How to implement all Inserts, Updates, Delete operations at once in bulk in ASP:ListView
Question
I have an Asp:ListView control which I am showing in a pop up in a web form. Currently, it does all the changes directly in database as soon as I click the Insert, Update or Delete LinkButtons.
But I need all the changes to be done in database only when Web Form is submitted.
So, what I figured was I would need to keep the data which I am binding to ListView in a session, and on all inserts, updates and delete operations, do all the changes manually on OnInserting, OnDeleting, OnUpdating events by
Step 1) retrieving data every time from Session["ListView1"],
Step 2) doing the Insert/Delete/Update operation on retrieved data
Step 3) binding it to ListView
Step 4) replacing data in Session["ListView1"] after update.
Step 5) On web form submit, taking the updated data and Replace All in database?
I did these steps but it is not working as expected. On Update, ListView displays blank values for 2 columns and binds data incorrectly. I have binded with the right columns. After Insert, TextBox doesn't get changed to Labels as expected. Below is my ListView and code-behind code:
ListView:
<asp:updatepanel id="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:ListView ID="ListView1" runat="server"
OnItemCanceling="ListView1_ItemCanceling" OnItemEditing="ListView1_ItemEditing"
OnItemDeleting="ListView1_ItemDeleting" OnItemUpdating="ListView1_ItemUpdating"
OnItemInserting="ListView1_ItemInserting" DataKeyNames="Id"
InsertItemPosition="LastItem">
<AlternatingItemTemplate>
<tr style="">
<td width="200">
<asp:LinkButton ClientIDMode="AutoID" ID="DeleteButton" runat="server"
CommandName="Delete" Text="Delete" CausesValidation="false" />
<asp:LinkButton ClientIDMode="AutoID" ID="EditButton" runat="server"
CommandName="Edit" Text="Edit" CausesValidation="false" />
</td>
<td>
<asp:Label ID="IdLabel" runat="server" Text='<%# Eval("Id") %>' />
</td>
<td>
<asp:Label ID="FirstNameLabel" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="LastNameLabel" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="Column3Label" runat="server" Text='<%# Eval("Column3") %>' />
</td>
<td>
<asp:Label ID="Column4Label" runat="server" Text='<%# Eval("Column4") %>' />
</td>
</tr>
</AlternatingItemTemplate>
<EditItemTemplate>
<tr style="">
<td>
<asp:LinkButton ClientIDMode="AutoID" ID="UpdateButton" runat="server"
CommandName="Update" Text="Update" ValidationGroup="popup1" CausesValidation="true" />
<asp:LinkButton ClientIDMode="AutoID" ID="CancelButton" runat="server"
CommandName="Cancel" Text="Cancel" CausesValidation="false" />
</td>
<td>
<asp:Label ID="IdLabel1" runat="server" Text='<%# Eval("Id") %>' />
</td>
<td>
<asp:TextBox ID="FirstNameTextBox" Style="width: 100px; background-color: white;"
runat="server" Text='<%# Bind("FirstName") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="NameReq" runat="server" ControlToValidate="FirstNameTextBox"
ErrorMessage="First name is required." ToolTip="First name is required."
ValidationGroup="popup1">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="LastNameTextBox" Style="width: 100px; background-color: white;"
runat="server" Text='<%# Bind("LastName") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"
ControlToValidate="LastNameTextBox" ErrorMessage="Last name is required."
ToolTip="Last name is required." ValidationGroup="popup1">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="Column3TextBox" Style="width: 100px; background-color: white;"
runat="server" Text='<%# Bind("Column3") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server"
ControlToValidate="Column3TextBox" ErrorMessage="ID is required." ToolTip="ID is required."
ValidationGroup="popup1">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="Column4Text" placeholder="mm/dd/yyyy" Style="width: 100px;
background-color: white;" runat="server" Text='<%# Bind("Column4") %>'
CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server"
ControlToValidate="Column4Text" ErrorMessage="Date is required."
ToolTip="Date is required." ValidationGroup="popup1">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:RegularExpressionValidator ID="dateValRegex" runat="server"
ControlToValidate="Column4Text" ErrorMessage="Please Enter a valid date in the format (mm/dd/yyyy)"
ValidationExpression="^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$"
ValidationGroup="popup"></asp:RegularExpressionValidator>
</td>
</tr>
</EditItemTemplate>
<EmptyDataTemplate>
<table id="Table1" runat="server" style="">
<tr>
<td>No data was returned.</td>
</tr>
</table>
</EmptyDataTemplate>
<InsertItemTemplate>
<tr>
<td width="200">
<asp:LinkButton ClientIDMode="AutoID" ID="InsertButton" runat="server" CommandName="Insert"
Text="Insert" ValidationGroup="popup" CausesValidation="true" />
<asp:LinkButton ClientIDMode="AutoID" ID="LinkButton1" runat="server" CommandName="Cancel"
Text="Clear" CausesValidation="false" />
</td>
<td>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Id") %>' />
</td>
<td>
<asp:TextBox ID="TextBox1" Style="width: 100px; background-color: white;" runat="server"
Text='<%# Bind("FirstName") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="FirstNameTextBox" ErrorMessage="First name is required."
ToolTip="First name is required." ValidationGroup="popup">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="TextBox2" Style="width: 100px; background-color: white;" runat="server"
Text='<%# Bind("LastName") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
ControlToValidate="LastNameTextBox" ErrorMessage="Last name is required."
ToolTip="Last name is required." ValidationGroup="popup">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="TextBox3" Style="width: 100px; background-color: white;" runat="server"
Text='<%# Bind("Column3") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server"
ControlToValidate="Column3TextBox" ErrorMessage="ID is required."
ToolTip="ID is required." ValidationGroup="popup">*</asp:RequiredFieldValidator>
</td>
<td>
<asp:TextBox ID="TextBox4" placeholder="mm/dd/yyyy" Style="width: 100px;
background-color: white;" runat="server" Text='<%# Bind("Column4") %>' CausesValidation="true" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="Column4Text"
ErrorMessage="Date is required." ToolTip="Date is required."
ValidationGroup="popup">*</asp:RequiredFieldValidator>
</tr>
<tr>
<td>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
ControlToValidate="Column4Text" ErrorMessage="Please Enter a valid date in the format (mm/dd/yyyy)"
ValidationExpression="^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$"
ValidationGroup="popup"></asp:RegularExpressionValidator>
</td>
</tr>
</InsertItemTemplate>
<ItemTemplate>
<tr>
<td width="200">
<asp:LinkButton ClientIDMode="AutoID" ID="LinkButton2" runat="server" CommandName="Delete"
Text="Delete" CausesValidation="false" />
<asp:LinkButton ClientIDMode="AutoID" ID="LinkButton3" runat="server" CommandName="Edit"
Text="Edit" CausesValidation="false" />
</td>
<td>
<asp:Label ID="Label2" runat="server" Text='<%# Eval("Id") %>' />
</td>
<td>
<asp:Label ID="Label3" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="Label5" runat="server" Text='<%# Eval("Column3") %>' />
</td>
<td>
<asp:Label ID="Label6" runat="server" Text='<%# Eval("Column4") %>' />
</td>
</tr>
</ItemTemplate>
<LayoutTemplate>
<table id="Table2" runat="server">
<tr id="Tr1" runat="server">
<td id="Td1" runat="server">
<table id="itemPlaceholderContainer" runat="server" border="0" style="">
<tr id="Tr2" runat="server" style="">
<th id="Th1" runat="server">Action</th>
<th id="Th2" runat="server">Id</th>
<th id="Th3" runat="server">First Name</th>
<th id="Th4" runat="server">Last Name</th>
<th id="Th5" runat="server">Column3 Name</th>
<th id="Th6" runat="server">Column4 Name</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
</table>
<table width="900" align="center" style="text-align: center;">
<tr id="Tr3" runat="server">
<td id="Td2" runat="server" style="">
<asp:DataPager ID="DataPager1" runat="server">
<Fields>
<asp:NextPreviousPagerField ButtonType="Link" ShowFirstPageButton="True"
ShowNextPageButton="False" ShowPreviousPageButton="False" />
<asp:NumericPagerField />
<asp:NextPreviousPagerField ButtonType="Link" ShowLastPageButton="True"
ShowNextPageButton="False" ShowPreviousPageButton="False" />
</Fields>
</asp:DataPager>
</td>
</tr>
</table>
</LayoutTemplate>
<SelectedItemTemplate>
<tr style="">
<td>
<asp:LinkButton ID="LinkButton4" runat="server" CommandName="Delete" Text="Delete"
CausesValidation="false" />
<asp:LinkButton ID="LinkButton5" runat="server" CommandName="Edit" Text="Edit"
CausesValidation="false" />
</td>
<td>
<asp:Label ID="Label7" runat="server" Text='<%# Eval("Id") %>' />
</td>
<td>
<asp:Label ID="Label8" runat="server" Text='<%# Eval("FirstName") %>' />
</td>
<td>
<asp:Label ID="Label9" runat="server" Text='<%# Eval("LastName") %>' />
</td>
<td>
<asp:Label ID="Label10" runat="server" Text='<%# Eval("Column3") %>' />
</td>
<td>
<asp:Label ID="Label11" runat="server" Text='<%# Eval("Column4") %>' />
</td>
</tr>
</SelectedItemTemplate>
</asp:ListView>
</ContentTemplate>
</asp:updatepanel>
Below is Code Behind code:
protected void Page_Load(object sender, EventArgs e)
{
try
{
if (!IsPostBack)
{
LoadListView();
}
}
private void LoadListView()
{
try
{
List lstDetails = Session["ListView1Data"] as List;
ListView1.DataSource = lstDetails;
ListView1.DataBind();
Session["ListView1Data"] = lstDetails ;
}
catch (Exception ex)
{
ExceptionLogger.LogException(ex);
}
}
protected void ListView1_ItemDeleting(object sender, ListViewDeleteEventArgs e)
{
List lstDetails = Session["ListView1Data"] as List;
int id = Convert.ToInt32(e.Values["Id"]);
if (lstDetails.Exists(x => x.Id == id))
{
var tableDetail = lstDetails.Where(x => x.Id == id).FirstOrDefault();
lstDetails.Remove(tableDetail);
hdnListDeleteIds.Value = id + "|";
ListView1.DataSource = lstDetails;
ListView1.DataBind();
ListView1.EditIndex = -1;
}
}
protected void ListView1_ItemUpdating(object sender, ListViewUpdateEventArgs e)
{
List lstDetails = Session["ListView1Data"] as List;
int id = Convert.ToInt32(e.OldValues["Id"]);
if (lstDetails.Exists(x => x.Id == id))
{
var tableDetail = lstDetails.Where(x => x.Id == id).FirstOrDefault();
tableDetail.FirstName = e.NewValues["FirstName"].ToString();
tableDetail.LastName = e.NewValues["LastName"].ToString();
tableDetail.Column3 = e.NewValues["Column3"].ToString();
tableDetail.Column4 = Convert.ToDateTime(e.NewValues["Column4"]);
hdnListUpdateIds.Value = id + "|";
ListView1.DataSource = lstDetails;
ListView1.DataBind();
ListView1.EditIndex = -1;
Session["ListView1Data"] = lstDetails;
}
}
protected void ListView1_ItemInserting(object sender, ListViewInsertEventArgs e)
{
List lstDetails = Session["ListView1Data"] as List;
EntityFrameworkModel.TableDetails tableDetail = new EntityFrameworkModel.TableDetails()
{
FirstName = e.Values["FirstName"].ToString(),
LastName = e.Values["LastName"].ToString(),
Column3 = e.Values["Column3"].ToString(),
Column4 = Convert.ToDateTime(e.Values["Column4"]),
Id = 0
};
lstDetails.Add(tableDetail);
Session["ListView1Data"] = lstDetails;
ListView1.DataSource = lstDetails;
ListView1.DataBind();
ListView1.EditIndex = -1;
}
protected void ListView1_ItemCanceling(object sender, ListViewCancelEventArgs e)
{
List lstDetails = Session["ListView1Data"] as List;
ListView1.DataSource = lstDetails;
ListView1.DataBind();
e.Cancel = true;
ListView1.EditIndex = -1;
}
protected void ListView1_ItemEditing(object sender, ListViewEditEventArgs e)
{
ListView1.EditIndex = e.NewEditIndex;
}
What am I doing wrong? Please help.
Many Thanks
1 answers
solution1
0 2015-07-01 02:58:23
I have modified your code to Insert/Update/Delete data at one shot. Hope it will help you.
While editing you need to bind the data again,
protected void ListView1_ItemEditing(object sender, ListViewEditEventArgs e)
{
ListView1.EditIndex = e.NewEditIndex;
BindData();
}
private void BindData()
{
ListView1.DataSource = Session["ListView1Data"] as List<TableDetails>;
ListView1.DataBind();
}
While deleting the items, you can consider keeping them(only the existing items, not newly added) in a separate session.
protected void ListView1_ItemDeleting(object sender, ListViewDeleteEventArgs e)
{
List<TableDetails> lstDetails = Session["ListView1Data"] as List<TableDetails>;
if (lstDetails.Count >= e.ItemIndex + 1)
{
var tableDetail = lstDetails[e.ItemIndex];
DeletedItems(tableDetail);
lstDetails.Remove(tableDetail);
ListView1.EditIndex = -1;
Session["ListView1Data"] = lstDetails;
BindData();
}
}
private void DeletedItems(TableDetails tableDetail)
{
List<TableDetails> lstDelItems = new List<TableDetails>();
if (Session["DeletedItems"] != null)
{
lstDelItems = Session["DeletedItems"] as List<TableDetails>;
}
// No need to keep track of New Items(whose ID is 0)
if (tableDetail.Id > 0)
{
lstDelItems.Add(tableDetail);
Session["DeletedItems"] = lstDelItems;
}
}
Now, your save button click event can be
protected void btnSave_Click(object sender, EventArgs e)
{
List<TableDetails> lstDelItems = new List<TableDetails>();
List<TableDetails> lstDetails = Session["ListView1Data"] as List<TableDetails>;
EntityFrameworkModel entity = new EntityFrameworkModel();
if (Session["DeletedItems"] != null)
{
lstDelItems = Session["DeletedItems"] as List<TableDetails>;
}
foreach (TableDetails det in lstDetails)
{
// Insert. For all the new entries, the ID value will be 0
if (det.Id == 0)
{
entity.TableDetails.Add(det);
}
// Update. If ID exists in the db, its a modified data
else if (entity.TableDetails.Any(d => d.Id == det.Id))
{
TableDetails detail = entity.TableDetails.First(d => d.Id == det.Id);
detail.FirstName = det.FirstName;
detail.LastName = det.LastName;
detail.Column3 = det.Column3;
detail.Column4 = det.Column4;
}
entity.SaveChanges();
}
// Delete.
foreach (TableDetails det in lstDelItems)
{
TableDetails detail = entity.TableDetails.First(d => d.Id == det.Id);
entity.TableDetails.Remove(detail);
entity.SaveChanges();
}
LoadListView();
Session["DeletedItems"] = null;
}
Update:
Yes, you need to modify your Updating event. Since all of your new items will have 0 as your ID value, you can't depend with that. You can depend with the RowIndex for this.
protected void ListView1_ItemUpdating(object sender, ListViewUpdateEventArgs e)
{
List<TableDetails> lstDetails = Session["ListView1Data"] as List<TableDetails>;
if (lstDetails.Count >= e.ItemIndex + 1)
{
var tableDetail = lstDetails[e.ItemIndex];
tableDetail.FirstName = e.NewValues["FirstName"].ToString();
tableDetail.LastName = e.NewValues["LastName"].ToString();
tableDetail.Column3 = e.NewValues["Column3"].ToString();
tableDetail.Column4 = Convert.ToDateTime(e.NewValues["Column4"]);
ListView1.EditIndex = -1;
Session["ListView1Data"] = lstDetails;
BindData();
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
How to Design a Restful API for Bulk Inserts and Updates?
How to delete in asp:ListView that uses asp:XmlDataSource?
Does Oracle Coherence support bulk delete operations?
How to intercept and modify bulk updates?
How to use SqlBulkCopy and track Bulk Inserts with Glimpse
UWP, MySQL, populated ListView, implement CRUD operations
How to delete specific listview items in ASP.NET C#?
Performing Inserts and Updates with Dapper
How to implement a Checkbox select all in a Grouped Listview control WPF?
Logging operations, how to implement better
Related Tags