:
[Code]....
I read somewhere that I should add the button to the UpdatePanel
[Code]....
But when I do I get this error :
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Apropos MSDN link: [URL] [.NET Framework 4 - ASP.NET] Implementing Client Callbacks Programmatically Without Postbacks in ASP.NET Web Pages Using the code from the above link in the following code snippet, if you keep a break point on the statement "if (IsPostBack)" in the Page_Load event. The control moves into the "if (IsPostBack)" block after the alert, which mean that it is a Postback. Then, how come you say "...Without Postbacks"? I am getting confused here.
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ASPCS2008ClientCallbacksProgrammatically._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" [URL]>
<%@ Implements Interface="System.Web.UI.ICallbackEventHandler" %>
<script runat="server">
string aStringValue;
public void RaiseCallbackEvent(String eventArgument)
{
aStringValue = eventArgument;
}
public string GetCallbackResult()
{
return aStringValue;
}
protected void Page_Load(object sender, EventArgs e)
{............................................................
Apropos MSDN link:
[URL]
[.NET Framework 4 - ASP.NET]
In runtime I'm creating a DataTable and using nested for-loops to populate the table. This table I later assign as DataSource to a gridview and on RowDataBound I assign the value of each cell. I want to know how I can give each cell a button and assign that button to a codebehind function. I'll have 12 buttons and each one will contain a different value. I would prefer if they all call the same function with some kind of event that stores the cell-specific value. This is the code where the Table gets created:
[code]...
Can a endless loop in be interrupted and stopped somehow by clicking a button?
View 4 RepliesWhen I am setting the width of a column in a GridView I use the HeaderStyle-Width:
<asp:BoundField DataField="AnalysisId" HeaderText="ID" SortExpression="AnalysisId" HeaderStyle-Width="25px" />
<asp:BoundField DataField="AnalysisId" HeaderText="ID" SortExpression="AnalysisId" HeaderStyle-Width="25px" >
<HeaderStyle Width="25px"></HeaderStyle>
</asp:BoundField>
Two questions. First, is HeaderStyle-Width a preferred/best way to manage column width in a grid view? And second, how do I suppress the genration of the the additional code?
I have added some combobox and texboxes in gridview dynamically to provide the data entry like operations.i have fetched and reset the value of these dynamically added controls on button click as ->
[Code]....
[Code]....
assign updateParameter value to sqlDataSource programmatically?
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:InternalConnectionString %>"
I have been trying some things and got stuck in problem.
I created a Gridview and SQLDataSource in designer and a on Button event executed the following Code
GridView1.DataSourceId="SQLDataSource";
It worked Fine and populated the Grid View.
But when i Decided to PRogramatically Create SQLDataSource ANd populate the Gridview by the following code
SqlDataSource fd = new SqlDataSource();
fd.ConnectionString = "<%$ ConnectionStrings:ConnectionString %>";
fd.SelectCommand="select * from [Department]";
GridView1.DataSourceID = "fd";
it didnt work. And Gave the following Error
The DataSourceID of '' must be the ID of a control of type IDataSource...
Can the select command of a SqlDataSource be given by code in the code behind file. Also by calling the SqlDataSource.Select can the select statement be executed?
View 3 RepliesI am developing a web part that uses AJAX Timer and Update Panel to perform some data check. There are two buttons outside the Update Panel on the web part that I also want to maintain during the Timer postback. I cannot put these two buttons in any UpdatePanel because they need to call Response.Write() to display some Excel data to users in their On_Click event. My current solution is using ViewState to maintain these two button in On_Load event. However, I am not sure if this is a correct solution (haven't tested it). Does any one know that during a Timer postback, if I disable/enable these two buttons using ViewState in On_Load, will it update the page properly with the two buttons disabled/enabled? Or will it ignore any control that are not in the UpdatePanel regardless where you maintain it? If my solution is not a good practice, can someone suggest other alternatives?
View 1 RepliesI have a question about adding a ListItem to a DropDownList that is being bound by a SqlDataSource.
My Intention is to be able to add an item with something like "0" as a value and "--- Choose Something---" as the item.
However, the control is filled using a SqlDataSource for the DataSource.
So, the question is:
Is it possible to insert the value "0" and item "--- Choose Something---" to the control even though the control has a datasource from the database?
I have a SqlDataSource that calls a stored procedure and it works fine. If I add a <ControlParameter> tag to add an additional argument, then the query never fires and the databinding never occurs.
This works:
[Code]....
When I add the ControlParameter, the databinding no longer occurs:
[Code]....
The ControlParameter refers to a valid object on the page.
I use the sqldatasource control a lot with stored procedures. But this time I'm using some code I found online where I am defining the new sqldatasource in the code and using it. You can see this below. I am getting a NullReferenceException on the first SelectParameters line and not sure why. Do I need to add the parameters different?
Code:
Dim SqlDataSource As New System.Web.UI.WebControls.SqlDataSource()
SqlDataSource.ConnectionString = ConnectionString
SqlDataSource.SelectCommand = "MySprocName"
SqlDataSource.SelectCommandType = SqlDataSourceCommandType.StoredProcedure
SqlDataSource.SelectParameters("Distance").DefaultValue = 25
SqlDataSource.SelectParameters("ZipCode").DefaultValue = "31410"
Dim arg As New DataSourceSelectArguments()
Dim dv As System.Data.DataView = DirectCast(SqlDataSource.[Select](arg), System.Data.DataView)
I want to add StyleSheets programmatically in the head section but one of the examples I saw seemed to need to many lines of code to add just one style sheet even though I may need a lot: Example Code:
HtmlLink css = new HtmlLink();
css.Href = "css/fancyforms.css";
css.Attributes["rel"] = "stylesheet";
css.Attributes["type"] = "text/css";
css.Attributes["media"] = "all";
Page.Header.Controls.Add(css);
I also use Page.Header.RenderControl() method but it didn't work either. Object null something error was thrown. I also used Page.Header.InnerHtml and InnerText += "<link .... "/> things but they threw the Literal error which is I think common error. I used this code :
List<Literal> cssFiles = new List<Literal>();
cssFiles.Add(new Literal() { Text = @"<link href=""" + ResolveUrl("~/Resources/Styles/MainMaster/MainDesign.css") + @""" type=""text/css"" rel=""stylesheet"" />" });
cssFiles.Add(new Literal() { Text = @"<link href=""" + ResolveUrl("~/Resources/Styles/MainMaster/MainLayout.css") + @""" type=""text/css"" rel=""stylesheet"" />" });
AddStyleRange(cssFiles);
private void AddStyleRange(List<Literal> cssFiles)
{
foreach (Literal item in cssFiles)
{
this.Header.Controls.Add(item);
}
}
It worked at first but when I change the pages it stopped working. I am using Master Page and I am writing these codes on Master.cs file and also some people recommended to use this.Header instead of Page.Header but when I built it throws an error which says I cannot declare that like this. It shouldn't be that hard to add many styles.
I am using a gridview where i am calling a stored procedure which has 4 input parameters. Out of these 4 parameters, values are to be given such that DomainId = This has to be the row which is to be deleted. This is a primary key Domain = This field has to be passed to SP as NULL. Description= This field has to be passed as NULL. OperationType= This field has to be passed by programmer as some static value say 4 How to i need to specify these here... More details of the Question are here.
<DeleteParameters>
<asp:ControlParameter ControlID="GridView1" Name="DomainId"
PropertyName="SelectedValue" Size="4" Type="Int32" />
<asp:Parameter DefaultValue="" Name="Domain" Size="16" Type="String" />
<asp:Parameter DefaultValue="" Name="Description" Type="String" />
<asp:Parameter DefaultValue="4" Name="OperationType" Type="Byte" />
</DeleteParameters>
On running my code using this. I gets an error
Procedure or Function 'spOnlineTest_Domain' expects parameter '@Domain', which was not supplied
What I would like to achieve:
I would like a user to be able in insert a row into the listview. BUT not into a database.
What I am stuck on:
Currently I am stuck on the OnItemCommand, i dont seem to be entering the method. Code below.
[Code]....
I'm dynamically creating image buttons and want their click event to update an image in the update panel where only the panel updates- not the whole page.
I have created the image buttons click event and got it so that it updates the image in the update panel, but I can't seem to create the triggers- I keep getting the error 'Multiple Controls with the same ID' and I can't understand why.
Here's my code:
[Code]....
I have a user control that needs to load a child control when a button is clicked. The trouble is that it has to request the control from another class.
So in the button click event, I call the function to get me my control, and add it to the page, like this:
UserControl ctrl = ExampleDataProvider.GetControl(some params...);
myDetailPane.Controls.Add(ctrl);
The GetControl method looks like:
public static UserControl GetControl(some params...)
{
ExampleDetailPane ctrl = new ExampleDetailPane();
ctrl.Value = "12";
ctrl.Comment = string.Empty;
return ctrl;
}
This isn't working due to the page's lifecycle - the Page_Load of the child control gets fired and its controls are null.
I am developing a custom Web Interface Browser for Subversion Repositories with C#/ASP.NET and SVNKit (Converted to .NET assemblies using IKVM.NET). Is there any clean way to locally add a new subversion user (that is added by the administrator) using C# code?
View 1 RepliesI have a problem with adding programatically FilteredTextBoxExtender (i put the code below).
The problem is that nothing is outputed when page is renedered although TextBox and FilteredTextBoxExtender are added to container (table cell controls property in my case).
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recently i created a table programatically using c#.
now i want to format the table.
i want to give colors to the alternative rows of the table.
i am having the color values.(#E9F1F3,#98C1CA)
this is the code i have used to create rows and cells...
TableRow tr=new
TableRow();
TableCell tc = new
TableCell();
tc.Controls.Add(new
LiteralControl("...."));
tr.Cells.Add(tc);
DriverTable.Rows.Add(tr);
DriveTAble is the table name.
so i want to add colors to the rows..the colors should be in the hexadecimal code which i have specified above..
I need to do the following:
[Code]....
I've tried looking for examples but can only find something setting properties for animation. Is it actually possible?