Develop Reference

How to add conditional button in template field gridview?

I have one gridview that contains some fields, I want to show button in TemplateField when Process field has value.
Here is my code:
<asp:GridView ID="grdList" PageSize="20" runat="server" DataSourceID="ODList" AllowPaging="True"
AllowSorting="True" PagerSettings-Position="Top" AutoGenerateColumns="False"
ShowFooter="True" ShowHeaderWhenEmpty="True" OnPageIndexChanged="grdList_PageIndexChanged">
<Columns>
<asp:BoundField DataField="MeasureCatalogId" SortExpression="MeasureCatalogId" />
<asp:BoundField DataField="MeasureName" SortExpression="MeasureName" />
<asp:TemplateField SortExpression="Process">
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Process") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("LevelId") %>'></asp:TextBox>
</EditItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<%if(????????) -- want condition for process!= ""
{
%>
<img class="semPopup" sempopupurl='<%=Constant.AppPath %>/forms/baseform/MeasureProcessFromCatalogForm.aspx?t=2&lid=<%# Eval("LevelId") %>&mid=<%# Eval("MeasureCatalogId") %>'
sempopupwidth="<%=width %>" sempopupheight="<%=height %>"
src="../../App_Themes/images/select2.gif" />
<%} %>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<PagerSettings Position="Top"></PagerSettings>
<PagerStyle CssClass="grid_pager" />
</asp:GridView>

As an alternative to the other recommendations; you could try using a code expression on the field:
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<img class="semPopup" sempopupurl='<%=Constant.AppPath %>/forms/baseform/MeasureProcessFromCatalogForm.aspx?t=2&lid=<%# Eval("LevelId") %>&mid=<%# Eval("MeasureCatalogId") %>'
sempopupwidth="<%=width %>" sempopupheight="<%=height %>"
src="../../App_Themes/images/select2.gif" Visible='<%# ShowButton(Eval("Process")) %>'/>
</ItemTemplate>
</asp:TemplateField>
I have not tried this out, but it follows a similar pattern to what i have previously used. The code expression calls the codebehind function 'ShowButton' which should return a bool, here you can evaluate the value of process passed in, and if it is to your liking, pass back a true value; otherwise return false and the button will not show.
C#
protected bool ShowButton(object DataItem)
{
//Here you can place as many conditions as you like
//Provided you always return either true or false
if (DataItem != null)
return true;
else
return false;
}
A suggested edit was posed in a similar fashion, however instead of a bool visibility, the visibility setting is altered by string value. I am sure they will add their take too. After all, variety is the spice of life

Use codebehind, make the button visible when appropriate:
protected void gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRow row = ((DataRowView)e.Row.DataItem).Row;
string process = row.Field<string>("Process"); // change type from string to whatever it is
Button btn = (Button) e.Row.FindControl("ButtonID");
btn.Visible = process == "YourProcessValue";
}
}

you can make use of RowDataBoundand than make decision of hiding your control
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
SomeObject mapItem = (SomeObject)e.Row.DataItem;
if(!mapItem.Process)
(e.Row.Cells[3].FindControl("Buttonid") as Button).visible= false;
}
}
or try
<ItemTemplate>
<asp:Button runat="server" Text="Reject"
Visible='<%# ((bool)Eval("Process")) %>' />
</ItemTemplate>

Create hyperlink button cells in gridview using C# asp.net

I am having a GridView in my web page. Which is displaying the data with the columns as Status, Name , Id and Action. My status column always filled with the 3 values(Complete, Queued and Failed) randomly.
Now I want to display this status column values as a link ,If it is having the value either "Failed" or "Queued". But "Complete" status should not be display as a link.
How Can I achive this design during the runtime?
My Code for binding the data into the grid is,
protected void Page_Load(object sender, EventArgs e)
{
DataTable dtActionList = clsactionList.GetADActionList();
grdADActionList.DataSource = dtActionList;
grdADActionList.DataBind();
}
protected void grdADActionList_RowDataBound(object sender, GridViewRowEventArgs e)
{
foreach (GridViewRow gvr in grdADActionList.Rows)
{
if ((gvr.FindControl("Label1") as Label).Text == "Completed")
{
(gvr.FindControl("Label1") as Label).Visible = true;
(gvr.FindControl("HyperLink1") as HyperLink).Visible = false;
}
}
}
using this code I am just simply binding the values in the grid. I am not able to create the Status column as having link buttons based on the binded values for that status column.
My .aspx Code is:
<asp:GridView ID="grdADActionList" runat="server" Height="83px" Width="935px" AutoGenerateColumns="false" OnRowDataBound="grdADActionList_RowDataBound">
<Columns>
<asp:TemplateField HeaderText="Status" SortExpression="Status">
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='http://localhost:52807/Default.aspx?'><%# Eval("Status") %>
</asp:HyperLink>
<asp:Label ID="Label1" runat="server" Text="<%# Container.DataItem %>" Visible="False"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="GivenName" HeaderText="GivenName"/>
Please help me to do this further....

On GridViewDataBound event, just hide the link and display a simple label if the value is complete.
ASP.NET:
<asp:TemplateField HeaderText="Status" SortExpression="Status">
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='your_url'>
<%# Eval("Status") %>
</asp:HyperLink>
<asp:Label ID="Label1" runat="server" Text="<%# Eval("Status") %>" Visible="False"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
C#:
protected void onGridViewDataBound()
{
foreach(GridViewRow gvr in grd)
if((gvr.FindControl("Label1") as Label).Text.ToLower() == "complete") // Updated Line
{
(gvr.FindControl("Label1") as Label).Visible = true;
(gvr.FindControl("HyperLink1") as HyperLink).Visible = false;
}
}

you have to work in design file means .aspx file
you have to use and
<asp:GridView ID="GridView1" runat="server" EnableModelValidation="True">
<asp:TemplateField HeaderText="Hyperlink">
<ItemTemplate>
<asp:HyperLink ID="HyperLink1" runat="server"
NavigateUrl='<%# Eval("CODE", #"http://localhost/Test.aspx?code={0}") %>'
Text='link to code'>
</asp:HyperLink>
</ItemTemplate>

You can place an handler on RowDataBound event
protected void gw_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView v_DataRowView = (DataRowView)e.Row.DataItem;
string NavigateUrl = <....place your link here with DataRowView info>
e.Row.Attributes.Add("onclick", NavigateUrl);
}
}

For now you have your columns auto generated, so first disable that feature. Then you need to define each column as a BoundField, and for the hypelink, taking into account your condition, the best way is to define template field:
<asp:GridView ID="grdADActionList" runat="server" BorderStyle="Double" BorderWidth="3px"
Height="83px" Width="935px"
AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Name" HeaderText="Name"/>
<asp:BoundField DataField="Action" HeaderText="Action"/>
<asp:BoundField DataField="Id" HeaderText="Id"/>
<asp:TemplateField HeaderText="Status">
<ItemTemplate>
<asp:HyperLink runat="server" NavigateUrl="~/link/address" Text='<%# Eval("Status") %>'
Visible='<%# (int)Eval("Status") != 1 %>'/>
<asp:Label runat="server" Text='<%# Eval("Status") %>'
Visible='<%# (int)Eval("Status") == 1 %>'>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Note that this is just a variation - you have not specified what values does Status column contain, so I assumed this is int-based enumeration.

Checkboxfield value controls button visibility

I have a gridview which displays the contents of a database table in rows. There is a CheckboxField there and a Select button. I want to set button visibility to false when checkboxfield is checked.
this is my aspx page:
<asp:DetailsView ID="DetailsViewERgo" runat="server" Height="50px"
Width="100%" AutoGenerateRows="False" CellPadding="4"
DataSourceID="LinqDataSourceErgo" ForeColor="#333333" GridLines="None"
HeaderText="Σύντομη Περιγραφή Επιλεγμένου Έργου">
<Columns>
<asp:CheckBoxField DataField="Diekperewsi" HeaderText="Answered"
SortExpression="Diekperewsi" Visible="True"
ItemStyle-HorizontalAlign="Center">
<ItemStyle HorizontalAlign="Center" />
</asp:CheckBoxField>
<asp:TemplateField HeaderText="Insert Answer" ShowHeader="False">
<ItemTemplate>
<center>
<asp:Button ID="Button1" runat="server" CausesValidation="False"
CommandName="Select" Text="Επιλογή" Visible="true" >
</asp:Button>
</center>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I have tried this but only works with checkboxes
protected void GridViewAitima_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
CheckBox cb = (CheckBox)e.Row.FindControl("Diekperewsi");
Button b = (Button)e.Row.FindControl("Button1");
if (!cb.Checked)
{
b.Visible = false;
}
else
{
b.Visible = true;
}
}
}

Your code will run on the server side but it looks as if the the AutoPostBack property for your checkbox is not set to true -
AutoPostBack="True"
so when the checkbox is checked the code will not run immediately, it will only run after another event has caused your page to postback.

CheckBoxField has no id thus you can't find it by id, moreover it has no value propertie.
I suggest you use template field just like you used for the button, but instead put a checkbox in it.
so instead of :
<asp:CheckBoxField DataField="Diekperewsi" HeaderText="Answered"
SortExpression="Diekperewsi" Visible="True"
ItemStyle-HorizontalAlign="Center">
<ItemStyle HorizontalAlign="Center" />
</asp:CheckBoxField>
put :
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="Diekperewsi" Enabled="false" Checked='<%#Eval("Diekperewsi")%>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
and you are good

How to edit an entire column for all rows asp:GridView

So I have google'd and searched stackoverflow, and now my brain is overloaded. I am a novice at asp.net, but getting the hang of it.
My current requirement is to have a gridview where upon load, 1 column for all rows is immediately placed into edit mode. I used this question and code to get me going:
Allowing one column to be edited but not another
<asp:gridview id="CustomersGridView"
datasourceid="CustomersSqlDataSource"
autogeneratecolumns="false"
autogenerateeditbutton="true"
allowpaging="true"
datakeynames="CustomerID"
runat="server">
<columns>
<asp:boundfield datafield="CustomerID" readonly="true" headertext="Customer ID"/>
<asp:boundfield datafield="CompanyName" readonly="true" headertext="Customer Name"/>
<asp:boundfield datafield="Address" headertext="Address"/>
<asp:boundfield datafield="City" headertext="City"/>
<asp:boundfield datafield="PostalCode" headertext="ZIP Code"/>
</columns>
</asp:gridview>
I have searched and found a few good solutions, however, I do not fully understand them and have been unsuccesful at implementing them. They are:
Edit/Update a single GridView field
Put multiple rows of a gridview into edit mode
So my question is, how would you go about placing a column, (e.g, ZIP Code) into edit mode for all rows at the same time?
All help is appreciated!
Thanks!
Stephen

You won't be able to use the built-in edit functionality, but you can achieve this by loading the column in edit mode using a TemplateField:
<asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView1_RowCommand" ...>
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("SomeColumn") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="SomeOtherColumn" HeaderText="Foo" />
...
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="Button1" runat="server" CommandName="Update" CommandArgument='<%# Container.ItemIndex %>' />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Code-behind:
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridViewRow row = GridView1.Rows[(int)e.CommandArgument];
if (row != null)
{
TextBox txt = row.FindControl("TextBox1") as TextBox;
if (txt != null)
{
//get the value from the textbox
string value = txt.Text;
}
}
}
EDIT: Putting a button outside of the GridView, you would update like this:
<asp:GridView>
...
</asp:GridView>
<asp:Button ID="Button1" runat="server" Text="Update" OnClick="Button1_Click" />
Code-behind:
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView1.Rows)
{
TextBox txt = row.FindControl("TextBox1") as TextBox;
if (txt != null)
{
//get the value from the textbox
string value = txt.Text;
}
}
}

gridview commandargument on buttonfield pagination used

I am using c#.net
I have a gridview which needs to contain a 'Use' button (appointmentId set as the commandargument).
Source Code
<asp:GridView ID="resultsReturned" runat="server" AllowPaging="True"
AutoGenerateColumns="False"
EnableSortingAndPagingCallbacks="True"
OnPageIndexChanged="resultsReturned_PageIndexChanged"
onrowcommand="resultsReturned_RowCommand">
<Columns>
<asp:BoundField DataField="UserAppointmentId" HeaderText="App ID" />
<asp:BoundField DataField="UserBookingName" HeaderText="Booking Name" />
<asp:TemplateField>
<ItemTemplate>
<asp:Button runat="server"
ID="UseButton"
Text="Use"
CommandName="Use"
CommandArgument="UserAppointmentId" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Code-Behind
protected void resultsReturned_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Use")
{
correctAppointmentID.Value = (e.CommandArgument.ToString());
}
}
This is used for the pagination:
private void BindAppointments()
{
var results = appointmentRepos.GetBookingIdBySearchCriteria(catgoryid, resultsReturned.PageIndex * resultsReturned.PageSize, -1);
resultsReturned.DataSource = results;
resultsReturned.DataBind();
}
I am binding the appointments to the gridview within the PageLoad/search_Click
This is the error I am receiving:
Callbacks are not supported on TemplateField because some controls cannot update properly in a callback. Turn callbacks off on 'resultsReturned'.

Try the following:
<asp:Button runat="server"
ID="UseButton" Text="Use" CommandName="Use"
CommandArgument='<%# DataBinder.Eval(Container,"DataItem.UserAppointmentId") %>' />
and Set EnableSortingAndPagingCallbacks="False"