My gridview is bound to List when users click a refresh button as follows:
grv_xyz.DataSource = lstVendorInfo;
grv_zyz.DataBind();
I put a <asp:CommandField HeaderText="Delete" ShowDeleteButton="True" ShowHeader="True" /> before all other TemplateFields to display data like
<Columns>
<asp:CommandField HeaderText="Delete" ShowDeleteButton="True" ShowHeader="True" />
<asp:TemplateField HeaderText="Vendor ID">
<ItemStyle Width="10%" BorderColor="#efefef" BorderWidth="1px"/>
<ItemTemplate>
<asp:HyperLink NavigateUrl="#" ID="abcID" runat="server" Text='<%# Bind("abc") %>'></asp:HyperLink>
</ItemTemplate>
<HeaderStyle BorderColor="#efefef" />
</asp:TemplateField>
</Columns>
The problem is cell. Text property in the following is "".
protected void grv_Vendor_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
ShowResult();
TableCell cell = grv_Vendor.Rows[e.RowIndex].Cells[4];
}
How could I retieve the value inside a TemplateField in RowDeleting event?
Thanks a lot.
A TemplateField includes controls, so the value should be accessed through them. For example, if you have a label inside a TemplateField and you want to access its value, you would write:
Label yourLabel = e.Item.FindControl("YourLabelID") as Label;
string val = yourLabel.Text;
Related
So here I'm trying to get the Textbox filled with the selected data from the DataGridView, so when I clicked the button in the DataGridView, the selected result will be put into the Textbox, I've tried the solution from other resource but still no luck. Can somebody help? Here's the DataGridView code:
DataGridView:
<asp:Panel ID="PanelDGV" runat="server" ScrollBars="None" Height="250" Width="515">
<asp:GridView ID="DGV" runat="server" AutoGenerateColumns="False" GridLines="None" AllowPaging="true" PageSize="8" CssClass="mGrid" PagerStyle-CssClass="pgr" AlternatingRowStyle-CssClass="alt">
<Columns>
<asp:BoundField DataField="ProjectCode" HeaderText="Project Code" />
<asp:BoundField DataField="ProjectName" HeaderText="Project Name" />
<asp:ButtonField ButtonType="Image" ImageUrl="../Support/Image/Edit.png" ItemStyle-HorizontalAlign="Center" CommandName="CmdSearch" HeaderText="Edit">
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:ButtonField>
</Columns>
<PagerStyle CssClass="pgr"></PagerStyle>
AlternatingRowStyle CssClass="alt"></AlternatingRowStyle>
</asp:GridView>
</asp:Panel>
notice the button is:
<asp:ButtonField ButtonType="Image" ImageUrl="../Support/Image/Edit.png" ItemStyle-HorizontalAlign="Center" CommandName="CmdSearch" HeaderText="Edit">
oh, and the textbox's ID is "TbProjectCode", and both are in separate pages, say that 1.aspx contain the textbox and a button to open the datagridview and 2.aspx contain the datagridview and the button to select the Project Code.
thank you
Add OnRowCommand event on your gridview: OnRowCommand="DGV_OnRowCommand".
Then add this on your code behind:
protected void DGV_OnRowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "CmdSearch")
{
int index = (int)e.CommandArgument;
GridViewRow row = DGV.Rows[index];
// Get the text on first cell of the row which is the project code.
TbProjectCode.Text = row.Cells[0].Text;
}
}
I would like to set a templatefield (linkbutton) to invisible when the DetailsView is not in ReadOnly mode. I created a linkbutton to replace the auto-gen "delete" button and want to hide it when editing and inserting.
<asp:DetailsView ID="resultDetailsView" runat="server" AutoGenerateRows="False" DataKeyNames="smo_code,id"
DataSourceID="detailviewDataSource" Height="50px" Width="125px" OnItemInserting="resultDetailsView_ItemInserting"
OnItemUpdating="resultDetailsView_ItemUpdating" OnItemUpdated="resultDetailsView_ItemUpdated"
OnItemDeleted="resultDetailsView_ItemDeleted" OnItemInserted="resultDetailsView_ItemInserted"
OnItemDeleting="resultDetailsView_ItemDeleting" OnModeChanging="resultDetailsView_ModeChanging"
OnDataBound="resultDetailsView_DataBound" OnItemCommand="resultDetailsView_ItemCommand">
<Fields>
<asp:BoundField DataField="event" HeaderText="event" SortExpression="event" />
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="deleteLink" runat="server" CommandName="Delete" Text="Delete"
OnClientClick='return confirm("Are you sure you want to delete this item?");' />
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="False" ShowEditButton="True" ShowInsertButton="True" />
</Fields>
</asp:DetailsView>
IN CODE BEHIND, FINDCONTROL returned null:
protected void resultDetailsView_DataBound(object sender, EventArgs e)
{
LinkButton deleteLink = (LinkButton)resultDetailsView.FindControl("deleteLink");
if (resultDetailsView.CurrentMode == DetailsViewMode.ReadOnly)
{
deleteLink.Visible = true;
}
else
{
deleteLink.Visible = false;
}
}
You can do it after .DataBind() method. Here is a good example
How to dynamically hide fields in a DetailsView (fields count is always 0)
Or even this too is a good example
Listview/DetailsView: Hide a null field
i'm new to asp.net. i'm doing one project. in that i've used one gridview and fetch datas from database using sqldatasource.
gridview code is
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="Library" CellPadding="4" ForeColor="#333333"
GridLines="None" OnRowDataBound="GridView1_RowDataBound" >
<RowStyle BackColor="#EFF3FB" />
<Columns>
<asp:BoundField DataField="Sl_No" HeaderText="Sl_No" SortExpression="Sl_No" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="Author" HeaderText="Author"
SortExpression="Author" />
<asp:BoundField DataField="Publication" HeaderText="Publication"
SortExpression="Publication" />
<asp:BoundField DataField="Available" HeaderText="Status"
SortExpression="Available" />
<asp:TemplateField HeaderText="Availability">
<ItemTemplate>
<asp:Image ID="Image1" runat="server" ImageUrl='<%# Eval("Available") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="RIUserTaken" HeaderText="RIUserTaken"
SortExpression="RIUserTaken" Visible="False" />
<asp:TemplateField HeaderText="Taken By" ShowHeader="False">
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("RIUserTaken", "{0}") %>'></asp:Label>
<asp:Button ID="SendRequest" runat="server" Text="Button" Visible="False"
onclick="SendRequest_Click" CommandName="SendRequestCmd" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Taken Date" InsertVisible="False"
ShowHeader="False">
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Eval("TakenDate") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<EditRowStyle BackColor="#2461BF" />
<AlternatingRowStyle BackColor="White" /> </asp:GridView>
code is one of the column of the grid view. if i click on that button, i've to store that button contains rows all datas in string variable. like
string slno="";
slno=gridview1.cells[0].text; (i'm not sure it is correct or not)
plz anyone help me??
thanks in advance :)
From msdn, you should check this.
GridView.SelectedIndexChanged event
void CustomersGridView_SelectedIndexChanged(Object sender, EventArgs e)
{
// Get the currently selected row using the SelectedRow property.
GridViewRow row = CustomersGridView.SelectedRow;
// Display the company name from the selected row.
// In this example, the third column (index 2) contains
// the company name.
MessageLabel.Text = "You selected " + row.Cells[2].Text + ".";
}
void CustomersGridView_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e)
{
// Get the currently selected row. Because the SelectedIndexChanging event
// occurs before the select operation in the GridView control, the
// SelectedRow property cannot be used. Instead, use the Rows collection
// and the NewSelectedIndex property of the e argument passed to this
// event handler.
GridViewRow row = CustomersGridView.Rows[e.NewSelectedIndex];
// You can cancel the select operation by using the Cancel
// property. For this example, if the user selects a customer with
// the ID "ANATR", the select operation is canceled and an error message
// is displayed.
if (row.Cells[1].Text == "ANATR")
{
e.Cancel = true;
MessageLabel.Text = "You cannot select " + row.Cells[2].Text + ".";
}
}
Do these things
Step 1. Wire up a RowCommand Evnt to your GridView
Step 2. Inside that event at code-behind, do this
if(e.CommandName.Equals("SendRequestCmd"))
{
var clickedRow = ((Button)e.CommandSource).NamingContainer as GridViewRow;
// now access the cells like this
var clickedSLNo = clickedRow.cells[0].Text;
}
Update:
e.CommandSource definition
A instance of the System.Object class that represents the source of the command.
IButtonControl.CommandArgument definition
A control that implements the IButtonControl interface must implement the CommandArgument property and the CommandName property to indicate the argument and command name that are propagated to the Command event.
Q> I want to show a GridView button's text as hard coded and a event to fire on button click. How to achieve this ?
Till now I've been able to come this far
But I want to show button text as Read or Delete not the value in the Read/Delete column.
The code I've used
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataKeyNames="MID" DataSourceID="inbox" EnableModelValidation="True"
onselectedindexchanged="GridView1_SelectedIndexChanged">
<Columns>
<asp:ButtonField ButtonType="Button" DataTextField="MID" HeaderText="Read"
Text="Read" />
<asp:BoundField DataField="MID" HeaderText="MID" InsertVisible="False"
ReadOnly="True" SortExpression="MID" />
<asp:BoundField DataField="sender" HeaderText="sender"
SortExpression="sender" />
<asp:BoundField DataField="subject" HeaderText="subject"
SortExpression="subject" />
<asp:BoundField DataField="on" HeaderText="on" SortExpression="on" />
<asp:ButtonField ButtonType="Button" DataTextField="MID" HeaderText="Delete"
Text="Delete" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="inbox" runat="server"
ConnectionString="<%$ ConnectionStrings:connectionString %>"
SelectCommand="SELECT [MID], [sender], [subject], [on] FROM [mail]">
</asp:SqlDataSource>
If you want the text to appear as "Delete" or "Read", then simply don't set the DataTextField property to use the MID property of the result and instead set the CommandName property as so:
<asp:ButtonField ButtonType="Button" CommandName='<%#Eval("MMID")%>' HeaderText="Delete"
Text="Delete" />
As far as handling the OnClick event of the buttons, you can handle the OnRowCommand event on the GridView as so:
<asp:GridView ID="GridView1" runat="server" OnRowCommand="GridView_RowCommand" AutoGenerateColumns="False"
Now add the code behind:
protected void GridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
string MMID = e.CommandName;
if( (e.CommandSource as ButtonField).Text=="Delete")
{
//oh, I should delete this MMID
}
}
UPDATE
Above code does not work. ButtonField is as useful as nipples are to men. Instead use an ItemTemplateField as so:
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="btn" runat="server" CommandName="Delete" CommandArgument='<%#Eval("MID") %>'
Text="Delete" />
</ItemTemplate>
</asp:TemplateField>
Then the GridView_RowCommand becomes this:
protected void GridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
string mid = e.CommandArgument.ToString();
// If multiple buttons are used in a GridView control, use the
// CommandName property to determine which button was clicked.
if (e.CommandName == "Delete")
{
}
}
i have a checkbox in a template field of a gridview and i want to get the id of the record at a checkbox tick. how do i do it? i am doing asp.net and also by using datakeynames instead, my gridview also shows the datakeynames persID column. why?
my code:
<asp:GridView ID="GridViewHostelMember" runat="server" DataKeyNames="_PersID" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="_PersID" HeaderText="_PersID" />
<asp:BoundField DataField="FirstName" HeaderText="First Name" />
<asp:BoundField DataField="LastName" HeaderText="LastName" />
<asp:BoundField DataField="DOB" HeaderText="DOB" />
<asp:BoundField DataField="FatherName" HeaderText="FatherName" />
<asp:BoundField DataField="Type" HeaderText="Type" />
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CheckBoxSelect" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow item in this.GridViewHostelMember.Rows)
{
CheckBox chbTemp = item.FindControl("CheckBoxSelect") as CheckBox;
if (chbTemp != null)
{
if (chbTemp.Checked)
{
Label1.Text = item.Cells[0].Text;
}
}
}
}
_PersID is showing because autogeneratecolumns is set to true; if true, it shows all columns. To hide, set to false, and explicitly add the columns to the grid.
For the first part, at checkbox tick, you would need to set AutoPostBack="true" on the checkbox, which posts back, and then you can check the data key for the current row of the grid.
Reference -
my gridview also shows the datakeynames persID column. why?
true to automatically create bound fields for each field in the data
source; otherwise, false. The default is true.
It should be like below..
<asp:GridView ID="GridViewHostelMember" autogeneratecolumns="False"
runat="server" DataKeyNames="_PersID">
i want to get the id of the record at a checkbox tick. how do i do it?
Sample Code
protected void CheckBox_Checked(object sender, EventArgs e)
{
CheckBox c = (CheckBox)sender;
//c.ValidationGroup is your ID
}
Sample HTML
<asp:GridView ID="ed" runat="server" OnRowCommand="GridView_RowCommand">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chk" runat="server" AutoPostBack="true" ValidationGroup='<%#Eval("ID") %>' OnCheckedChanged="CheckBox_Checked" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>