I have a GridView and one of the columns has a TemplateField using a LinkButton (ButtonField)
I can get the value of a specific cell in my Grid Just fine. Using:
GridViewRow row = GridView1.SelectedRow;
lblSalesmanCustomers.Text = row.Cells[2].Text;
I then display the text from that cell in a Label.
However I cannot get this to work with a ButtonField Template. It only works with a non Template column.
How can I get the value of a specific cell in a column that is using a ButtonField / TemplateField?
EDIT: This is My Button Field Code inside my GridView:
<asp:ButtonField DataTextField="Customer" HeaderText="Customer" ButtonType="Link" CommandName="Select" />
Also, this is happening in this event:
protected void gvManagerCustomers_SelectedIndexChanged(object sender, EventArgs e)
See if var Button = row.Cells["Customer"].Controls[0]; would retrieve the button you need.
You might need to cast it to the correct type.
I know there are issues with hyperlinkfield and buttonfield but there is a work around. Say you are binding buttonfield text based on a column called ButtonNames, and in that column you have all your names, such as "button bob", "button jerry" etc. In your GridView, add an invisible column as your very first column and bind its value as ButtonNames. You make it invisible by setting one of the visibility properties. Forgot what it was from top of my head. Then, when you want to get the text for the buttonfield simply get the data from that invisible column instead Same applies to hyperlinkfiends.
EDIT: here's some code.
<asp:BoundColumn ItemStyle-HorizontalAlign="Left" DataField="ButtonNames" SortExpression="ButtonNames" HeaderText="TriageId" Visible="false" ReadOnly="true"></asp:BoundColumn>
Then you retrieve it via string s = e.Item.Cells[0].Text where e is a DataGridCommandEventArgs or something to that nature.
There will be a controls collection in the cell - you may be able to access it there.
Though a simpler way would be to use something like:
Label l = row.FindControl("myControlId");
EDIT: true the exact approach above does not work - but you can use the controls, the following does work, note that what we are doing here is pretty much rife with bad practices (but then we are using a GridView for convenience sake after all).
protected void gvManagerCustomers_SelectedIndexChanged(object sender, EventArgs e)
{
var x = ((sender as GridView).SelectedRow.Cells[0].Controls[0] as LinkButton).Text;
}
In order to figure this out set up a debug environment and breakpoint in the handler method then drill down through the class hierarchy. The debugger is our friend ;)
EDIT just to mention the obvious - the column is hard coded here - you will probably have to change it.
Related
I'm using ASP.NET 4.0
and here is the HTML code:(GridView)
<asp:commandfield showeditbutton="true"
edittext="abc"
canceltext="Discard2"
updatetext="Revise"
headertext="Edit Controls"/>
No matter what I specify as EditText or updatetext they both always show as "Edit". canceltext shows correctly:
Update: My apologies for late update as I got this spaghetti huge code from someone who left:
I have no distant clue why he uses the following code in RowDataBound:
if (theServiceLineIsEditable)
{
editLinkButton.Text = "Edit";
}
else
{
editLinkButton.Text = "";
}
This clearly overrides the EditText and updateText behavior.
Can anyone think of any use of that code?
Looks to me like the person before you was trying to hide the Edit button on specific conditions when the better option would be to just set visibility to false. I have used this type of code before in a condition when a check has been posted so we do not want the user to be able to edit the check information anymore.
The reason for using above code in RowDataBound is that whenever you bind your GridView with DataSource GridView1.DataBind();, it always calls the RowDataBound event of GridView in which you can apply formatting and can customize your rows and cells of GridView and also its Text or Data.
I have this BoundField in a GridView
<asp:BoundField DataField="ReportId" HeaderText="RId" Visible="false" />
But when I try to get text in that field, it returns empty.
protected void gvwReports_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "ViewSchedule")
{
int index = Convert.ToInt32(e.CommandArgument);
GridViewRow row = gvwReports.Rows[index];
string s = row.Cells[0].Text;
}
}
but, it returns a correct value if I change BoundField's .Visible property to true
try somethink like this using client side html to hide
<style type="text/css">
.hidden
{
display:none;
}
</style>
<asp:BoundField DataField="ReportId" HeaderText="RId" HeaderStyle-CssClass="hidden" >
</asp:BoundField>
Although it's an year old question (in fact exactly an year old), here's another workaround without using CssClass.
Just after the databind, set visibility of the desired column to false.
gridview1.databind()
gridview1.columns(i).Visibile = False
This will maintain data in viewstate but will not create markup for page.
the first solution works correctly, but it was necessary add HeaderStyle to hide the header of this column
<style type="text/css">
.hidden
{
display:none;
}
</style>
<asp:BoundField DataField="ReportId" HeaderText="RId" >
<ItemStyle CssClass="hidden"/>
<HeaderStyle CssClass="hidden"/>
</asp:BoundField>
According to my knoweldge when you have made the bound field invisible then you can not access it. Try using TemplateField
I just had the same problem.
Funnily enough a DataGrid won't have that problem, it will allow you to access the data from hidden columns even though it doesn't even render them in the client, because it still adds the information of the hidden columns to the ViewState.
A GridView on the other hand simply ignore the hidden fields even if you set the EnableViewState property to true. The only way is to leave the information there for the client to hide with a style property, like display: none;.
Unfortunate really, I liked the DataGrid behaviour on that, but GridView has other advantages.
Seems that if a GridView column is marked as not visible it is not populated at run time so it returns nothing. So, I just populated the Hyperlink from the DataView that is bound to the Gridview remembering to declare the DataView as shared.
I did this in VB asp.net for a GridView that finds searched events from a calendar database.
This worked great for me!
Private Sub GridView1_RowDataBound(sender As Object, e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If (e.Row.RowType = DataControlRowType.DataRow) Then
Dim ThisHyperLink As HyperLink = e.Row.Cells(0).Controls(0)
Dim drvRow As DataRowView = dvFoundEvents.Item(e.Row.DataItemIndex)
EventID = drvRow("EventID")
ThisHyperLink.NavigateUrl = "<URL>?id=" + EventID
End If
End Sub
This worked for me:
If the column is a named DataKeyValue on your grid, you can cast the e.Item sent from the row as a DataGridItem and call its DataKeyValue. You'll need to convert it to Int, String, whatever but it will be there even if the column is visible=false.
At rowDataBound event you can access the field's value using something like:
(((DataRowView)e.Row.DataItem)["your_boundField_dataFieldName"]).ToString();
even if your boundfield visibility is set to false.
I would like to change the text of the autogenerated "select" column in an ASP.NET GridView control. The text needs to be changed to the value of a DataField.
I suspect that there is a very logical way to do this but I am missing it.
I am able to add controls and data via the pre-render event but is there an easier better way?
Use the TemplateField and place into it buttons or linkbuttons with appropriate CommandName property: ButtonField.CommandName Property
You may set this button text using DataBinder.Eval method.
The easiest way I found to do this is after the calling DataBind() just before the gridview control is displayed.
foreach (GridViewRow row in gvAgreementList.Rows)
{
LinkButton lb = (LinkButton) row.Cells[0].Controls[0];
lb.Text = "Edit";
}
after <column> write this:
<asp:CommandField ShowSelectButton="True" SelectText="Save" />
and remove AutoGenerateSelectButton="True" from Gridview attribute.
First remove auto generated select then go to GridView tasks.. top right Button of GridView and then click on commandfields -> Select then edit SelectText.
(Edited answer of ShaileshK with some changes)
Go to GridVIew tasks.. top right Button of GridView and then click on edit columns
In selected fields section Click on select field. change the value of select text.
done.
I'm trying to add HyperLinkColumns dynamically to my GridView. I have the following code:
HyperLinkColumn objHC = new HyperLinkColumn();
objHC.DataNavigateUrlField = "title";
objHC.DataTextField = "Link text";
objHC.DataNavigateUrlFormatString = "id, title";
objHC.DataTextFormatString = "{2}";
GridView1.Columns.Add(objHC);
This doesn't work, so.. how can i add a HyperLinkColumn to my GridView?
You might want to add it when the row is binded:
protected void yourGrid_RowDataBound(object sender, GridViewRowEventArgs e)
{
HyperLink hlControl = new HyperLink();
hlControl.Text = e.Row.Cells[2].Text; //Take back the text (let say you want it in cell of index 2)
hlControl.NavigateUrl = "http://www.stackoverflow.com";
e.Row.Cells[2].Controls.Add(hlControl);//index 2 for the example
}
You have to do it before the DataBinding takes place, check the GridView Events.
I think you should be using a HyperLinkField not a HyperLinkColumn.
In case, if you just want to redirect to another URL then simple use HyperLink web control and push it in the desired cell of GridView Row at RowDataBound event.
OR
If you want to perform any server event before sending it to another URL, try this
1) Add LinkButton object at RowDataBound event of GridView.
2) Set the CommandName, CommandArgument property, if requried to pass any data to this object.
3) Capture this event by handling the RowCommand event of the GridView.
By the way, I just think that you can use the DataGridView and in the Designer select the Link column and your problem would be over. The DataGridView does have a link column, than you just need to add an event on "Click" and you will be able to have what you want. This solution works if you can switch to DataGridView.
I know this thread is old but couldn't help adding my 2 cents. The procedure explained in the following tutorial worked perfectly for me:
ASP Alliance
It seems you have got things mixed up. I don't know - how that code compiles?
GridView's column collection can accept columns of type "DataControlField".
I think you need to initialize HyperLinkField and set relevant properties (text, NavigateUrl, HeaderText, Target) and add it to the columns collection.
HyperLinkColumn class is meaningful when you are using DataGrid (not in case of GridView).
Hope that helps.
I have a report page that can display two different reports. So I have a GridView with no columns on my aspx page. I am adding 4 BoundFields to the GridView in the button click event handler. The first column is the one I need to set the width of for one of the reports (the code I'm using to add this column is below).
gvReport.Columns.Clear();
BoundField bf1 = new BoundField();
...
if (ddReportType.SelectedValue == "full") {
bf1.HeaderText = "Facility";
bf1.DataField = "Facility";
bf1.ItemStyle.Wrap = true;
bf1.ItemStyle.Width = 150;
bf1.Visible = true;
gvReport.Columns.Add(bf1);
...
The problem is there is one row that has a SHA512 hash in this column. Since there is no space in the middle of it, the gridview won't wrap it (I think that's what is happening, anyway)! So I thought I'd catch this column in the OnRowDataBound event and add a space in the middle of the hash so it will wrap, but I can't figure out how to reference the BoundField. There's no ID property. Does anyone have a suggestion? Either on how to reference the BoundField, or another way to get this to display nicely?
I had the columns in the aspx file originally and tried using:
gvReport.Columns[0].ItemStyle.Width = 150;
gvReport.Columns[0].ItemStyle.Wrap = true;
but that didn't work either. This is very frustrating!
So we went with Plan C. I never did figure out how to reference the BoundField. We got around that problem by creating two GridViews in the markup and just changing which one is visible. To solve the problem of the text that won't wrap, we're catching it in the OnRowDataBound event handler and checking the length of the text. We just insert a space in the middle, and voila! It wraps!
The BoundField is a wrong thing. It is more like a definition. Later, when binding or creating rows, you are dealing with rows, cells, and data items.
You could do something like this:
protected void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string value = e.Row.Cells[1].Text;
if (!string.IsNullOrEmpty(value))
e.Row.Cells[1].Text = value.Insert(value.Length / 2, " ");
}
}
where Cell[1] is the column containing long values. In the same place, you could use e.Row.DataItem to get actual data, but then you'd need to know its type.
You could create a template field and bind to an expression or use its child's data bound event to do the same.
Also, if you were using a DataSet, you could set up calculated field and bind to it. Anyway...