<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" Width="637px" CssClass="auto-style1">
<Columns>
<asp:HyperLinkField DataNavigateUrlFields="TimeStamp" DataNavigateUrlFormatString="Logs.aspx?TimeStamp={0}" DataTextField="TimeStamp" HeaderText="TIME STAMP"></asp:HyperLinkField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SoneilCloudRemConnectionString %>"
SelectCommand="SELECT [TimeStamp] FROM [SensorLogData] WHERE ([deviceId] = #deviceId)">
<SelectParameters>
<asp:Parameter DefaultValue="121313131" Name="deviceId" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
The above is the code snippet used for displaying date with hyperlink. For me it displays just the date instead of it to be hyperlink. In my SQL the datatype for this date is in "datetime" format.
I tried using other field to display in hyperlink, it's working. Finding issue only for datetime.
The Gridview won't build a URL containing : (which is in the time portion of Timestamp). This results in an <a> tag being created with no href.
If you can live without the time, you can change the DataNavigateUrlFormatString to only use the date portion:
DataNavigateUrlFormatString="Logs.aspx?TimeStamp={0:d}"
Another option is described here. It would involve formatting Timestamp to a specific format & then parsing the querystring Timestamp using `DateTime.ParseExact().
DataNavigateUrlFormatString="Logs.aspx?TimeStamp={0:yyyy-MM-dd hh-mm-ss}"
Then on Logs.aspx:
DateTime.ParseExact(Request.QueryString("Timestamp").ToString(), "yyyy-MM-dd hh-mm-ss", System.Globalization.CultureInfo.CurrentCulture)
Related
I am using Visual Basic for ASP. NET
I know how to populate a gridview with data using only code behind, like this
Dim ds as new datasourse
Dim da as new dataadaptor
Dim con as new SqlConnection
Dim cmd as new SqlCommand
...
Cmd = "select ticketID, problem_text from problems where support_engineer = " & Session("Logged_in_user_id")
...
Gridview1.Datasource = ds
Gridview1.Datasources. DataBind
And that works fines, but my question is: how can i drag and drop a gridview control, and using only the wizard to populate the gridview in design time, how can i define the SELECT statement to only select rows that are related to the logged in user id? See the sql statement above, it uses a session variable that i create in Page_Load event, but how can i use the same logic in design mode? (i don't want to modify the datasource control in code behind)
I looked in youtube and google, and this sites, but all results are simply showing me how to populate the gridview with all rows or with a static condition, not a dynamic one like the one i demonestrated.
Any help is highly appreciated
You could try replacing the form tag in the aspx file
<form id="form1" runat="server">
<div>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:TestConnectionString %>"
SelectCommand="SELECT ticketID, problem_text FROM Tabs WHERE (support_engineer = #Param1)">
<SelectParameters>
<asp:SessionParameter Name="Param1" SessionField="Logged_in_user_id" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="True"
DataSourceID="SqlDataSource1">
</asp:GridView>
</div>
</form>
I found out the proper way of binding the gridview to a dynamic session variable, without involving code behind:. Simply use the property <SessionParameter> inside the <SelectParameter>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:TestConnectionString %>"
SelectCommand="SELECT ticketID, problem_text FROM problems
WHERE (support_engineer = #eng_id)
<SelectParameters>
<asp:SessionParameter
Name="eng_id"
SessionField="LoggedInUser"
Type="String" />
</SelectParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="True"
DataSourceID="SqlDataSource1">
</asp:GridView>
I am working with a brilliantly designed table, where the primary key column contains a #: OTTXN#
I need to be able to select and display these values in the GridView which is populated from my SqlDataSource, which is working fine.
When i add FilterExpression=" = '{0}'" then the code craps out on me, because the column name has a hash tag / pound symbol in it.
I'm able to alter the select statement to use an alias without the pound symbol, but SQL where clauses dont allow you to use a column alias.
Any way i can get this to work?
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="dsIseries">
<Columns>
<asp:BoundField DataField="OTTXN#" HeaderText="OTTXN"
SortExpression="OTTXN#" />
<asp:BoundField DataField="OTWODT" HeaderText="OTWODT"
SortExpression="OTWODT" />
<asp:BoundField DataField="OTBAD1" HeaderText="OTBAD1"
SortExpression="OTBAD1" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="dsIseries" runat="server"
ConnectionString="<%$ ConnectionStrings:VM520ConnectionString %>"
ProviderName="<%$ ConnectionStrings:VM520ConnectionString.ProviderName %>"
SelectCommand='SELECT ottxn#, otwodt, otbad1
FROM kivalib.ortxnpf
fetch first 100 rows only'
FilterExpression=" = '{0}'">
<FilterParameters>
<asp:ControlParameter ControlID="txtSearch" PropertyName="Text" />
</FilterParameters>
</asp:SqlDataSource>
EDIT
Without making changes to the database... is there a way i could query the columns from the code-behind and pass the results back to the SqlDataSource or GridView with the values & altered column name?
I would create a VIEW in the DB that includes all the relevant columns with better names and then query from that view.
I have a project I'm making with Visual Studio 2010 and ASP.NET Web Forms. In it, I have a GridView control that I bound to a MySQL table. It displays my table in the control without a problem, but after I enabled editing on the control I found I had problems updating fields in the table when the field has a space in it.
For example, I have the following table defined:
CREATE TABLE `test_table` (
`oid` int(11) unsigned NOT NULL AUTO_INCREMENT,
`first_column` varchar(20) NOT NULL,
`second_column` varchar(20) NOT NULL,
`third column` varchar(20) NOT NULL,
PRIMARY KEY (`oid`)
)
Note one of the fields has a space in the name. This is where I have problems. In my page, I have the following code:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="oid" DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowEditButton="True" />
<asp:BoundField DataField="oid" HeaderText="oid" ReadOnly="True"
SortExpression="oid" />
<asp:BoundField DataField="first_column" HeaderText="first_column"
SortExpression="first_column" />
<asp:BoundField DataField="second_column" HeaderText="second_column"
SortExpression="second_column" />
<asp:BoundField DataField="third column" HeaderText="third column"
SortExpression="third column" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testcon %>"
ProviderName="<%$ ConnectionStrings:testcon.ProviderName %>"
SelectCommand="select * from test_table" UpdateCommand="update `test_table` set
`first_column` = #first_column,
`second_column` = #second_column
where
`oid` = #oid"></asp:SqlDataSource>
By way of the UpdateCommand, I am able to update first_column and second_column on this table just fine. Now I want it to update third column the same way, but it doesn't work. If I change the query to this:
update `test_table` set
`first_column` = #first_column,
`second_column` = #second_column,
`third column` = #third column
where
`oid` = #oid
It will give me this error when the query runs:
Parameter '#third' must be defined.
I've also tried #third\ column, #{third column}, #[third column], {#third column} - obviously none of these work. Therefore my question is: what do I put for my update query to be able to update my MySQL field that has a space in it?
You should be able to use any parameter name through the update parameters
http://www.asp.net/web-forms/tutorials/data-access/accessing-the-database-directly-from-an-aspnet-page/inserting-updating-and-deleting-data-with-the-sqldatasource-vb
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testcon %>"
ProviderName="<%$ ConnectionStrings:testcon.ProviderName %>"
SelectCommand="select * from test_table" UpdateCommand="update `test_table` set
`first_column` = #first_column,
`second_column` = #second_column
where `oid` = #oid">
<UpdateParameters>
<asp:Parameter Name="first_column" Type="String" />
<asp:Parameter Name="second_column" Type="String" />
<asp:Parameter Name="third_column" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>
A solution to this situation is to provide an alias name to the column in the Select statement that populates the Gridview. For example:
SELECT ..., [third column] AS third_column, ...
FROM ...
And then you can use #third_column as the parameter name. Since I anticipate that you may want to show the column header with a space instead of an underscore, you can set the HeaderText property of this field to what you want.
With this approach, the Update command of the GridView will easily map to the corresponding parameter (since they have the same name) and you don't have to change the definitions in your database. I also recommend using SQLServer Profiler to see the actual T-SQL code that is executed in the server.
Good luck!
I'm trying to bind a column from a SQL code that i have written to all hyperlinks in a datalist. This should be really simple but I'm getting the error
DataBinding: 'System.Data.Common.DataRecordInternal' does not contain
a property with the name 'NumberOfComments'.
Well I'm pretty sure the column exist but in this case it's created by a function maybe that has something to do with it. When I run the SQL code i get the values I should.
The hyperlink
<asp:HyperLink ID="lnkComment" runat="server"
NavigateUrl='<%# Eval("ID", "~/Default.aspx?ID={0}") %>'
Text='<%# Eval("NumberOfComments") %>'></asp:HyperLink>
The SQLDataSource
<asp:SqlDataSource ID="sdsNews" runat="server"
ConnectionString="<%$ ConnectionStrings:ASPNETDBConnectionString %>" SelectCommand="SELECT News.ID, News.Topic, News.Text, News.PostTime, aspnet_Users.UserName, "NumberOfComments" = dbo.fnNumberOfCommentOnNews(News.ID)
FROM News INNER JOIN
aspnet_Users ON News.UserId = aspnet_Users.UserId
WHERE (News.ID = ISNULL(#ID, News.ID))
ORDER BY News.PostTime DESC ">
<SelectParameters>
<asp:QueryStringParameter DbType="Guid" Name="ID" QueryStringField="ID" DefaultValue="" />
</SelectParameters>
</asp:SqlDataSource>
Why do you have """ surrounding NumberOfComments FieldName?
Try pasting the select command into SSMS (SQL Server Mgmt studio) and you should most definitely get an incorrect syntax error. If you drop those quot html code you will still be able to reference and bind to that column.
In ASP.NET, what is the definitive way to pull one record from the database and bind it and HTML tag? Brevity and style points count.
For brevity, you'll want to use the SqlDataSource.
<asp:SqlDataSource ID="sql" runat="server" ConnectionString='<%$ ConnectionStrings:MyConnectionString %>'
SelectCommandType="Text"
SelectCommand="select MyField FROM MyTable WHERE ID = #id"
>
<SelectParameters>
<asp:ControlParameter ControlID="txtUserName" PropertyName="Text" Name="id" />
</SelectParameters>
</asp:SqlDataSource>
<asp:BulletedList runat="server" DataTextField="MyField" DataSourceID="sql">
</asp:BulletedList>
It's not clear what you want but, detailsview control is designed for displaying only one record from data source.
DetailsView is a data-bound user
interface control that renders a
single record at a time from its
associated data source, optionally
providing paging buttons to navigate
between records.