I have been searching for hours and can not find a solution. i was wondering is there a way to add sql data to a tool tip in ASPX? At the moment i have a GridView which shows information from a database. The final column is a total column, i would like the tool tip to show how the total was got.
What would be the best way to do this? I am using vb codebehind for this project.
Thanks
Make the cell of your grid view that holds the total value be a server control, like Label, and then bind the text to the ToolTip property of control like this:
<asp:Label id="LabelTotal" runat="server" ToolTip='<%# Eval("Formula") %>' />
Obviously, this means you need to have a property named "Formula" in the list of objects you are binding to your grid view or a database column named "Formula".
Related
I am trying to create a specific aspx page where I display clickable links based on information in a sql database. For example one column could be the anchor tag another column could be the path to the link itself etc. In the past I would pull this information from sql and put it into a non-visible Label (say linkLabel1). Then in the page itself I would insert <%linkLabel1.text%> to insert the link path from the database to the appropriate area.
I hope I'm not confusing things too much here and that makes sense how I explained it.
What I would like to do is set up a way that I could simply enter a new row into a SQL table with link information and a web page automatically displays the new link for me.
I guess I am mostly looking for insight, opinions, or directions of what approach to consider. I can elaborate if I was unclear (wouldn't be awfully surprising if I was not).
Thanks in advance for anyone's time on this matter.
Since you are displaying this in a table, you could use a GridView for this. The columns that will display the link could be defined as hyperlink columns as so:
<Columns>
<asp:HyperLinkField
HeaderText="Header text"
DataNavigateUrlFields="PropertyContainingTheHRefForTheAnchor"
DataTextField="PropertyContainingTheTextForTheAnchor"
/>
</Columns>
So for example, if you return a record set containing these columns:
TextProperty PathProperty
See Details Assets/SomeOther/
Click me Products/AnotherPath/
Your grid will render these as:
See Details
Click me
If you define the column as:
<Columns>
<asp:HyperLinkField
HeaderText="Header text"
DataNavigateUrlFields="PathProperty"
DataTextField="TextProperty"
/>
</Columns>
suppose my images binary data is saved in database table and i want to show those images through gridview. one approach is just create one page where i will pass some id as query string and that page will retrieve the image data from db and stream down the image data to my page through BinaryWrite method. a example is http://www.aspdotnetcodes.com/Insert_Images_Database.aspx. this url describe how to show image data through BinaryWrite.
this approach is old and i know. is there any other way by which i can show the image in gridview but i don't want to store image url in table.please let me know if you know any other approach for showing the images through gridiview when image binary data is stored in db. thanks
I asked a similar question here:
Streaming Databased Images Using HttpHandler
Note that I had to use a DataReader in my final version :-)
It sounds like you've got your images stored in your database in binary format. You then want to show them in your GridView.
Consider this approach:
create a template field in your gridview to hold your image. It'll end up calling a handler URL to grab the binary data for your image.
create the image handler page -- make it an .ashx. Put a unique identifier on the querystring, for example, to grab the image you want from the database
<Columns>
<asp:TemplateField HeaderText="Image">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" Height="80px" Width="80px"
ImageUrl='<%# "ImageHandler.ashx?ImID="+ Eval("ImageID")
%>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
See the answer at the bottom of this MSDN question for more details on how to implement your image handler. You then won't have to bring back the binary data when binding your GridView. On the other hand, it creates n calls to the handler for each row in the grid.
The scenario I'm dealing with is I have a set of entries in a database that have an image associated with them. This image needs to be 'accepted' or 'rejected' via a web interface.
I'm using ASP.NET WebForms.
I'm attempting to databind my recordset of entires to a CheckBoxList control. I would like to combine data from my dataset with information from the web.config file and plain text to display an image:
<asp:CheckBoxList ID="CheckBoxList1" runat="server"
DataSourceID="DataSource1"
DataTextField="ImageIdentifier"
DataValueField="EntryId"
DataTextFormatString="<img src='<%$ AppSettings:GetImageUrl %>{0}' />" />
This approach correctly outputs the plain text and the DataTextField value, however it does not interpret the code inside the <% %> block and prints the whole thing literally in the generated HTML, in spite of it being correctly highlighted in the editor.
Is this possible to achieve declaratively? If not, is there a better way than iterating through the entries in the list in code on the OnDataBound event?
Thanks in advance,
Jamie
I believe you're using the wrong <% tag. In order to evaluate in a binding expression like that it should be <%#
What does your web.config look like? You'll won't be able to use that binding syntax here - you'll have to hook into the databound event of the checkbox and iterate each checkbox, updating them as necessary from the values in your web.config.
EDIT
If you don't want to iterate each checkbox after the checkboxlist has been databound, you'll have to update your dataset first, before you bind to it.
There is no asp:HiddenField that can be used in a GridView so I was wondering what would work similar to this.
My reasoning for wanting this is I have a ButtonField that triggers an OnRowCommand. From there I can figure out which row was selected, but I cannot retrieve the text value from the ButtonField to see the data that was bound to it (through DataTextField).
My solution to this was to have a BoundField and just retrieve the text value from it instead, since I already knew which row was selected. This worked, but I need it to be hidden.
Someone suggested using a HiddenField nested within a TemplateField, but I had troubles retrieving the text value from that HiddenField. Is there some way to access the control within the TemplateField to get the text value of the HiddenField?
If anyone has any suggestions for alternatives that would be great as well.
Thanks,
Matt
You can use a template field with the commandArgument equal to the the ID of the record/row.
<ItemTemplate>
<asp:Button ID="Button1" runat="server" CausesValidation="false"
CommandName="SomeCommand" Text="Button" CommandArgument='<%# Eval("SomeID") %'></asp:LinkButton>
</ItemTemplate>
Then, in the row command handling event you can get that value by e.CommandArgument
You can use the DataKeyNames property on the Gridview.
gridView.DataKeyNames = { "values", "you", "want "};
and then you can access them like this:
gridView.DataKeys[rowId].Values["value"];
is it possible to add another ID column, as a unique representative for a record(row) ? That particular ID column can be set with style: display=none in order to hide it, but still the ID is inside the HTML form.
and then you can retrieve the value of that particular ID column to be processed further.
hope this helps,
hadi
I'm coming from a Rails background and doing some work on a ASP.NET project (not ASP MVC). Newbie question: what's the easiest way to make a custom editor for a table of records?
For example: I have a bunch of data rows and want to change the "category" field on each -- maybe a dropdown, maybe a link, maybe the user types it in.
In Rails, I'd iterate over the rows to build a table, and would have a form for each row. The form would have an input box or dropdown, and submit the data to a controller like "/item/edit/15?category=foo" where 15 was the itemID and the new category was "foo".
I'm new to the ASP.NET model and am not sure of the "right" way to do this -- just the simplest way to get back the new data & save it off. Would I make a custom control and append it to each row? Any help appreciated.
You can REALLY cheat nowadays and take a peek at the new Dynamic Data that comes with .NET 3.5 SP1. Scott Guthrie has a blog entry demoing on how quick and easy it'll flow for you here:
http://weblogs.asp.net/scottgu/archive/2007/12/14/new-asp-net-dynamic-data-support.aspx
Without getting THAT cutting edge, I'd use the XSD generator to generate a strongly typed DataSet that coincides with the table in question. This will also generate the TableAdapter you can use to do all your CRUD statements.
From there, bind it to a DataGrid and leverage all the standard templates/events involved with that, such as EditIndex, SelectedIndex, RowEditing, RowUpdated, etc.
I've been doing this since the early 1.0 days of .NET and this kind of functionality has only gotten more and more streamlined with every update of the Framework.
EDIT: I want to give a quick nod to the Matt Berseth blog as well. I've been following a lot of his stuff for a while now and it is great!
There are a few controls that will do this for you, with varying levels of complexity depending on their relative flexibility.
The traditional way to do this would be the DataGrid control, which gives you a table layout. If you want something with more flexibility in appearance, the DataList and ListView controls also have built-in support for editing, inserting or deleting fields as well.
Check out Matt Berseth's blog for some excellent examples of asp.net controls in action.
Thanks for the answers guys. It looks like customizing the DataGrid is the way to go. For any ASP.NET newbies, here's what I'm doing
<asp:DataGrid ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:BoundColumn DataField="RuleID" Visible="False" HeaderText="RuleID"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="Category">
<ItemTemplate>
<!-- in case we want to display an image -->
<asp:Literal ID="litImage" runat="server">
</asp:Literal>
<asp:DropDownList ID="categoryListDropdown" runat="server"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
This creates a datagrid. We can then bind it to a data source (DataTable in my case) and use things like
foreach (DataGridItem item in this.GridView1.Items)
{
DropDownList categoryListDropdown = ((DropDownList)item.FindControl("categoryListDropdown"));
categoryListDropdown.Items.AddRange(listItems.ToArray());
}
to populate the intial dropdown in the data grid. You can also access item.Cells[0].text to get the RuleID in this case.
Notes for myself: The ASP.NET model does everything in the codebehind file. At a high level you can always iterate through GridView1.Items to get each row, and item.findControl("ControlID") to query the value stored at each item, such as after pressing an "Update" button.