I have a gridview with a hyperlink inside an TemplateField. The NavigateUrlFormat will be populated from the Web.Config file, it has the following format:
mysite.com/{0}
Where {0} will be populated from the gridview datasource, however, my current code doesn't work:
<asp:TemplateField HeaderText="WorkOrder #">
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server"
NavigateUrl='<%# Eval("WorkOrderKey", "<%$ AppSettings:DispatchLink %>") %>'
Text='<%# Eval("WorkOrderKey") %>'></asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
The problem is right after "AppSettings:DispatchLink", it closes the tag when it see "%>". Is there a way around this problem?
Thank you,
Kenny.
You cannot nest <%# and other tags. Use ConfigurationManager.AppSettings["DispatchLink"] (pls. lookup correkt Class/Property in MSDN) instead.
Or: If your are using that HyperLink Control more than once I would suggest that you create an own MYHyperLink derived from System.Web.UI.WebControls.HyperLink and set the Property NavigateUrlFormatString in your Constructor.
Something like this:
public class DispatchLink : System.Web.UI.WebControls.HyperLink
{
public DispatchLink()
{
this. NavigateUrlFormatString = ConfigurationManager.AppSettings["DispatchLink"]
}
}
Related
Is there someway to turn the row of a gridview into a hyperlink so that when a user opens it in a new tab for example, it goes to that link? Right now I am using a LinkButton and when the user opens it in a new tab, it doesn't know where to go.
I figured the .aspx code would look something like:
<asp:TemplateField>
<ItemTemplate>
<Hyperlink ID="hyperlink" runat="server" ForeColor="red" HtmlEncode="false" navigationURL="testUrl.aspx"
</ItemTemplate>
</asp:TemplateField>
The only thing is, our URLs are set up in the C# code behind as a query string, so I'm not sure how to pass that into the navigationURL section.
I'm guessing there's something I can do on the page_load with the query string to redirect to the page I need, but this is my first time working with query strings so I'm a little confused.
Thanks!
<asp:TemplateField>
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#String.Format("~/controller.aspx?routeID1={0}&routeID2={1}", Eval("routeid1"), Eval("routeid2"))%>'></asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
routeid1 and routeid2 are passed as query strings to the controller of that page.
What I did recently is modified my class to have a readonly property that constructs the A tag for me. This way I have control over what gets displayed; just text or a link.
<ItemTemplate>
<asp:Label ID="ColumnItem_Title" runat="server" Text='<%# Bind("DownloadATag") %>'> </asp:Label>
</ItemTemplate>
The code behind just binds an instance of the class to the gridview. You can bind the gridview whenever, on load on postback event, etc.
Dim docs As DocViewList = GetViewList()
GridViewDocuments.DataSource = docs
GridViewDocuments.DataBind()
In the above code, the DocViewList, instantiated as docs, is a list of a class that has all the properties that are needed to fill my GridView, which is named GridViewDocuments here. Once you set the DataSource of your GridView, you can bind any of the source's properties to an item.
Something like:
<asp:LinkButton ID="LinkButton_Title" runat="server" target="_blank"
PostBackUrl='<%# Eval(Request.QueryString["title"]) %>'
or binding them from the RowCreated event:
protected void GridView_OnRowCreated(Object sender, GridViewRowEventArgs e)
{
if(e.Row.RowType == DataControlRowType.DataRow)
{
(e.Row.FindControl("LinkButton_Title") as LinkButton).PostBackUrl = Request.QueryString["title"]))
}
}
When I add a user control which has bindable properties to an asp.net page I do not see its bindable properties on the designer's dialog box when I click the edit Data bindings on the Repeater-Listview
should I add any other propery descriptors?
the markup would be like this inside a repeater or similar control
<uc1:Menu ID="Menu1" superman="<% Eval("userid") %>" runat="server" />
on the bindable property I only use
[System.ComponentModel.DefaultBindingProperty("superman")]
[System.ComponentModel.Bindable(true)]
public int superman
{
get;
set;
}
People discuss it here but they couldn't find a solution
I think this might be a problem with Visual Studio, I have not found a way to show the properties of user controls, but still, you can bind the property even when it does not appear in the options box:
This is how you bind it:
In the user control code behind:
[Bindable(true)]
public string MyProperty
{
get
{
return this.lblMessage.Text;
}
set
{
this.lblMessage.Text = value + DateTime.Now.ToString();
}
}
In the ASCX file:
<asp:Label ID="lblMessage" Text="something" runat="server" />
In the ASPX page:
<asp:DataList runat="server" ID="dataList" Width="50%"
DataSourceID="ObjectDataSource1">
<ItemTemplate>
<uc1:WebUserControl1 runat="server" ID="myUC" MyProperty='<%# Eval("Name") %>' />
</ItemTemplate>
</asp:DataList>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server"
SelectMethod="GetProducts" TypeName="WebApplication1.Repository">
</asp:ObjectDataSource>
Simple just add the property you created in your UC in the tag:
<uc1:WebUserControl1 runat="server" ID="myUC" MyProperty='<%# Eval("Name") %>' />
This is the output:
I think you just make the markup by typing it,
the user control must be drag and drop to the page in the design view.
try this may helps.
OK I have a GridView and there is a column that I want to be a link if a file exists, otherwise I just want it to be a label. Right now I am changing the controls on RowDataBound event handler using the Row passed in the args. I am not a big fan of this as I am hard coding the column ID, and if it ever changes I will need to remember to change this code. I was hoping I could do a conditional in the asp code to add a link if a property value is not null otherwise add a label. Is this possible? Any different solutions?
I would like something like this:
<asp:TemplateField HeaderText="Status">
<ItemTemplate>
<%# if (Eval("LogFileName") == null)
<%#{
<asp:LinkButton ID="LogFileLink" runat="server" CommandArgument='<% #Eval("LogFileName") %>' CommandName="DownloadLogFile" Text='<%# Blah.NDQA.Core.Utilities.GetEnumerationDescription(typeof(Blah.NDQA.Core.BatchStatus), Eval("Status")) %>'>
<%# }
<%# else
<%#{
<asp:Label ID="LogFileLabel" runat="server"Text='<%# Blah.NDQA.Core.Utilities.GetEnumerationDescription(typeof(Blah.NDQA.Core.BatchStatus), Eval("Status")) %>'>
</asp:Label>
</ItemTemplate>
</asp:TemplateField>
You can continue to use RowDataBound event but in your aspx you add:
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
In your C# code something like that:
if (LogFileName) {
LinkButton ctrl = new LinkButton();
ctrl.CommandArgument= ...;
ctrl.CommandName= ...;
} else {
Label ctrl = new Label();
ctrl.Text= ...;
}
// You have to find the PlaceHolder1
PlaceHolder1.Controls.Add(ctrl);
In this way you don't have to hard coding the column ID
I know this is a little old now but just in case someone else stumbles across this as I did when looking for an answer to a similar question, I found you can do something like this:
<ItemTemplate>
<asp:ImageButton ID="btnDownload" runat="server"
CommandName="Download"
CommandArgument='<%# Eval("Document_ID") & "," & Eval("Document_Name") %>'
ImageUrl="download.png" ToolTip='<%#"Download " & Eval("Document_Name") %>'
Visible='<%# Not(Eval("Document_ID") = -1) %>' />
</ItemTemplate>
i.e. set the Visible property to evaluate a boolean expression based on your field. If you wanted to display something instead of the download link or button, such as a "Not available" label, then you would just set its Visible property to the opposite boolean expression to your download link. (This is VB.NET not C#, but you get the idea.)
If you're going to be doing this a lot, I suggest writing your own field. The simplest approach is probably to make a NullableHyperlinkField inheriting from HyperlinkField, and render out a plain string if the anchor's URL would otherwise be null.
Use properties on the page to determine if you want to show the label or the link
<asp:GridView ID="gv" runat="server">
<Columns>
<asp:TemplateField HeaderText="Status">
<ItemTemplate>
<asp:LinkButton runat="server" Visible='<%# ShowLink %>' PostBackUrl="~/Aliases.aspx" >This is the link</asp:LinkButton>
<asp:Label runat="server" Visible='<%# ShowLabel %>'>Aliases label</asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
The add the properties ShowLink and ShowLable toyour code behind
public bool ShowLabel
{
get
{
//determine if the label should be shown
return false;
}
private set
{
//do nothing
}
}
public bool ShowLink
{
get
{
//determine if the link should be shown
return true;
}
private set
{
//do nothing
}
}
I databing array of User objects to GridView control. Last column contains "action" anchors (edit, remove):
<asp:TemplateField HeaderText="Actions">
<ItemTemplate>
Remove
Edit
</ItemTemplate>
</asp:TemplateField>
However I would like not to output first anchor to Remove action if currently binded User object has the same id as use logged in (available with this.SessionUser.Id).Something like this:
<asp:TemplateField HeaderText="Actions">
<ItemTemplate>
Remove
if (this.SessionUser.Id <> Eval("user_id") { Edit }
</ItemTemplate>
</asp:TemplateField>
How can I do it?
Thanks!
You can use a runat="server" control for this
<asp:TemplateField HeaderText="Actions">
<ItemTemplate>
Remove
<a href="Edit.aspx?id=<%# Eval("user_id") %>" runat="server"
visible='<%# this.SessionUser.Id <> Eval("user_id") %>'>Edit</a>
</ItemTemplate>
</asp:TemplateField>
All server controls, even HTML tags with runat="server" have this Visible property, which omits the control from the final HTML when it is false.
not supported :( you need to write another function passing it user_id and get the appripriate string from it like this:
//in cs file
protected string GetLink(object o)
{
if(!SessionUser.Id.Equals(o)) //or anyother way to compare equality
return string.Format("<a href=\"Edit.aspx?id={0}\">",0);
return "";
}
//in aspx file
<ItemTemplate>
Remove
<%# GetLink(Eval("user_id"))%>
</ItemTemplate>
you can use CSS:
<a style='visible:<%# this.SessionUser.Id <> Eval("user_id") %>' > ... </a>
make sure that this.SessionUser.Id is a public variable in your .cs file
I wish there was a ToolTip field in HyperLinkField as there is one in HyperLink.
I'm creating a HyperLinkField by code before binding to my data source:
HyperLinkField hl = new HyperLinkField();
hl.DataNavigateUrlFields = new string[] { "col" };
hl.DataNavigateUrlFormatString = "{0}";
hl.DataTextField = "Foo";
Is there any way to also set a value to something which will render as a tooltip (or alt text)?
Any help will be appreciated.
That's correct, there's no tooltip/alt text property in a HyperlinkField. To get around this shortcoming, you need to use a template field and add a regular Hyperlink control.
<asp:TemplateField HeaderText="Href">
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#
Eval("Href") %>' Text='<%# Eval("Href") %>' ToolTip='<%# Eval("Text") %>'>
</asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
However, doing this in a programmatic requires a lot of work. You need to create your own class that implements the ITemplate interface. Here's a tutorial on that.
Your requirement can be accompished in <asp:HyperlinkField> itself by adding tooltip for that specific cell in RowDataBound event of a GridView. After binding the GridView to your DataSource you can do this in a RowDataBound event as follows:
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Cells[0].ToolTip = "Your tooltip text";
}
Though you have accepted another answer, my answer may be helpful for some other users!