Develop Reference

ASP.NET Grid View edit with variables

When editing certain column values in my gridview, other values need to change depending on that value.
For example: http://i.imgur.com/phfVtUq.png
When editing the Truck Diesel column value, the KMPerLiter and RandsPerKM values must be changed according to that value and visa versa. The formulas are as follows:
KMPerLiter = TotaKM/TruckDiesel+TrailerDiesel and RandsPerKM = Amount/TotalKM.
This must be done within the edit column of the gridview.
All these values are then stored in a table in a database.
Here is the ASP.Net html source code:
UpdateCommand="UPDATE [Loads] SET [loadDate] = #loadDate, [loadDay] = #loadDay, [loadClient] = #loadClient, [loadDriver] = #loadDriver, [loadLoadingPoint1] = #loadLoadingPoint1, [loadLoadingPoint2] = #loadLoadingPoint2, [loadLoadingPoint3] = #loadLoadingPoint3, [loadOffloadingPoint1] = #loadOffloadingPoint1, [loadOffloadingPoint2] = #loadOffloadingPoint2, [loadOffloadingPoint3] = #loadOffloadingPoint3, [loadStops] = #loadStops, [loadNumber] = #loadNumber, [loadPodNumber] = #loadPodNumber, [loadAmount] = #loadAmount, [loadTruckReg] = #loadTruckReg, [loadTrailerReg] = #loadTrailerReg, [loadCategory] = #loadCategory, [loadDayOut] = #loadDayOut, [loadNightOut] = #loadNightOut, [loadOdoStart] = #loadOdoStart, [loadOdoEnd] = #loadOdoEnd, [loadTruckDiesel] = #loadTruckDiesel, [loadTrailerDiesel] = #loadTrailerDiesel, [loadInvoiceNumber] = #loadInvoiceNumber, [loadReceiptNumber] = #loadReceiptNumber, [loadKMperLiter] = #loadKMperLiter, [loadRandsPerKM] = #loadRandsPerKM, [loadDriverWage] = #loadDriverWage, [clientRecieved] = #clientRecieved, [loadTotalKM] = #loadTotalKM, [note] = #note WHERE [loadID] = #loadID">
<UpdateParameters>
<asp:Parameter DbType="Date" Name="loadDate" />
<asp:Parameter Name="loadDay" Type="String" />
<asp:Parameter Name="loadClient" Type="String" />
<asp:Parameter Name="loadDriver" Type="String" />
<asp:Parameter Name="loadLoadingPoint1" Type="String" />
<asp:Parameter Name="loadLoadingPoint2" Type="String" />
<asp:Parameter Name="loadLoadingPoint3" Type="String" />
<asp:Parameter Name="loadOffloadingPoint1" Type="String" />
<asp:Parameter Name="loadOffloadingPoint2" Type="String" />
<asp:Parameter Name="loadOffloadingPoint3" Type="String" />
<asp:Parameter Name="loadStops" Type="Int32" />
<asp:Parameter Name="loadNumber" Type="String" />
<asp:Parameter Name="loadPodNumber" Type="String" />
<asp:Parameter Name="loadAmount" Type="Decimal" />
<asp:Parameter Name="loadTruckReg" Type="String" />
<asp:Parameter Name="loadTrailerReg" Type="String" />
<asp:Parameter Name="loadCategory" Type="String" />
<asp:Parameter Name="loadDayOut" Type="Int32" />
<asp:Parameter Name="loadNightOut" Type="Int32" />
<asp:Parameter Name="loadOdoStart" Type="Int32" />
<asp:Parameter Name="loadOdoEnd" Type="Int32" />
<asp:Parameter Name="loadTruckDiesel" Type="Decimal" />
<asp:Parameter Name="loadTrailerDiesel" Type="Decimal" />
<asp:Parameter Name="loadInvoiceNumber" Type="String" />
<asp:Parameter Name="loadReceiptNumber" Type="String" />
<asp:Parameter Name="loadKMperLiter" Type="Decimal" />
<asp:Parameter Name="loadRandsPerKM" Type="Decimal" />
<asp:Parameter Name="loadDriverWage" Type="Int32" />
<asp:Parameter Name="clientRecieved" Type="String" />
<asp:Parameter Name="loadTotalKM" Type="Int32" />
<asp:Parameter Name="note" Type="String" />
<asp:Parameter Name="loadID" Type="Int32" />
</UpdateParameters>
Thanks in advance!

Method 1:
Creating Stored Procedure
Create Proc _SPUpdateTableName
#id int,
#truckvalue numeric(18,0)
as
begin
Update TableName set KMPerLiter = TotaKM/(#truckvalue+TrailerDiesel) , TruckDiesel = #truckvalue where ID =#id
end
On SqlDataSource code :
<asp:SqlDataSource ID="LocalServerDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:SiteSqlServer %>" UpdateCommand="_SPUpdateTableName" UpdateCommandType="StoredProcedure">
<UpdateParameters>
<asp:Parameter Name="id" Type="Int32" />
<asp:Parameter Name="truckvalue " Type="Decimal" />
</UpdateParameters>
</asp:SqlDataSource>
Or Else in RowUpdate Method you can calculate the parameters and assign them to your UpdateCommand statement Parameter :
Method 2:
protected void grdvechile_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
try
{
decimal truckvalue= Convert.ToDecimal( grdvechile.Rows[e.RowIndex].Cells[1].Text);
// fetch all value as needed and typecast
decimal KMPerLiter = TotaKM/(truckvalue+TrailerDiesel);
//Pass your required parameter
LocalServerDataSource.UpdateParameters["truckvalue"].DefaultValue = truckvalue;
LocalServerDataSource.UpdateParameters["KMPerLiter "].DefaultValue = KMPerLiter ;
LocalServerDataSource.Update();
}
catch { }
}
Note: These code is only on logic I thought will be appicable for your situation not tested.Change as per your Requirment.

No need.. Only create a virtual table to pick up the Grid view value, Then change it according to your requirement, again reassign it to Grid view

Trying to insert data into database with sqldatasource, I get this error: ora-01745 invalid host exception, why?

I have this code in my aspx file:
<asp:SqlDataSource ID="RegisterUserSQL" runat="server" ConnectionString="<%$ ConnectionStrings:UserQueries %>" ProviderName="<%$ ConnectionStrings:UserQueries.ProviderName %>"
InsertCommand="insert into users (firstname, lastname, username, password, email, gender, birthdate, nationality, currentcity)
values (:firstname, :lastname, :username, :password, :email, :gender, :date, :nationality, :currentcity)">
<InsertParameters>
<asp:Parameter Name="firstname" Type="String" />
<asp:Parameter Name="lastname" Type="String" />
<asp:Parameter Name="username" Type="String" />
<asp:Parameter Name="password" Type="String" />
<asp:Parameter Name="email" Type="String" />
<asp:Parameter Name="gender" Type="Char" />
<asp:Parameter Name="date" Type="String" />
<asp:Parameter Name="nationality" Type="String" />
<asp:Parameter Name="currentcity" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
Then this is the code behind:
RegisterUserSQL.InsertParameters["firstname"].DefaultValue = SavedFirstnameBox.Text;
RegisterUserSQL.InsertParameters["lastname"].DefaultValue = SavedLastnameBox.Text;
RegisterUserSQL.InsertParameters["username"].DefaultValue = SavedUsernameBox.Text;
RegisterUserSQL.InsertParameters["password"].DefaultValue = SavedPasswordBox.Text;
RegisterUserSQL.InsertParameters["email"].DefaultValue = SavedEmailBox.Text;
RegisterUserSQL.InsertParameters["gender"].DefaultValue = SavedGenderBox.Text;
RegisterUserSQL.InsertParameters["date"].DefaultValue = BirthdateBox.Text;
RegisterUserSQL.InsertParameters["nationality"].DefaultValue = SavedNationalityBox.Text;
RegisterUserSQL.InsertParameters["currentcity"].DefaultValue = SavedCurrentCityBox.Text;
RegisterUserSQL.Insert();
It stops at the last insert() statement and gives the error.
Any suggestions?

GridView update/delete crashes

I have a gridview of my table. I established a AccsessDataSource to my database. The Accsess datasource is configured so the sql scentance is: SELECT * FROM [Users] In the advanced settings I checked "Generate INSERT, UPDATE, and delete statements" I enabled editing and deleting. My source code shows this:
<asp:AccessDataSource ID="AccessDataSource2" runat="server" DataFile="~/App_Data/RunRunDB.mdb"
DeleteCommand="DELETE FROM [Users] WHERE (([username] = ?) OR ([username] IS NULL AND ? IS NULL))"
InsertCommand="INSERT INTO [Users] ([Fname], [Lname], [Email], [Bday], [pswrd], [admin], [username]) VALUES (?, ?, ?, ?, ?, ?, ?)"
OldValuesParameterFormatString="original_{0}"
SelectCommand="SELECT * FROM [Users]"
UpdateCommand="UPDATE [Users] SET [Fname] = ?, [Lname] = ?, [Email] = ?, [Bday] = ?, [pswrd] = ?, [admin] = ? WHERE (([username] = ?) OR ([username] IS NULL AND ? IS NULL))">`
<DeleteParameters>
<asp:Parameter Name="original_username" Type="String" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="Fname" Type="String" />
<asp:Parameter Name="Lname" Type="String" />
<asp:Parameter Name="Email" Type="String" />
<asp:Parameter Name="Bday" Type="DateTime" />
<asp:Parameter Name="pswrd" Type="String" />
<asp:Parameter Name="admin" Type="Boolean" />
<asp:Parameter Name="username" Type="String" />
</InsertParameters>
<UpdateParameters>
<asp:Parameter Name="Fname" Type="String" />
<asp:Parameter Name="Lname" Type="String" />
<asp:Parameter Name="Email" Type="String" />
<asp:Parameter Name="Bday" Type="DateTime" />
<asp:Parameter Name="pswrd" Type="String" />
<asp:Parameter Name="admin" Type="Boolean" />
<asp:Parameter Name="original_username" Type="String" />
</UpdateParameters>
</asp:AccessDataSource>
Each time i run my website i get an error that says: You do not have a value for one or more of the required parameters.
Thanks..

Your problem is here:
WHERE (([username] = ?) OR ([username] IS NULL AND ? IS NULL))
Command parameters cannot be used to specify table or column (field) names; they only specify column values. You will have to adjust your UpdateCommand and DeleteCommand strings to specify the column name explicitly.

DetailsView update

I have a GridView that shows all the registed users and some of their information and when you choose the "select" link off the side, it shows a DetailsView with all the details related to that user. The select works fine and updates the details view for the selected user, and when I try to edit the DetailsView, it will update the database and fill in the information updated for ALL the users when changing the fields (eg. if I change the customers first name, everyone registered will get that name). Here's my aspx code for my SqlDataSource:
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ApplicationServices %>" OldValuesParameterFormatString="original_{0}"
SelectCommand="SELECT * FROM [UserProfile] ORDER BY [Email], [LastName], [Company]"
UpdateCommand="UPDATE [UserProfile] SET [LastName] = #LastName, [PartsList] = #PartsList, [UserName] = #UserName, [Question] = #Question,
[Answer] = #Answer, [Role] = #Role
WHERE [FirstName] = FirstName AND [Company] = Company">
<UpdateParameters>
<asp:Parameter Name="FirstName" Type="String" />
<asp:Parameter Name="LastName" Type="String" />
<asp:Parameter Name="Company" Type="String" />
<asp:Parameter Name="PartsList" Type="String" />
<asp:Parameter Name="UserName" Type="String" />
<asp:Parameter Name="Password" Type="String" />
<asp:Parameter Name="Email" Type="String" />
<asp:Parameter Name="Question" Type="String" />
<asp:Parameter Name="Answer" Type="String" />
<asp:Parameter Name="Role" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>

You forgot #original_ in your Where parameters
Change UpdateCommand to:
UPDATE [UserProfile] SET [LastName] = #LastName, [PartsList] = #PartsList, [UserName] = #UserName, [Question] = #Question,
[Answer] = #Answer, [Role] = #Role
WHERE [FirstName] = #original_FirstName AND [Company] = #original_Company

DataBinding: 'DatePickerControl.DatePicker' does not contain a property with the name 'Text'

I tried using date/time, time, but it doesn't help.
Exception Details: System.Web.HttpException: DataBinding: 'DatePickerControl.DatePicker' does not contain a property with the name 'Text'.
Source Error:
Line 31: DataSource.InsertParameters.Add("UserId", UserGUID.ToString());
Line 32:
Line 33: DataSource.Insert();//here is the error
Line 34:
Line 35: }
Here is the html code :
<asp:SqlDataSource ID="InsertExtraInfo" runat="server" ConnectionString="<%$ ConnectionStrings:ASPNETDBConnectionString1 %>"
InsertCommand="INSERT INTO [UserDetails] ([UserId], [CustName], [CustNum], [CustRole], [CustStatus], [PName], [PEmail], [PRole], [WedDate]) VALUES (#UserId, #CustName, #CustNum, #CustRole, #CustStatus, #PName, #PEmail, #PRole, #WedDate)"
ProviderName="<%$ ConnectionStrings:ASPNETDBConnectionString1.ProviderName %>">
<InsertParameters>
<asp:ControlParameter Name="CustName" Type="String" ControlID="CustName" PropertyName="Text" />
<asp:ControlParameter Name="CustNum" Type="String" ControlID="CustNum" PropertyName="Text" />
<asp:ControlParameter Name="CustRole" Type="String" ControlID="CustRole" PropertyName="Text" />
<asp:ControlParameter Name="CustStatus" Type="String" ControlID="CustStatus" PropertyName="Text" />
<asp:ControlParameter Name="PName" Type="String" ControlID="PName" PropertyName="Text" />
<asp:ControlParameter Name="PEmail" Type="String" ControlID="PEmail" PropertyName="Text" />
<asp:ControlParameter Name="PRole" Type="String" ControlID="PRole" PropertyName="Text" />
<asp:ControlParameter Name="WedDate" Type="String" ControlID="WedDate" PropertyName="Text"/>
</InsertParameters>
</asp:SqlDataSource>

Set PropertyName="SelectedValue" and Type="DateTime"
<asp:ControlParameter Name="WedDate" Type="DateTime" ControlID="WedDate" PropertyName="SelectedValue"/>
EDIT:
try
<asp:ControlParameter Name="WedDate" Type="DateTime" ControlID="WedDate" PropertyName="SelectedDate"/>

Change
Type="String" to Type="DateTime" and
PropertyName="Text" to PropertyName="SelectedDate"
on this line
<asp:ControlParameter Name="WedDate" Type="DateTime" ControlID="WedDate" PropertyName="SelectedDate" />