I'm currently running with this.
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Works find on initial page load, but gives me "Object variable or With block variable not set."
on this like "ColourHex = e.Item.DataItem("ColourHex")" on postback?
i have a list view , which displays 10 dataitems at a time?
i want to increase it 25?
I have a datalist and I am filling it using a dataadapter, dataset. So in my .ascx page, I have
<asp:datalist runat="server" id="dlProducts" repeatcolumns="2" repeatdirection="horizontal">
<itemtemplate>
<table border="0">
<tr><td><%# Eval("Item_Name") %></td></tr>
<tr><td>I have to add a picture here</td><td><%# Eval("First_Name") %></td></tr>
</table>
</itemtemplate>
</asp:datalist>
In the area where I have put a statement like "I have to add a picture here", I have write a big case statement. Like:
Case: 6 // show a picture from file1
case: 7 // show a picture from file2
Case 8: //show a picture from file3
So How do I do this here? Because I dont know how to access the datalist values from code behind.
Here is my code behind:
SQLString = "SELECT First_Name, Picture, item_name, item_id from table1 where item_id = " + request.querystring["iid"];
dataadapter daItems = new dataadapter(SQLString, "connection_name");
dataset dsItems = new dataset();
daItems.fill(dsItems);
dlProducts.datasource = dsItems();
//So at this point how do I populate the picture in the <TD> tag I mentioned earlier?
Am using datalist to create a kinsd of message board, in the back end am having two tables one for the parent comment , and other for the child comments
The data source is extracted by LINQ to SQL with the load option , so I get everthing when I debug on the code behind , and I can see all the fields each parent comment and the child comments.
the problem is with binding the data on the disply for example all the parent table fildes can be rendred without any problems:
<%# DataBinder.Eval(Container.DataItem, "comment1Parent") %>; "showing me the orginal post"
Problem here:
<%# DataBinder.Eval(Container.DataItem, "Childcomment") %> is not rendred and I got this error msg:
DataBinding: 'DataAccessLayer.Comment' does not contain a property with the name 'childComment'.
In the debug I navigate to the childComment and this is its HTML visualisar:
new System.Linq.SystemCore_EnumerableDebugView<DataAccessLayer.Comment>(((ASP.usercontrols_comments_ascx)this).Comments)).Items[0]._comments_Replies.entities.items[0].childComment
I tried
<%# DataBinder.Eval(Container.DataItem, "_comments_Replies.childcomment")
Same as above error came to me.
I've been playing with a certain detailsview for most of last week. This particular control is located within a panel that is hidden until a user clicks a linkbutton on a gridview. Then the panel's visible property is set to true and the detailsview is populated based on the commandargument passed through the link button. What I've discovered is that with each postback, the datakey or control parameter, still not sure which or if both, is lost. I've discovered a lot about ViewState and how controls work and am a bit surprised that something as common as using a detailsview within a gridview wouldn't be handled better than it is now. I have been able to get the proper information to build a correct select statement when the user decides to edit a record. I am now working on an update statement, but for some reason while I have the right key to update the right record, I am unable to access the user-generated data that was entered in the details view.
For instance, I select record with ID of 1 in the gridview. It pulls up the detailsview and I can view it. I then click edit. The correct record is still there. (It was previously going to default). When I enter new text in a textbox and click update, the app still knows I am working with record #1 but doesn't seem to be able to find the textbox control. I have currently hard-coded a value into the field just to see if I could actually get the record to update and it did. I am using an OnInit to cause the sub to run and think this might be the problem. However, I have been unable to find a better way around this.
Here is the sub that executes on the OnInit() of the detailsview:
Protected Sub notes_binding()
If notesDetail.CurrentMode = DetailsViewMode.Edit Then
sqlNotesUpdate.UpdateCommand = "UPDATE [Oilchange_Notes] SET [notes] = '" & CType(notesDetail.FindControl("notes"), Textbox).Text & "' WHERE [vehicle_id] = " & Session("unitNumVal")
sqlNotesUpdate.UpdateCommandType = SqlDataSourceCommandType.Text
sqlNotesUpdate.Update()
End If
sqlNotesUpdate.SelectCommand = "SELECT * FROM [Oilchange_Notes] WHERE ([vehicle_id] = " & Session("unitNumVal") & ")"
End Sub
And this is the error I get: Object reference not set to an instance of an object. If I'm correct about why it's not pulling the actual value or even acknowledging the control exists and is actually 'notes' (it is), then at would point would be the best to place this code?
I've got a label in the item template tag of the datalist control. The label is bound to an integer column in the data source.
What I want to achieve is to retrieve the number from that label and change its text according to what number is retrieved.
i.e. if number retrieved = 1 then
lbl.text = "SomeText"
My problem is that I don't know how to code that label as it is found in the <ItemTemplate> of the datalist and intellisense cannot identify the label.
Is it possible for me to code that label using code behind? or is there any other way to do this?
I want to access my checkbox in code behind. I have my checkbox in my aspx file like this:
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And i'm trying to set the checkbox visible=false like this but it's not working. Error message: Object reference not set to an instance of an object.
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This is just one thing i want to do with my controls in my datalist, so i don't want to in my aspx file like this:
<asp:CheckBox ID="CheckBox1" runat="server" Visible='<%# if(Eval("isFolder")="1","false","true") %>' />
Because i have quite a lot of things i would like to do in the code behind when i'm getting my files..
Is it possible somehow to achieve this without having to put servercode in my aspx file?
I use a datalist to display one record from a database
one field contains html tags
I bind it to a label in the itemtamplate
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but i wont work , the formated text do not appear
It works with a detailsview , but it wont work with a datalist
The Datalist is being databound via an ObjectDataSource and everything here works fine. I have a label which I've added to my datalist and it's unbound to anything. Depending on the message information, I want this unbound label to display a certain phrase but it has to be next to a bound label. But if I try to change the text of the label in the code-behind, VS2k8 reports that the label is not declared. How do I do this?
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I've got a few labels in a datalist that are being populated based on the values of a queryString but without the query string the datalist is empty.
How can I access the labels in the datalist and set a default value to them on the load of the page?
I have the following:
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How to pass image id from datalist radiobutton to server side code
I have the following code the form of a datalist,
<asp:DataList ID="DataList1" runat="server" BorderColor="black" CellPadding="3" Font-Names="Verdana"
Font-Size="8pt">
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I need to create a DataList from code behind.
The structure of that DataList shold be as follows:
<asp:DataList ID="DataList1" runat="server" RepeatDirection="Horizontal" RepeatColumns="5" CellPadding="6">
<ItemTemplate>
<table> <tr><td>
<asp:Label ID="lblName" runat="server" ForeColor="Red" Text='<%#Eval("ID") %>'></asp:Label>
</td></tr> </table>
</ItemTemplate>
</asp:DataList>
The problem is that i have a search page. Access Database holding the information. I have a Access Datasource on the page with a Datalist to show the data. I need to find a way on setting it up to says "Sorry no results found" when the is no results. i am unsure on how to do this though.
Below is my datasource and datalist
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Am building a Form for out intranet that runs on ASP.NET and C#, it is to be a survey from a SQL database. I have the connections setup can pull informations/Questions from the database. I am having a problem with setting up radio buttons within a datalist, ive never done this and i know they require unque names.
It is to be 4 radio buttons per question where only one can be select, i know how to group just not via a datalist with unique names
How can I do paging with datalist if that datalist is populated with inputs coming from a querystring?
View 3 RepliesI need to find which Selected Key value that was selected in the ChildDatalist inside the MainDatalist
this is my Html code...for the MainDataList and the nested Childdatalist
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I am trying to place a datalist inside datalist. I managed to place a datalist inside gridview but not datalist inside datalist.
Below is the code I am using to bind the datalist into the master gridview, I am trying to change this code in such way it will be right for datalist inside datalist but so far I did not succeed.
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i have a datalist . that is contains 7 columns in repeat layout .when i have more from 7 columns , datalist style is normal .but when i have smaller than 7 columns ! data list style is not normal,
because there are some empty columns without specific schema.
How i can make a datalist > when i have 1 columns in my datalist my first layout width be 100% ;
and dont show some empty layout ?
I have a class that derives from System.Web.UI.Page and have set my pages to derive from this custom page class instead of Page. At runtime, the controls are never initialized and throw a NullReferenceException. I've changed some class names and namespaces in the pasted code to protect the innocent. The only thing that I currently override in my PageBase is OnPreLoad and I do call the base.OnPreLoad. I'll eventually add more functionality to this PageBase but for now all that it has is this:
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I've tried putting this into a class library (with System.Web referenced) and I've also tried moving the class into the web application and had the same results either way. As another strange twist, I have another class with derives from PageBase called IndexPageBase and it doesn't have this problem:
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I created a user control in Asp.Net which I populate with <asp:Table id = "...." /> this table has columns that contain dropdownlists, textfields and other web controls. In the code behind I am not able to access these web controls, is there a way I can access them. or I shouldn't be doing that in the code behind of the user control? here is my ascx code markup:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MarriageControl.ascx.cs" %>
<%@ Register assembly="BasicFrame.WebControls.BasicDatePicker" namespace="BasicFrame.WebControls" tagprefix="BDP" %>
<asp:TextBox ID = test runat = "server" />
<asp:Table ID = "marriageInfoTable" runat = "server" Caption="معلومات الزواج"
CellPadding="2" CellSpacing="2" Width="979px" Height="164px">
<asp:TableRow runat="server">
<asp:TableHeaderCell runat = "server" Text = " " />
<asp:TableHeaderCell runat = "server" ID = "husbandHeader" Text = "الزوج" HorizontalAlign = "Right" />
<asp:TableHeaderCell runat = "server" ID = "wifeHeader" Text = "الزوجة" HorizontalAlign = "Right" />
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell runat = "server" Text ="الاسم الرباعي" />
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameHusbandTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
<asp:TableCell runat = "server">
<asp:TextBox runat ="server" ID = "fullNameWifeTextBox" Height = "30px" Width = "250px" Font-Bold = "true" Font-Size = "20px"/>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow runat="server">
<asp:TableCell ID="dateOfBirthCell" runat = "server" Text ="تاريخ الميلاد" />......
I know in standard VB.Net development, you can access any form field from within a module class but I'm not sure how to do it using Web Forms.Here is my scenario:I have a Module.vb where I am putting all my Database Functionality. In each of my functions, I'm using a Try Catch construct.
View 7 RepliesI have a page called Article.aspx that takes content from the database. I would like to use the title of the content as the title of the page for a little SEO I am doing. I setup a literal on the aspx page that must take the value of the content title from the code behind, what is the best way about doing this? I'm guessing I need to open a data base connection to read the record from the table but I am still learning asp.net and not sure how to write it
View 22 RepliesI have a button on the page and a gridview with checkboxes on the first column. The gridview is bound to a List. On buttonClick, I need to retrieve the underlying bound data item (MyEntity) for each selected row. How can I do this? I can't simply recreate MyEntity based on the gridview columns, because I am not displaying all the fields of MyEntity. I need a way to get a hold of MyEntity based on the key (MyEntityId).
View 2 RepliesI am trying to access a webcontrol (a Textbox) from the EditItemTemplate of a DataList, so I can change it. When I try to do DataList.FindControl("TextboxID") it comes back with null because it doesn't recognize the textbox has rendered. I've tried looking in the DataBinding, DataBound events and those don't work either.
To be more specific, I need to change the value of a textbox when the user uses a Calendar control, so I need to access the control from EditItemTemplate in the Calendar_SelectionChanged event.
Code:
protected void calendar1_SelectionChanged(object sender, EventArgs e)
{
// Access EditItemTemplate Control
}
<asp:DataList ID="DataListMaintenance" runat="server"
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