This may sound simple, but I'm quite new to Visual Basic and ASP.net.
What I'm trying to do is create a new column in a ASP:GridView and create a link based on the value of another cell on that row.
Example Row:
Test Name | 123456 | http://www.testdomain.com/123456.pdf
123456 being the variable.
Hope you can help
You can use HyperLinkField (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.hyperlinkfield(v=vs.110).aspx)
<asp:HyperLinkField
DataTextField="EntityKey"
DataTextFormatString="http://www.testdomain.com/{0}.pdf"
DataNavigateUrlFields="EntityKey"
DataNavigateUrlFormatString="http://www.testdomain.com/{0}.pdf" />
You can put that link in an ItemTemplate
<ItemTemplate>
<asp:LinkButton ID="Button1" runat="server" PostBackUrl= 'http://www.testdomain.com' + '<%# Eval("ID") %>'></asp:LinkButton>
</ItemTemplate>
Related
So I have gridview pulling fields from a table and my hyperlinkfield is used to go to a specific page for that row to get more detailed data. Everything seems to work great except when the field used in the hyperlinkfield has an ampersand. I assume it is reading the ampersand as something else and so it doesn't bring up the proper info because the ampersand is in the name in the database.
Hyperlinkfieldcode:
<asp:HyperLinkField HeaderText="Name" Text="{0}" DataNavigateUrlFields="Name" DataNavigateUrlFormatString="item.aspx?name={0}" DataTextField="Name" />
Example:
A clicking on the name "test item" would take you to mysite.com/item.aspx?name=test%20item and this works.
However, clicking on "test & test item" it takes you to mysite.com/item.aspx?name=test%20item%20&%20item which does not work. It just pulls up a page with blank info.
What can I do to fix this?
Update:
I converted the hyperlinkfield to a hyperlink inside a template field, but the url is now coming out weird.the url now comes out like mysite.com/item.aspx?name=System.Int32%5b%5d
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:HyperLink runat="server" Text='<%#Eval("Name") %>' DataNavigateUrlFields="Name" NavigateUrl='<%# "name.aspx?name=" + HttpUtility.UrlEncode({0}.ToString())%>' DataTextField="Name" />
</ItemTemplate>
</asp:TemplateField>
My original answer was incomplete (due to not being able to see the entire code). This answer will contain the missing elements.
The main object is to UrlEncode the data field Name, so that it can be used as (part of) a url link .
1 - First we must ensure that the field "Name", is listed as DataKeyNames for the GridView as follows:
<asp:GridView ID="GridView1" runat="server" DataKeyNames="Name" ...
2 - Secondly (if using a navigateURL) create a TemplateField i.e. (asp:TemplateField ) and use Eval() method to access the DataField in conjunction with UrlEncode() .
<asp:TemplateField HeaderText="Name">
<ItemTemplate>
<asp:HyperLink ID="NameLink" runat="server" Text='<%# Eval("Name") %>' NavigateUrl='<%# "name.aspx?name=" + HttpUtility.UrlEncode(Eval("Name").ToString())%>' ></asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
Option 2 Alternatively you can use a HyperLinkField and DataNavigateURL but you should still designate Name as a DataKeyNames .
Hope this works with no problems. Let me know if any clarification is needed.
Happy coding and Cheers,
I have a TemplateField column in a gridview with a image button inside of it.
i need to use two command arguments within single image button.
here is my code
<asp:TemplateField ItemStyle-Width="30px">
<ItemTemplate>
<asp:ImageButton ID="btnAvaililabitly" runat="server"
ImageUrl="~/CMS/images/available_icon.png"
Width="12px" Height="12px" CommandName="availability"
ToolTip="Rooms Availability"
CommandArgument='<%#Eval("HotelID")%>'/>
</ItemTemplate>
</asp:TemplateField>
please help
You can send comma separated string and collect value on server side
CommandArgument= '<%# String.Format("{0} , {1}", Eval("Name1"), Eval("Name2")) %>'
I can't find any answer anywhere. I want to refer to the row object itself in an databinding expression in a gridview, like this:
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:Label runat="server"
Text = '<%# GetPendingReason(Eval("this")) %>' />
</ItemTemplate>
</asp:TemplateField>
But it doesn't work because "this" doesn't refer to any attribute. Referencing individual attributes works fine, but how do you refer to the current row?
Simply use <%# Container.DataItem %>. Do not use Databinder.
If you want to refer to the current row you do that at codebehind using
GridViewRow row = GridView1.Rows[index];
at any of the GridView event.
happy new year to all,
i am having a problem in counting subtotal in a gridview in asp.net
the gridview contains details like
sl .no item reading result
1 A [userentry]
2 [userentry]
3 [userentry] [labeltodispresult]
1 B [userentry]
2 [userentry]
3 [userentry] [labeltodispresult]
i need to calculate the sum of the user entry for each item and display into the resultant lable.
let me tell you what i have achived,
i am facing no problem at all in the gridview part.
when ever the user entry is made the value in the result lable should be updated,
i am binding a javascript function to the userentry textbox in rowdatabound event in code behind.
in the javascript i am able to roll over all the rows of table using jquery, and calculate the value.
here is the catch,
the labletodispresult should be for that item group only,
i.e. i need to get the sum of userentry for A -1,A-2, A-3 rows and seperately for B-1,B-2,B-3 rows,
the i am using a class for the userentry textbox,
and using this
<asp:gridview id="gv1" runat="server">
<columns>
<ItemTemplate headertext="sl.no">
<asp:label id="lblslno" runat="server" text='<%# Eval("slno")%>' />
</ItemTemplate>
<ItemTemplate headertext="Item">
<asp:label id="lblItem" runat="server" text='<%# Eval("Item")%>' />
</ItemTemplate>
<ItemTemplate headertext="readings">
<asp:TextBox id="txtReadings" runat="server" class="readings" />
</ItemTemplate>
<ItemTemplate headertext="result">
<asp:label id="lblresult" runat="server" />
</ItemTemplate>
</columns>
</asp:gridview>
jquery part:
function calculate(){
$('.readings').each(function(){
sumval +=parseFloat($(this).val());
});
}
this gives me all the textboxes sum value, but i need the values based on the Item group.
i am at a fix
any help?
Here is one thing you can try.
Set the class of your textbox = your item i.e.
CssClass='<%# Eval("Item")%>'
That is one way to differentiate your textboxes based on item. Then get your textbox based on that class.
So in this gridview, there is a column for status and I want to have a drop down list with Pass, Pending, Fail appear when the edit button is clicked. These values are already in a table, so I need to somehow bind from this table to each ddl for every row.
Here is the column from the gridview. As you can see, I would like to just have a label showing when not in edit mode, and a ddl when the edit button is pressed
<asp:TemplateField HeaderText="During Production Status" SortExpression="DuringProductionStatus">
<EditItemTemplate>
<asp:DropDownList ID="ddlStatus" runat="server" datavaluefield="Name"
datatextfield="Name" DataSource="*What goes here?*"> />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="lblStatus" runat="server"
Text='I don't understand how to get this from the ddl' />
</ItemTemplate>
</asp:TemplateField>
For clarity's sake, my table is named Status, and the database is named DirectImport
There's a few steps to go through here - none of them are particularly difficult, but they can be a bit fiddly (IMHO). The good news is once you've got this working once, it gets easier to do it again!
I'm assuming you've got a <asp:*DataSource> control on your page - my preference is for an ObjectDataSource but I don't think it matters, I think a SqlDataSource works equally well. I've never tried doing this with GridView.DataSource = MyDataSet in code-behind, so I don't know whether that would work or not, but my assumption is that it wouldn't as you wouldn't get the proper two-way binding that you want. This data source feeds your grid with your main data. The key point here is that your database query must return both the Status text field and the Status id.
So your gridview will now look something like:
<asp:objectdatasource runat="server" id="MainDataSource" ... />
<asp:gridview runat="server" id="MyGridView" DataSourceID="MainDataSource">
<Columns>
<asp:TemplateField HeaderText="During Production Status" SortExpression="DuringProductionStatus">
<ItemTemplate>
<asp:Label ID="lblStatus" runat="server"
Text="<%# Bind('Status') %>" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:gridview>
The Text="<%# Bind('Status') %>" is the bit you're missing to get the status text into the grid.
Now add a second data source into your markup that reads in the set of values from the Status table.
<asp:objectdatasource runat="server" id="StatusObjectDataSource" ... />
And add the EditItemTemplate into the GridView, which is bound to the Status DataSource.
<EditItemTemplate>
<asp:DropDownList ID="ddlStatus" runat="server" datavaluefield="StatusID"
datatextfield="Status" DataSourceID="StatusObjectDataSource"
SelectedValue="<%# Bind('StatusId') %>" />
</EditItemTemplate>
The SelectedValue="<%# Bind('StatusId') %>" is what connects up the two datasets so that when you flip a row into Edit mode, the dropdownlist has the correct item already selected, and when you then save it you've got the Status ID to put into your database.
And you're done.
I have used the RowDataBound event. Here is a small code snippet. HTH
you would have an ItemTemplate in your aspx/ascx
<asp:TemplateField HeaderText="Column Headings">
<ItemTemplate>
<asp:DropDownList ID="ddlName" runat="server" Width="150"></asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
and in your code behind, you will have
protected void grdDataMap_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddl = (DropDownList)e.Row.FindControl("ddlName");
ddl.DataSource = someList;//the source of your dropdown
ddl.DataBind();
}
}
so when you bind your grid with grdDataMap.Databind (assuming your grid id is grdDataMap), row databound event will be called for each row (including header/footer, and thats the reason you check RowType)
so you can probably decide what controls/columns to hide/show/bind inside this row databound event
In the winforms world I pull my objects from the DB into a List(Of Whatever) and use the list as the datasource.
This also lets me add extra "convenience" fields in the object so that I can populate it with stuff from other tables.
I don't know asp.net at all so if you can do something similar, it might help.
A really quick solution is to create a custom web control for the status dropdown. The control will always contain the same data. When it renders you populate the datasource. When it gets added to the gridview, the data will be in the drop down. Hope that helps!