Events in DataList EditItem Template won't fire

C

Crazy Cat

Hi all,

I am developing an asp.net 2.0 application in Visual Studio 2005. On
my page I have a simple datalist that is bound programmatically to a
collection of simple objects. On this page I need to control the
visibility of a textbox based on a dropdown selection in the
datalist's edititem template. To do this, I registered a client script
block function and attached a client side handler for the
dropdownlist's onchange event in the datalist's OnItemCreated event.
The client script works fine, but I find that the update and cancel
events won't fire in the EditItem template. My edit, delete, and add
event fire fine in the ItemTemplate. I also find that if I remove the
client side onchange event handler the EditItem commands work fine.
Here is the code --


protected void Page_Load(object sender, EventArgs e)
{
// Register client script block containing the event handler for the
datalist's dropdownlist control.
ClientScriptManager csm = this.ClientScript;
string script = "function EnableCheckNumberVisibility(Type,
CheckNumber)\n" +
"{ \n" +
"if (Type.value == 'K') { \n" +
"CheckNumber.style.visibility = 'visible'; \n"
+
"} else {\n" +
"CheckNumber.style.visibility = 'hidden';\n" +
"}\n" +
"return true;\n" +
"}";
csm.RegisterClientScriptBlock(this.GetType(),
"EnableCheckNumberVisibility", script,true);
if (!IsPostBack)
{
// Get Custom object collection out of session
Payments = BLL.Payments.getPaymentsByMemberId("XXXXXX");
txtMemberAmount.Text =
Payments.MemberAmount.ToString("c");
txtDependentAmount.Text =
Payments.DependentAmount.ToString("c");
txtLateFee.Text = Payments.LateFee.ToString("c");
txtAdminFee.Text = Payments.AdminFee.ToString("c");
txtTotalDues.Text = Payments.TotalDues.ToString("c");

Payments.PaymentCollection.Add(new BLL.Payment());

PaymentTypes = BLL.Payment.getPaymentTypes();

dlPayments.DataSource = Payments.PaymentCollection;
dlPayments.DataBind();
}
}
protected void dlPayments_ItemCommand(object sender,
DataListCommandEventArgs e)
{
DataList dl = (DataList)sender;

switch (e.CommandName)
{
case "add":
Payments.add(new BLL.Payment());

dlPayments.DataSource = Payments.PaymentCollection;
dlPayments.DataBind();
break;
}

}
protected void dlPayments_ItemDataBound(object sender,
DataListItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) ||
(e.Item.ItemType == ListItemType.SelectedItem) ||
(e.Item.ItemType == ListItemType.AlternatingItem)
)
{
BLL.Payment p = (BLL.Payment)e.Item.DataItem;
foreach (ListItem i in PaymentTypes)
{
if (i.Value == p.TypeCode)
{
Label l =
(Label)e.Item.FindControl("lblPaymentType");
l.Text = i.Text;
break;
}
}
}
}
protected void dlPayments_ItemCreated(object sender,
DataListItemEventArgs e)
{
// hook up the event handler here
if (e.Item.ItemType == ListItemType.EditItem)
{
DropDownList dl =
(DropDownList)e.Item.FindControl("ddlType");

dl.Items.AddRange(PaymentTypes.ToArray());

TextBox tb =
(TextBox)e.Item.FindControl("txtCheckNumber");

dl.Attributes["onchange"] = "EnableCheckNumberVisibility("
+ dl.ClientID + "," +
tb.ClientID + ");";

}
}
protected void dlPayments_DeleteCommand(object source,
DataListCommandEventArgs e)
{
if (e.Item.ItemIndex > 0)
{

Payments.remove(Payments.PaymentCollection[e.Item.ItemIndex]);
((DataList)source).DataSource =
Payments.PaymentCollection;
dlPayments.DataBind();
}

}
protected void dlPayments_EditCommand(object source,
DataListCommandEventArgs e)
{
((DataList)source).EditItemIndex = e.Item.ItemIndex;
((DataList)source).DataSource = Payments.PaymentCollection;
((DataList)source).DataBind();
}
protected void dlPayments_UpdateCommand(object source,
DataListCommandEventArgs e)
{
DataList dl = (DataList)source;

// Payment Type
DropDownList ddlType =
(DropDownList)e.Item.FindControl("ddlType");
Payments.PaymentCollection[e.Item.ItemIndex].TypeCode =
ddlType.SelectedValue;

// Amount
TextBox txtAmount = (TextBox)e.Item.FindControl("txtAmount");
Payments.PaymentCollection[e.Item.ItemIndex].Amount =
Single.Parse(txtAmount.Text);

// Check Number
TextBox txtCheckNumber =
(TextBox)e.Item.FindControl("txtCheckNumber");
Payments.PaymentCollection[e.Item.ItemIndex].CheckNumber =
txtCheckNumber.Text;

dl.DataSource = Payments.PaymentCollection;
dl.EditItemIndex = -1;
dl.DataBind();

}
protected void dlPayments_CancelCommand(object source,
DataListCommandEventArgs e)
{
DataList dl = (DataList)source;

dl.DataSource = Payments.PaymentCollection;
dl.EditItemIndex = -1;
dl.DataBind();
}
 
N

Nathan Sokalski

The first thing I am going to suggest is that you use a
System.Text.StringBuilder to create the JavaScript rather than a bunch of
concatenation operators (it is more efficient and the code is easier to
read). In your EnableCheckNumberVisibility function, what is CheckNumber? If
it is one of the controls, it will not work because the ID used on the
client is not the one you enter server-side (you need to use the ClientId
property to get the generated ID, do a View Source in your browser to see
what I'm talking about). Also, when referencing an element in JavaScript,
you should always use the document.getElementById(elementid) method. Also, I
think it would be helpful to everyone in these newsgroups if you posted the
DataList code in your *.aspx file as well.
--
Nathan Sokalski
(e-mail address removed)
http://www.nathansokalski.com/

Crazy Cat said:
Hi all,

I am developing an asp.net 2.0 application in Visual Studio 2005. On
my page I have a simple datalist that is bound programmatically to a
collection of simple objects. On this page I need to control the
visibility of a textbox based on a dropdown selection in the
datalist's edititem template. To do this, I registered a client script
block function and attached a client side handler for the
dropdownlist's onchange event in the datalist's OnItemCreated event.
The client script works fine, but I find that the update and cancel
events won't fire in the EditItem template. My edit, delete, and add
event fire fine in the ItemTemplate. I also find that if I remove the
client side onchange event handler the EditItem commands work fine.
Here is the code --


protected void Page_Load(object sender, EventArgs e)
{
// Register client script block containing the event handler for the
datalist's dropdownlist control.
ClientScriptManager csm = this.ClientScript;
string script = "function EnableCheckNumberVisibility(Type,
CheckNumber)\n" +
"{ \n" +
"if (Type.value == 'K') { \n" +
"CheckNumber.style.visibility = 'visible'; \n"
+
"} else {\n" +
"CheckNumber.style.visibility = 'hidden';\n" +
"}\n" +
"return true;\n" +
"}";
csm.RegisterClientScriptBlock(this.GetType(),
"EnableCheckNumberVisibility", script,true);
if (!IsPostBack)
{
// Get Custom object collection out of session
Payments = BLL.Payments.getPaymentsByMemberId("XXXXXX");
txtMemberAmount.Text =
Payments.MemberAmount.ToString("c");
txtDependentAmount.Text =
Payments.DependentAmount.ToString("c");
txtLateFee.Text = Payments.LateFee.ToString("c");
txtAdminFee.Text = Payments.AdminFee.ToString("c");
txtTotalDues.Text = Payments.TotalDues.ToString("c");

Payments.PaymentCollection.Add(new BLL.Payment());

PaymentTypes = BLL.Payment.getPaymentTypes();

dlPayments.DataSource = Payments.PaymentCollection;
dlPayments.DataBind();
}
}
protected void dlPayments_ItemCommand(object sender,
DataListCommandEventArgs e)
{
DataList dl = (DataList)sender;

switch (e.CommandName)
{
case "add":
Payments.add(new BLL.Payment());

dlPayments.DataSource = Payments.PaymentCollection;
dlPayments.DataBind();
break;
}

}
protected void dlPayments_ItemDataBound(object sender,
DataListItemEventArgs e)
{
if ((e.Item.ItemType == ListItemType.Item) ||
(e.Item.ItemType == ListItemType.SelectedItem) ||
(e.Item.ItemType == ListItemType.AlternatingItem)
)
{
BLL.Payment p = (BLL.Payment)e.Item.DataItem;
foreach (ListItem i in PaymentTypes)
{
if (i.Value == p.TypeCode)
{
Label l =
(Label)e.Item.FindControl("lblPaymentType");
l.Text = i.Text;
break;
}
}
}
}
protected void dlPayments_ItemCreated(object sender,
DataListItemEventArgs e)
{
// hook up the event handler here
if (e.Item.ItemType == ListItemType.EditItem)
{
DropDownList dl =
(DropDownList)e.Item.FindControl("ddlType");

dl.Items.AddRange(PaymentTypes.ToArray());

TextBox tb =
(TextBox)e.Item.FindControl("txtCheckNumber");

dl.Attributes["onchange"] = "EnableCheckNumberVisibility("
+ dl.ClientID + "," +
tb.ClientID + ");";

}
}
protected void dlPayments_DeleteCommand(object source,
DataListCommandEventArgs e)
{
if (e.Item.ItemIndex > 0)
{

Payments.remove(Payments.PaymentCollection[e.Item.ItemIndex]);
((DataList)source).DataSource =
Payments.PaymentCollection;
dlPayments.DataBind();
}

}
protected void dlPayments_EditCommand(object source,
DataListCommandEventArgs e)
{
((DataList)source).EditItemIndex = e.Item.ItemIndex;
((DataList)source).DataSource = Payments.PaymentCollection;
((DataList)source).DataBind();
}
protected void dlPayments_UpdateCommand(object source,
DataListCommandEventArgs e)
{
DataList dl = (DataList)source;

// Payment Type
DropDownList ddlType =
(DropDownList)e.Item.FindControl("ddlType");
Payments.PaymentCollection[e.Item.ItemIndex].TypeCode =
ddlType.SelectedValue;

// Amount
TextBox txtAmount = (TextBox)e.Item.FindControl("txtAmount");
Payments.PaymentCollection[e.Item.ItemIndex].Amount =
Single.Parse(txtAmount.Text);

// Check Number
TextBox txtCheckNumber =
(TextBox)e.Item.FindControl("txtCheckNumber");
Payments.PaymentCollection[e.Item.ItemIndex].CheckNumber =
txtCheckNumber.Text;

dl.DataSource = Payments.PaymentCollection;
dl.EditItemIndex = -1;
dl.DataBind();

}
protected void dlPayments_CancelCommand(object source,
DataListCommandEventArgs e)
{
DataList dl = (DataList)source;

dl.DataSource = Payments.PaymentCollection;
dl.EditItemIndex = -1;
dl.DataBind();
}
Click to expand...
 
C

Crazy Cat

The first thing I am going to suggest is that you use a
System.Text.StringBuilder to create the JavaScript rather than a bunch of
concatenation operators (it is more efficient and the code is easier to
read).
Click to expand...

Good tip. Thanks.

In your EnableCheckNumberVisibility function, what is CheckNumber? If
it is one of the controls, it will not work because the ID used on the
client is not the one you enter server-side (you need to use the ClientId
property to get the generated ID, do a View Source in your browser to see
what I'm talking about).
Click to expand...

CheckNumber is a textbox control and I am using ClientId (see the
ItemCreated
method where I attach the client side handler).

Also, when referencing an element in JavaScript,
you should always use the document.getElementById(elementid) method.
Click to expand...

Initially, I used the getElementById method, but that actually caused
an error. Apparently the
javascript resolved the object name I passed it into a DOM element,
and when I attempted to
call getElementById with what it saw as an object and not a string, it
threw an exception.

Also, I
think it would be helpful to everyone in these newsgroups if you posted the
DataList code in your *.aspx file as well.
Click to expand...

I'm not at the office now, but I will post the *.aspx file tomorrow.

Thanks for your suggestions.
--
Nathan Sokalski
(e-mail address removed)://www.nathansokalski.com/


Hi all,
Click to expand...
I am developing an asp.net 2.0 application in Visual Studio 2005. On
my page I have a simple datalist that is bound programmatically to a
collection of simple objects. On this page I need to control the
visibility of a textbox based on a dropdown selection in the
datalist's edititem template. To do this, I registered a client script
block function and attached a client side handler for the
dropdownlist's onchange event in the datalist's OnItemCreated event.
The client script works fine, but I find that the update and cancel
events won't fire in the EditItem template. My edit, delete, and add
event fire fine in the ItemTemplate. I also find that if I remove the
client side onchange event handler the EditItem commands work fine.
Here is the code --
Click to expand...
   protected void Page_Load(object sender, EventArgs e)
   {
// Register client script block containing the event handler for the
datalist's dropdownlist control.
       ClientScriptManager csm = this.ClientScript;
       string script = "function EnableCheckNumberVisibility(Type,
CheckNumber)\n" +
                       "{ \n" +
                       "if (Type.value == 'K') { \n" +
                       "CheckNumber.style.visibility = 'visible'; \n"
+
                       "} else {\n" +
                       "CheckNumber.style.visibility = 'hidden';\n" +
                       "}\n" +
                       "return true;\n" +
                       "}";
       csm.RegisterClientScriptBlock(this.GetType(),
"EnableCheckNumberVisibility", script,true);
       if (!IsPostBack)
       {
// Get Custom object collection out of session
           Payments = BLL.Payments.getPaymentsByMemberId("XXXXXX");
           txtMemberAmount.Text =
Payments.MemberAmount.ToString("c");
           txtDependentAmount.Text =
Payments.DependentAmount.ToString("c");
           txtLateFee.Text = Payments.LateFee.ToString("c");
           txtAdminFee.Text = Payments.AdminFee.ToString("c");
           txtTotalDues.Text = Payments.TotalDues.ToString("c");
Click to expand...
           Payments.PaymentCollection.Add(new BLL.Payment());
Click to expand...
           PaymentTypes = BLL.Payment.getPaymentTypes();
Click to expand...
           dlPayments.DataSource = Payments.PaymentCollection;
           dlPayments.DataBind();
       }
   }
   protected void dlPayments_ItemCommand(object sender,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)sender;
Click to expand...
       switch (e.CommandName)
       {
           case "add":
               Payments.add(new BLL.Payment());
Click to expand...
               dlPayments.DataSource = Payments.PaymentCollection;
               dlPayments.DataBind();
               break;
       }
Click to expand...
   }
   protected void dlPayments_ItemDataBound(object sender,
DataListItemEventArgs e)
   {
       if ((e.Item.ItemType == ListItemType.Item) ||
           (e.Item.ItemType == ListItemType.SelectedItem) ||
           (e.Item.ItemType == ListItemType.AlternatingItem)
           )
       {
           BLL.Payment p = (BLL.Payment)e.Item.DataItem;
           foreach (ListItem i in PaymentTypes)
           {
               if (i.Value == p.TypeCode)
               {
                   Label l =
(Label)e.Item.FindControl("lblPaymentType");
                   l.Text = i.Text;
                   break;
               }
           }
       }
   }
   protected void dlPayments_ItemCreated(object sender,
DataListItemEventArgs e)
   {
// hook up the event handler here
       if (e.Item.ItemType == ListItemType.EditItem)
       {
           DropDownList dl =
(DropDownList)e.Item.FindControl("ddlType");
Click to expand...
           dl.Items.AddRange(PaymentTypes.ToArray());
Click to expand...
           TextBox tb =
(TextBox)e.Item.FindControl("txtCheckNumber");
Click to expand...
           dl.Attributes["onchange"] = "EnableCheckNumberVisibility("
                                       + dl.ClientID + "," +
tb.ClientID + ");";
Click to expand...
       }
   }
   protected void dlPayments_DeleteCommand(object source,
DataListCommandEventArgs e)
   {
       if (e.Item.ItemIndex > 0)
       {
Click to expand...
Payments.remove(Payments.PaymentCollection[e.Item.ItemIndex]);
           ((DataList)source).DataSource =
Payments.PaymentCollection;
           dlPayments.DataBind();
       }
Click to expand...
   }
   protected void dlPayments_EditCommand(object source,
DataListCommandEventArgs e)
   {
       ((DataList)source).EditItemIndex = e.Item.ItemIndex;
       ((DataList)source).DataSource = Payments.PaymentCollection;
       ((DataList)source).DataBind();
   }
   protected void dlPayments_UpdateCommand(object source,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)source;
Click to expand...
       // Payment Type
       DropDownList ddlType =
(DropDownList)e.Item.FindControl("ddlType");
       Payments.PaymentCollection[e.Item.ItemIndex].TypeCode =
ddlType.SelectedValue;
Click to expand...
       // Amount
       TextBox txtAmount = (TextBox)e.Item.FindControl("txtAmount");
       Payments.PaymentCollection[e.Item.ItemIndex].Amount =
Single.Parse(txtAmount.Text);
Click to expand...
       // Check Number
       TextBox txtCheckNumber =
(TextBox)e.Item.FindControl("txtCheckNumber");
       Payments.PaymentCollection[e.Item.ItemIndex].CheckNumber =
txtCheckNumber.Text;
Click to expand...
       dl.DataSource = Payments.PaymentCollection;
       dl.EditItemIndex = -1;
       dl.DataBind();
Click to expand...
   }
   protected void dlPayments_CancelCommand(object source,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)source;
Click to expand...
       dl.DataSource = Payments.PaymentCollection;
       dl.EditItemIndex = -1;
       dl.DataBind();
   }
Click to expand...
Click to expand...
 
C

Crazy Cat

HI all,

I have additional info -- here is the markup for my datalist --

<asp:DataList ID="dlPayments"
runat="server"

OnCancelCommand="dlPayments_CancelCommand"

OnUpdateCommand="dlPayments_UpdateCommand"
OnEditCommand="dlPayments_EditCommand"

OnDeleteCommand="dlPayments_DeleteCommand"

OnItemDataBound="dlPayments_ItemDataBound"

OnItemCreated="dlPayments_ItemCreated"

OnItemCommand="dlPayments_ItemCommand" >
<HeaderTemplate>
<table width="410px" border="1"
cellpadding="2" cellspacing="2" class="tblCss" style="border-
color:#0066CC">
<thead>
<tr>
<th class="tblRowMainCss"
style="width: 20%;">
Payment Type
</th>
<th class="tblRowMainCss"
style="width: 20%;">
Amount
</th>
<th class="tblRowMainCss"
style="width: *;">
Check Number <br />
(If Applicable)
</th>
</tr>
</thead>
</HeaderTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
<ItemTemplate>
<tr>
<td class="tblRowMainCss">
<asp:Label ID="lblPaymentType"
runat="server" Text='<%# Eval("TypeCode") %>'></asp:Label>
</td>
<td class="tblRowMainCss">
<asp:Label ID="lblAmount"
runat="server" Text='<%# String.Format("{0:C}",Eval("Amount")) %>'></
asp:Label>
</td>
<td class="tblRowMainCss">
<asp:Label ID="lblCheckNumber"
runat="server" Text='<%# Eval("CheckNumber") %>'></asp:Label>
</td>
<td class="tblRowMainCss">
<asp:LinkButton ID="lbSelect"
runat="server"
Text="Edit"
CommandName="edit">
</asp:LinkButton>
<asp:LinkButton ID="LinkButton1"
runat="server"
Text="Add"
CommandName="add">
</asp:LinkButton>
<asp:LinkButton ID="LinkButton2"
runat="server"
Text="Delete"
CommandName="Delete">
</asp:LinkButton>
</td>
</tr>
</ItemTemplate>
<EditItemTemplate>
<tr>
<td class="tblRowMainCss">
<asp:DropDownList ID="ddlType"
DataValueField='<%#
Eval("TypeCode") %>'
runat="server">
</asp:DropDownList>
</td>
<td class="tblRowMainCss">
<asp:TextBox ID="txtAmount"
runat="server" Text='<%# Eval("Amount") %>'></asp:TextBox>
</td>
<td class="tblRowMainCss">
<asp:TextBox ID="txtCheckNumber"
runat="server" Text='<%# Eval("CheckNumber") %>'></asp:TextBox>
</td>
<td>
<asp:LinkButton ID="LinkButton2"
runat="server"
Text="Save Changes"
CommandName="update">
</asp:LinkButton>
<asp:LinkButton ID="LinkButton3"
runat="server"
Text="Cancel"
CommandName="cancel">
</asp:LinkButton>
</td>
</tr>
</EditItemTemplate>
</asp:DataList>


The first thing I am going to suggest is that you use a
System.Text.StringBuilder to create the JavaScript rather than a bunch of
concatenation operators (it is more efficient and the code is easier to
read).
Click to expand...

Good tip. Thanks.

 In your EnableCheckNumberVisibility function, what is CheckNumber? If
it is one of the controls, it will not work because the ID used on the
client is not the one you enter server-side (you need to use the ClientId
property to get the generated ID, do a View Source in your browser to see
what I'm talking about).
Click to expand...

CheckNumber is a textbox control and I am using ClientId (see the
ItemCreated
method where I attach the client side handler).

Also, when referencing an element in JavaScript,
you should always use the document.getElementById(elementid) method.
Click to expand...

Initially, I used the getElementById method, but that actually caused
an error. Apparently the
javascript resolved the object name I passed it into a DOM element,
and when I attempted to
call getElementById with what it saw as an object and not a string, it
threw an exception.

Also, I
think it would be helpful to everyone in these newsgroups if you posted the
DataList code in your *.aspx file as well.
Click to expand...

I'm not at the office now, but I will post the *.aspx file tomorrow.

Thanks for your suggestions.


news:bb03db6b-58d5-4c33-86ee-7ac577da7ae2@d45g2000hsc.googlegroups.com....
Click to expand...
Hi all,
I am developing an asp.net 2.0 application in Visual Studio 2005. On
my page I have a simple datalist that is bound programmatically to a
collection of simple objects. On this page I need to control the
visibility of a textbox based on a dropdown selection in the
datalist's edititem template. To do this, I registered a client script
block function and attached a client side handler for the
dropdownlist's onchange event in the datalist's OnItemCreated event.
The client script works fine, but I find that the update and cancel
events won't fire in the EditItem template. My edit, delete, and add
event fire fine in the ItemTemplate. I also find that if I remove the
client side onchange event handler the EditItem commands work fine.
Here is the code --
   protected void Page_Load(object sender, EventArgs e)
   {
// Register client script block containing the event handler for the
datalist's dropdownlist control.
       ClientScriptManager csm = this.ClientScript;
       string script = "function EnableCheckNumberVisibility(Type,
CheckNumber)\n" +
                       "{ \n" +
                       "if (Type.value == 'K') { \n" +
                       "CheckNumber.style.visibility = 'visible'; \n"
+
                       "} else {\n" +
                       "CheckNumber.style.visibility = 'hidden';\n" +
                       "}\n" +
                       "return true;\n" +
                       "}";
       csm.RegisterClientScriptBlock(this.GetType(),
"EnableCheckNumberVisibility", script,true);
       if (!IsPostBack)
       {
// Get Custom object collection out of session
           Payments = BLL.Payments.getPaymentsByMemberId("XXXXXX");
           txtMemberAmount.Text =
Payments.MemberAmount.ToString("c");
           txtDependentAmount.Text =
Payments.DependentAmount.ToString("c");
           txtLateFee.Text = Payments.LateFee.ToString("c");
           txtAdminFee.Text = Payments.AdminFee.ToString("c");
           txtTotalDues.Text = Payments.TotalDues.ToString("c");
           Payments.PaymentCollection.Add(new BLL.Payment());
           PaymentTypes = BLL.Payment.getPaymentTypes();
           dlPayments.DataSource = Payments.PaymentCollection;
           dlPayments.DataBind();
       }
   }
   protected void dlPayments_ItemCommand(object sender,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)sender;
       switch (e.CommandName)
       {
           case "add":
               Payments.add(new BLL.Payment());
               dlPayments.DataSource = Payments.PaymentCollection;
               dlPayments.DataBind();
               break;
       }
   }
   protected void dlPayments_ItemDataBound(object sender,
DataListItemEventArgs e)
   {
       if ((e.Item.ItemType == ListItemType.Item) ||
           (e.Item.ItemType == ListItemType.SelectedItem) ||
           (e.Item.ItemType == ListItemType.AlternatingItem)
           )
       {
           BLL.Payment p = (BLL.Payment)e.Item.DataItem;
           foreach (ListItem i in PaymentTypes)
           {
               if (i.Value == p.TypeCode)
               {
                   Label l =
(Label)e.Item.FindControl("lblPaymentType");
                   l.Text = i.Text;
                   break;
               }
           }
       }
   }
   protected void dlPayments_ItemCreated(object sender,
DataListItemEventArgs e)
   {
// hook up the event handler here
       if (e.Item.ItemType == ListItemType.EditItem)
       {
           DropDownList dl =
(DropDownList)e.Item.FindControl("ddlType");
           dl.Items.AddRange(PaymentTypes.ToArray());
           TextBox tb =
(TextBox)e.Item.FindControl("txtCheckNumber");
           dl.Attributes["onchange"] = "EnableCheckNumberVisibility("
                                       + dl.ClientID + "," +
tb.ClientID + ");";
       }
   }
   protected void dlPayments_DeleteCommand(object source,
DataListCommandEventArgs e)
   {
       if (e.Item.ItemIndex > 0)
       {
Payments.remove(Payments.PaymentCollection[e.Item.ItemIndex]);
           ((DataList)source).DataSource =
Payments.PaymentCollection;
           dlPayments.DataBind();
       }
   }
   protected void dlPayments_EditCommand(object source,
DataListCommandEventArgs e)
   {
       ((DataList)source).EditItemIndex = e.Item.ItemIndex;
       ((DataList)source).DataSource = Payments.PaymentCollection;
       ((DataList)source).DataBind();
   }
   protected void dlPayments_UpdateCommand(object source,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)source;
       // Payment Type
       DropDownList ddlType =
(DropDownList)e.Item.FindControl("ddlType");
       Payments.PaymentCollection[e.Item.ItemIndex].TypeCode =
ddlType.SelectedValue;
       // Amount
       TextBox txtAmount = (TextBox)e.Item.FindControl("txtAmount");
       Payments.PaymentCollection[e.Item.ItemIndex].Amount =
Single.Parse(txtAmount.Text);
       // Check Number
       TextBox txtCheckNumber =
(TextBox)e.Item.FindControl("txtCheckNumber");
       Payments.PaymentCollection[e.Item.ItemIndex].CheckNumber =
txtCheckNumber.Text;
       dl.DataSource = Payments.PaymentCollection;
       dl.EditItemIndex = -1;
       dl.DataBind();
   }
   protected void dlPayments_CancelCommand(object source,
DataListCommandEventArgs e)
   {
       DataList dl = (DataList)source;
       dl.DataSource = Payments.PaymentCollection;
       dl.EditItemIndex = -1;
       dl.DataBind();
   }- Hide quoted text -
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