DataSource Controls :: How To Update Key Fields Using 'old Values'
Jun 29, 2010
Have been trying to update some key fields but cannot get it working. I have the form working fine updating non key fields. I found some old threads on similar topics but none answering my question. I am using a FormView and a sqlDataSource
Question: What steps do I need to take to update key fields using a formview and a sqldatasource?
Additional Information: I have tried the following
Adding OldValuesParameterFormatString="old_{0}" to sqldatasource Adding to update parameters the old_myfield reference Adding DataKeyNames to the formview (note all key fields are in datakeynames and I only want to update the one)also when using the asp parameters do they need to be in same order as query and repeated as many time as used? Or just the same order as first referenced i.e. only defined once? Or any order?
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Sep 3, 2010
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Jan 21, 2010
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Apr 12, 2010
I have a typical gridview/formview master control setup. When I try to update or insert I don't get any errors but it also doesn't work. When I try to insert data all I get are null values and when I update, none of the values are updated. The formview looks like its working, but just doesn't. The primary key is an identity and it auto-increments by one.
[Code]....
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Jun 14, 2010
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[DataContract()]
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[code]...
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Mar 24, 2010
I am populating data into formfields when i select checkbox in a grid view with the following code.I have 20 record set in database,Quotenumber(Main column) starts 3001 ,3002,3003..........3020.I am allowing duplicate entries meant that i have 4 recordset only on 3000 quotenumber like wise i may have 3or more record set on 3010,problem here is when i select first one of 3000(Quotenumber) it is supposed to populate the record set of first one of 3000 but only last one of 3000(quotenumber) is getting populated into form field.Can any one provide solution to this.
Code for Populating Data into formfield when you select checkbox ina grid view.
Dim indx As Integer
Dim connectionString As String = "Database=xxxx;" & "Data Source=localhost;" & "User Id=root;Password=xxxx"
Dim query As String = "SELECT QuoteNumber,Revision,Vendor,PartNumber FROM quotes order by QuoteNumber"
Dim connection As New MySqlConnection(connectionString)
Dim da As New MySqlDataAdapter(query, connection)
Dim ds As New DataSet()
Dim myAdapter As New MySqlDataAdapter
myAdapter = New MySqlDataAdapter(query, connection)
myAdapter.Fill(ds, "QUOTES")
Dim dt As DataTable = New DataTable() 'DataTable Initializes a new instance of the DataTable class with no arguments.
da.Fill(dt)
Dim checkbox As CheckBox = CType(sender, CheckBox)
checkbox.Checked = True
Dim row As GridViewRow = CType(checkbox.NamingContainer, GridViewRow)
Dim i As Integer
For i = 0 To dt.Rows.Count - 1 Step i + 1
If (dt.Rows(i)("QuoteNumber").ToString = row.Cells(1).Text.ToString()) Then
indx = i
End If
Next
DDQuote.Text = dt.Rows(indx)("QuoteNumber").ToString()
txtRev.Text = dt.Rows(indx)("Revision").ToString()
DDVend.Text = dt.Rows(indx)("Vendor").ToString()
txtPart.Text = dt.Rows(indx)("PartNumber").ToString()
GridView code
<asp:GridView ID="GVData" runat="server" Height="75px" Width="76px" CaptionAlign="Top"
Font-Size="Medium" EnableModelValidation="True"
BackColor="White" BorderColor="#010101" BorderStyle="Groove"
BorderWidth="1px" CellPadding="4" AlternatingRowStyle-BackColor = "#87CEFA">
<Columns><asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" AutoPostBack="true" QuotesKey='<%#Eval("QuoteNumber").ToString() %>' onclick="jsEnableDisableDeleteButton(this);" OnCheckedChanged="chkSelect_CheckedChanged" />
</ItemTemplate>
</asp:TemplateField></Columns>
<EditRowStyle BorderColor="#FFFFCC" />
<FooterStyle BackColor="White" ForeColor="#330099" />
<RowStyle BackColor="#F0F8FF" ForeColor="Black" />
<HeaderStyle BackColor="#F06300" Font-Bold="false" ForeColor="#FFFFCC" />
<AlternatingRowStyle BackColor="#ADD8E6"></AlternatingRowStyle>
</asp:GridView>
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Nov 16, 2010
I have a page that binds data from DB to a DetailsView.I want to use the auto-generated Update command.
Everything went OK, and also updating was successful, but if I remove any field that I don't want to have chance to update, then the Update command doesn't update! the old values retain!
I mean: if all of the fields are present in the detailsView, the update will be OK, otherwise, the update will NOT update any thing.I've tried to mark the fields that I don't want to view as "Visible = 'false'" but with no good results!
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Apr 13, 2010
I have a Gridview showing the data on one of my tables, and when I try to edit the data in one of the columns after I click update, rather than updating the record with the new value I typed in, the rows become null as in, everything in the row I just edited disappears. This inmediatly makes my application crash because one of the fields in my table (IssueDescription) doesn't allows null values.
This is the code, which is actually 100% auto-generated from when I created the GridView control and specified in the options to implement update, delete, edit options.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" DataKeyNames="ticketNum"
DataSourceID="SqlDataSource1" [code].....
What is making the rows turn into null after the update? I did some research and tried to define the Update behaviour myself using RowUpdating function. After hours of learning how to use it I got it to "work", but because the Update turns everything to null when it updates, the sqlconnection command I use to do the query sends null anyways. I can paste the C# code if you'd like to see it, though I'd rather not use it if the auto-generated by asp above can be fixed instead.
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Mar 13, 2010
i am still stcuk with my project and unabale to perform calculation on my edited gridview..
here is my problem :
i have fields (f1,f2,f3, f4...) pulled from my sql data base table. into a gridview.
the "f4" field value is based on some calculation done on f1, f2 & f3 field values..
1- i need to have the same calculation done when i edit and update f1, f2 & f3 on my gridview...
more complicated..
2 -my calculation are based on a javascript function ...
a- how can i pass the fields values to the JavaScript variables...perform the calculation....then reassign back the result varibale to the f4 field ?? ..then update my gridview with the new calculation..
[code]....
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I'm trying to use the DetailsView to make Updates. The problem is that it can't handle empty fields even though the underlying table field allows nulls.
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[Code]....
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This is my code i have for the SelectedIndexChanging event of the gridview
[Code]....
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Jan 31, 2011
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protected void btnGen_Click(object sender, EventArgs e)
{
for (int i = 0; i < Convert.ToInt32(tbNum.Text); i++)
{
// label and textbox needed
Label lblSch = new Label();
TextBox tbSch = new TextBox();
Label lblWsGrp = new Label();
DropDownList ddlWsGrp = new DropDownList();
CompareValidator cvSame = new CompareValidator();
cvSame.ID = "cvSame" + i;
cvSame.ErrorMessage = "Date cannot be the same";
cvSame.Operator = ValidationCompareOperator.NotEqual;
cvSame.Type = ValidationDataType.Date;
cvSame.Display = ValidatorDisplay.Dynamic;
cvSame.EnableViewState = true;
cvSame.ControlToValidate = (tbSch.ID);<<<<< what should be the value in here?
cvSame.ControlToCompare = (tbSch.ID);<<<<<<<<<< and here?
//schdule date
lblSch.ID = "lblSch" + i;
lblSch.Text = "Session Date : ";
lblSch.EnableViewState = true;
tbSch.ID = "tbSch" + i;
tbSch.Width = 210;
tbSch.Height = 27;
tbSch.EnableViewState = true;
//workshop grp
lblWsGrp.ID = "lblwsgrp" + i;
lblWsGrp.Text = "Workshop Group : ";
lblWsGrp.EnableViewState = true;
ddlWsGrp.ID = "ddlWsGrp" + i;
ddlWsGrp.Height = 27;
ddlWsGrp.Width = 210;
ddlWsGrp.EnableViewState = true;
ddlWsGrp.Items.Add("1");
ddlWsGrp.Items.Add("2");
//table to store data
TableRow trow = new TableRow();
TableRow trow2 = new TableRow();
//row1
TableCell tc1 = new TableCell();
TableCell tc2 = new TableCell();
TableCell tc3 = new TableCell();
TableCell tc4 = new TableCell();
//row2
TableCell tc5 = new TableCell();
TableCell tc6 = new TableCell();
TableCell tc7 = new TableCell();
TableCell tc8 = new TableCell();
TableCelltc9 = new TableCell();
tc1.Controls.Add(lblSch);
tc2.Controls.Add(tbSch);
tc3.Controls.Add(lblWsGrp);
tc4.Controls.Add(ddlWsGrp);
tc5.Controls.Add(space);
tc6.Controls.Add(CeSess);
tc7.Controls.Add(space);
tc8.Controls.Add(space);
tc9.Controls.Add(cvSame)
trow.Cells.Add(tc1);
trow.Cells.Add(tc2);
trow.Cells.Add(tc3);
trow.Cells.Add(tc4);
trow2.Cells.Add(tc5);
trow2.Cells.Add(tc6);
trow2.Cells.Add(tc7);
trow2.Cells.Add(tc8);
trow2.Cells.Add(t9);
this.table3.Rows.Add(trow);
this.table3.Rows.Add(trow2);
}
}
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I have a GridView that gets populated with data from a SQL database
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I've been using the FilterExpression for the building of my GridView. I've built with this ability before, normally for searching for the name of an individual. However, the new project I'm working on has a small problem. I'm using an AND statement to filter the name via textbox and I'm also checking if the form was completely finished and if the form is reviewed via radio buttons.
Below is the code, but the problem is this. If any of the fields are blank (text field is left blank or the "both" is selected from the radio buttons) the form doesn't process my filter.
Is there an easy way to apply all three filters in a mix and match fashion (like no name, completed, not reviewed or any combination thereof)?
[Code]....
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Here is the sqldatasource config code: <asp:SqlDataSource ID="SqlDataSource1" runat="server"
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how can i attach a dataconvertion like this
[Code]....
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