I use a Checkbox in a Repeater, how can I know which
Checkbox have changed in OnCheckedChanged?
I have tried to set id then checkbox is binding data, but
it will not work. Hope someone can help me
Thanks
/Mats
Check the sender(Event Target) parameter
protected void Chb_Changed(object sender, EventArgs e)
{
if (sender != null)
{
CheckBox cb=(CheckBox)sender;
string clickedCheckBoxID=cb.ID;
}
}
Try following . Please note that we can also bind some primary column let's say "ID" column in some hidden field then get in code behind.
ASPX Side
<asp:Repeater ID="Repeater1" runat="server" DataSourceID="sqldtasource" >
<ItemTemplate>
<asp:CheckBox ID="chk" runat="server" AutoPostBack="true" Text='<%#Bind("Name")%>' OnCheckedChanged="Chb_Changed"/>
<asp:HiddenField ID="hdn_ID" runat="server" Value='<%# DataBinder.Eval(Container.DataItem, "ID") %>'/>
</ItemTemplate>
</asp:Repeater>
Code Behind :
protected void Chb_Changed(object sender, EventArgs e)
{
if (sender != null)
{
try
{
var hdnID = (HiddenField)checkBox.NamingContainer .FindControl("hf_ID");
if(hdnID != null)
{
string primaryFieldValue = hdnID.Value;
}
if (((CheckBox)sender).Checked)
{
Response.Write(((CheckBox)sender).Text + " is checked");
}
}
catch {
}
}
}
Related
On a RadGrid I can use the CommandItemTemplate to define my own buttons for, in my case, Save and Cancel the edit (like below)
<CommandItemTemplate>
<div style="padding: 5px 5px;">
<asp:LinkButton ID="btnUpdateEdited" runat="server" CommandName="UpdateEdited">Update</asp:LinkButton>
<asp:LinkButton ID="btnCancel" runat="server" CommandName="CancelAll">Cancel editing</asp:LinkButton>
</div>
</CommandItemTemplate>
On the code behind, I set up the ItemCommand.
> protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
{
if (e.CommandName.CompareTo("UpdateEdited") == 0)
{
var commandItem = ((GridCommandItem)e.Item);
//Updade code here.
}
}
How can I access the modified row with the modified fields so I can perform an updade?
You should have them in command item and you can access them like this:
GridDataItem item = (GridDataItem)e.Item;
string value = item["ColumnUniqueName"].Text;
Is this what you want ? Just a sample you might need to modify it..
.aspx
<telerik:RadGrid ID="rg" runat="server" AutoGenerateColumns="false"
OnNeedDataSource="rg_NeedDataSource" OnItemCommand="rg_ItemCommand"
MasterTableView-CommandItemDisplay="Top" OnItemDataBound="rg_ItemDataBound">
<MasterTableView EditMode="InPlace">
<CommandItemTemplate>
<div style="padding: 5px 5px;">
<asp:LinkButton ID="btnUpdateEdited" runat="server"
CommandName="UpdateEdited">Update</asp:LinkButton>
<asp:LinkButton ID="btnCancel" runat="server"
CommandName="CancelAll">Cancel editing</asp:LinkButton>
</div>
</CommandItemTemplate>
<Columns>
<telerik:GridTemplateColumn>
<ItemTemplate>
<asp:Label ID="lbl" runat="server"
Text='<%# Eval("A") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txt" runat="server"
Text='<%# Eval("A") %>'></asp:TextBox>
</EditItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn>
<ItemTemplate>
<asp:LinkButton ID="btnEdit" runat="server" Text="Edit"
CommandName="Edit"></asp:LinkButton>
</ItemTemplate>
<EditItemTemplate> </EditItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
</telerik:RadGrid>
.cs
protected void Page_Load(object sender, EventArgs e)
{
// Check
if (!IsPostBack)
{
// Variable
DataTable dt = new DataTable();
dt.Columns.Add("A");
dt.Rows.Add("A1");
// Check & Bind
if (dt != null)
{
// Viewstate
ViewState["Data"] = dt;
rg.DataSource = dt;
rg.DataBind();
dt.Dispose();
}
}
}
protected void rg_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
rg.DataSource = ViewState["Data"] as DataTable;
}
protected void rg_ItemCommand(object sender, GridCommandEventArgs e)
{
// Check
if (e.CommandName == "UpdateEdited")
{
// Variable
DataTable dt = new DataTable();
dt.Columns.Add("A");
// Loop All
foreach (GridEditableItem item in rg.Items)
{
// Find Control
TextBox txt = item.FindControl("txt") as TextBox;
// Check & Add to DataTable
if (txt != null) dt.Rows.Add(txt.Text.Trim());
}
// Check
if (dt != null && dt.Rows.Count > 0)
{
// Set Viewstate
ViewState["Data"] = dt;
// Bind
rg.DataSource = dt;
rg.DataBind();
// Dispose
dt.Dispose();
}
}
else if (e.CommandName == "CancelAll")
{
// Clear Edit Mode
rg.MasterTableView.ClearChildEditItems();
// Rebind
rg.Rebind();
}
}
protected void rg_ItemDataBound(object sender, GridItemEventArgs e)
{
// Check
if (e.Item is GridCommandItem)
{
// Find Control
LinkButton btnUpdateEdited = e.Item.FindControl("btnUpdateEdited") as LinkButton;
LinkButton btnCancel = e.Item.FindControl("btnCancel") as LinkButton;
// Get is Edit Mode ?
if (rg.EditIndexes.Count > 0)
{
if (btnUpdateEdited != null) btnUpdateEdited.Visible = true;
if (btnCancel != null) btnCancel.Visible = true;
}
else
{
if (btnUpdateEdited != null) btnUpdateEdited.Visible = false;
if (btnCancel != null) btnCancel.Visible = false;
}
}
}
Hi from this field in my gridview, I'd like to pass the id value when the select command field is clicked, but i don't want to have the id field visible so I have the visible property set to false; however, when I pass it on the SelectedIndexChanged event the value is "" yet when the visible property is set to "true" the text value passes fine. What is the correct way to do this?
<asp:BoundField DataField="Project_ID" Visible="false"/>
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
String ProjID = GridView1.SelectedRow.Cells[10].Text;
}
Try this:
.aspx
<asp:Gridview id="GridView1" runat="server" DataKeyNames="Project_ID" />
.cs
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
if(gridView.SelectedDataKey != null)
{
var selectedId = GridView1.SelectedDataKey.Value;
}
}
Here you'll find more info about DataKeys in Gridviews: http://msdn.microsoft.com/de-de/library/system.web.ui.webcontrols.gridview.selecteddatakey(v=vs.110).aspx
I have done something like this in winform maybe can help you. That is what i used
int rowindex = dataGridView1.CurrentRow.Index;
string ProjID= dataGridView1.Rows[rowindex].Cells[10].Value.ToString();
you could use HiddenField inside your gridView ItemTemplate to keep the ID and use it in onrowcommand event, like below:
.aspx
<asp:GridView ID="gridProject" runat="server"
onrowcommand="gridProject_RowCommand">
<Columns>
<ItemTemplate>
<asp:HiddenField ID="hidProjectID" runat="server"
Value='<%# ((DataRowView)Container.DataItem)["Project_ID"] %>' />
<asp:Button ID="btnProject" runat="server" Text="use pro id"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"
CommandName="DoSomething"></asp:Button>
</ItemTemplate>
</Columns>
</asp:GridView>
aspx.cs
protected void gridProject_RowCommand(object sender, GridViewCommandEventArgs e)
{
int index = 0;
GridViewRow gridRow;
GridView grid = sender as GridView;
try
{
switch (e.CommandName)
{
case "DoSomething":
index = Convert.ToInt32(e.CommandArgument);
row= gridProject.Rows[index];
string Id = ((HiddenField)row.FindControl("hidProjectID")).Value;
//do whatever you want here
break;
// and you can have as many commands as you want here
}
}
catch { //display error }
}
I'm trying to Change Text property of hyperlinks inside a listview but Findcontrol returns null although I know it should returns a hyperlink.
Listview:
<asp:ListView ID="ListView2" OnDataBound="ListView2_DataBound" runat="server">
<ItemTemplate>
<asp:HyperLink ID="HyperLinkMenuItem" runat="server" class="btn btn-default" Text='<%#Eval("CatName") %>' NavigateUrl='<%# "City.aspx?City="+ Request.QueryString["City"]+"&CatID="+Eval("CatID") %>'></asp:HyperLink>
</ItemTemplate>
</asp:ListView>
Behind Code:
protected void ListView2_DataBound(object sender, EventArgs e)
{
foreach (ListViewDataItem item in ListView1.Items)
{
HyperLink MenuItem = (HyperLink) item.FindControl("HyperLinkMenuItem");
if (MenuItem.Text == "Something")
{
MenuItem.Text = "";
}
}
}
You need use ItemDataBound event with ListViewItemEventArgs.
<asp:ListView ID="ListView2"
OnItemDataBound="ListView2_ItemDataBound" runat="server">
In addition, you do not need to loop through ListView1 (I have no clue where ListView1 came from)
protected void ListView2_DataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
var menuItem = e.Item.FindControl("HyperLinkMenuItem") as HyperLink;
}
}
I have a list of parameter names for which I want a user to type in some values, so I do this:
<div>
<asp:Repeater runat="server" ID="rptTemplateParams" EnableViewState="true">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label runat="server"><%#Container.DataItem%></asp:Label>
<asp:TextBox runat="server" ID="textParamValue"></asp:TextBox>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</div>
<asp:Button runat="server" ID="Send" Text="Send Email" OnClick="Send_Click" />
and on server side:
void Page_Load(...)
{
rptTemplateParams.DataSource =Params; // Params is List<string>
rptTemplateParams.DataBind();
}
public void Send_Click(object sender, EventArgs e)
{
ParamDict = new Dictionary<string, string>();
foreach (RepeaterItem item in rptTemplateParams.Items)
{
if (item.ItemType == ListItemType.Item)
{
TextBox textParamValue = (TextBox)item.FindControl("textParamValue");
if (textParamValue.Text.Trim() != String.Empty)
{
// IT NEVER GETS HERE - textParamValue.Text IS ALWAYS EMPTY!!!
ParamDict.Add(item.DataItem.ToString(), textParamValue.Text);
}
}
}
}
As I put in the comment, i can't retrieve text box values - they are always empty. Am I retrieving those in the wrong place?
Thanks!
Andrey
Try modifying your page_load like this
if(!Page.IsPostBack)
{
rptTemplateParams.DataSource =Params; // Params is List<string>
rptTemplateParams.DataBind();
}
The databinding wipes out existing controls and replaces them with new blank controls. You only want to databind when necessary.
try this:
void Page_Load(...)
{
if (!IsPostBack)
{
rptTemplateParams.DataSource =Params; // Params is List<string>
rptTemplateParams.DataBind();
}
}
I need to get a value from a textbox inside a FooterTemplate in the OnClick event of a button. My first thought was to loop through the items-property on my repeater, but as you can see in this sample, it only includes the actual databound items, not the footer-item.
ASPX:
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
Item<br />
</ItemTemplate>
<FooterTemplate>
Footer<br />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:Repeater>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
Code-behind.cs:
protected void Page_Load(object sender, EventArgs e)
{
ListItemCollection items = new ListItemCollection();
items.Add("value1");
items.Add("value2");
Repeater1.DataSource = items;
Repeater1.DataBind();
}
protected void Button1_Click(object sender, EventArgs e)
{
System.Diagnostics.Debug.WriteLine(Repeater1.Items.Count);
}
This code will only output "2" as the count, so how do I get to reference my textbox inside the footertemplate?
From the MSDN documentation, the Items is simply a set of RepeaterItems based off the DataSource that you are binding to and does not include items in the Header or FooterTemplates.
If you want to reference the textbox, you can get a reference on ItemDataBound event from the repeater where you can test for the footer.
E.g.
private void Repeater_ItemDataBound(Object Sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Footer)
{
TextBox textBox = e.Item.FindControl("TextBox1") as TextBox;
}
}
You can find controls in the repeater. That will give you all the controls in the repeater (RepeaterItems collection). Now you can do something like this:
RepeaterItem footerItem=null;
foreach(Control cnt in Repeater1.Controls)
{
if(cnt.GetType() == typeof(RepeaterItem) && ((RepeaterItem)cnt).ItemType == ListItemType.Footer)
{
footerItem = cnt;
break;
}
}
The footer should be the last child control of the repeater so you can do something like..
RepeaterItem riFooter = Repeater1.Controls[Repeater1.Controls.Count - 1] as RepeaterItem;
if (riFooter != null && riFooter.ItemType == ListItemType.Footer) {
TextBox TextBox1 = riFooter.FindControl("TextBox1") as TextBox;
if (TextBox1 != null) {
TextBox1.Text = "Test";
}
}