Forms Data Controls :: GridView Updating Having Datasource Datatable?
Jul 16, 2010
I am making shopping cart application.On Viewing Shopping Cart,when i try to update the quatity of product column it permit me to edit but wn i click update link.the gridview disappears wid all products.send me some code snippet in C# as i want only quantity column to be editable.I am using the following code:in Code behind File
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
[code]...
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Jul 1, 2010
I have a datatable for which i'm defining a dataadapter. I'm specifying an updatecommand with sqlparameters for the dataadapter I set the updatecommand's parameters using the following overload:
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The length 16 is used because this is the length of the field according to sql (the image datafield is a pointer of size 16) I noticed .Net is actually truncating the string because of the length i'm setting. An image of size 3kb will properly upload if we set the length field to be greater than 3kb The question I have is what is the proper value (or strategy) to use in order to set for the length field so that ALL images will properly update to the database, with each using the appropriate size.
I guess i could theoretically set the length to be maxint, but this seems sloppy. Looking at sqlparameter documentation i didnt see an 'unlimited' or 'default' length i could set, which would allow each update statement called to use the appropriate size for the data length for that row.
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Mar 7, 2010
Maybe this could be a simple questino, but for me it's difficult to do this action: I have a table in sql server 2005 with some records stored, for example 10 records. The primary key of this table, let's call it "Employee", it's a number field with an autoincrement constraint. I want to store more data into the table by using a OdbcDataTable object and OdbcDataAdapter and adding new rows to the datatable and afeter that use the "Update" method from the OdbcDataAdapter object.
The big deal is this: let's suppose that I want a add a new record to the datatable object, using any method or code sequence that you want. if I have 10 records stored on the data base table, when I retrieve this table schema by using the OdbcDataAdapter "Fill" method, I have a copy of the data base table schema in the DataTable object, right?. if I add a new row on the datatable object, it's suppose that the primary key column of that table must AUTO-INCREMENT the value of the key, I mean if the last value that I store on the table was the number 10 on the PK field, when I add a new row on the datatable object, the PK value on the datatable object must be the number 11 if the autoincrement constraint is present into the DataTable object, but in my case, it doesn't work
So, How can I define the conditions or set the c# data objects properties to wor in that way???. In this moment the PK column on the odbcDataTable doesn't auto-increment its value when I add a new row on it.
Please helpe with this.
PD: I have another question about the DataTable object, how many records can store this object?? I have some problems with this because sometimes when I use the Fill() method to get data into the DataTable or a DataSet object there's no problem if the Fill() method retrieves about 142000 records, but when I retrieve over the 145000 records, when I inspect the DataSet or DataTable object by using the debuging mode, they have null value. Any of you can tell me why this situation ocurrs??
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Mar 9, 2011
i try casting the gridview datasource to datatable using the following code but the datatable always nothing.
Dim DT As New DataTable
DT = DirectCast(gv.DataSource, DataTable)
the gridview is bound using dataset at code behind without using sqldatasource.
i m trying to filter the gridview without geting the data from database, is there is another way to do this?
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Jul 24, 2010
I am new to asp.net.I am buliding an online shopping application.Could anyone tell me the steps to edit records in gridview which have its datasource i.e. datatable.Means the shopping cart wil display its products.i want to do editing in gridview say quantity or product which automatically edit records(quantity) in datatable and then gridview wil again get bind to new edited datatable and able to show edited records say edited quantity of taht product.
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Jul 25, 2010
I have one gridview and i want to take all the values in a datatable or dataview.
I tried like this
DataTable gridTable = (DataTable) dataGrid1.DataSource;
but gridTable is showing null, it should not show null because gridview has lot of records with 3 columns
Is there any way i can convert/store a gridview.Datasource records in a datatable or dataview?
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Nov 19, 2010
I have a GridView that sorts and has paging features. I need to grab the data from the SORTED DATA from the GRIDVIEW and put it into a DataTable. Who Do I get that sorted data gridview and store it into a DataTable. I am an ASP.NET Programmer. Goal: Get and Store Sorted GridView Data into a DataTable.
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Jan 11, 2010
i have the dataset with one table.Table contains three column like 'Name','Location','Pin'.I would like to move the data from another table based on schema.
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Jun 20, 2012
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource1" ForeColor="#990000"
AutoGenerateEditButton="True" onrowupdated="GridView1_RowUpdated"
onselectedindexchanged="GridView1_SelectedIndexChanged"
AllowSorting="True">
[Code] ....
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Sep 29, 2010
Scenario:
I am creating a custom gridview control which has a custom CheckBoxTemplateField column (deriving from TemplateField class). This template field column has custom Checkboxheadertemplate (implementing ITemplate) and CheckboxItemTemplate (also implementing ITemplate). In InstantiateIn method of both templates (header as well as Item template), I am adding a checkbox control which has Autopostback = true.
My requirement is:
I want to mark all the values in the binding column of datasource if checkbox in headertemplate is checked. I dont want to mark only rows visible on grid. I WANT TO MARK ALL ROWS IN DATASOURCE. I want to do this in _CheckedChanged event of checkbox in header template.
Problem I am facing: When I check/uncheck the checkbox in header, it postbacks. so in OnCheckedChanged event, gridview's datasource is null. Secondly, in any event of gridview, I could access only those rows of datasource for which corresponding rows are visible in gridview through Gridviewrow.DataItem property. But I want to set it for all rows in datasource.
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Nov 30, 2010
I am sure I am not the first to ask this question but I cannot find an answer in these or any other forums. I guess I am not wording the question right. In short I have a gridview populated but a database via an SQLDatasource. I have an Edit column in the datagrid and an updatequery in the datasource. When the Edit is click the line goes into edit mode, the user then clicks Update and I get an error. Could not find control 'DropDownList1' in ControlParameter 'Frequency'. The only complication is that there is a drop down control when the "EDIT" column is selected. The dropdownlist gets it list from another SQLDatasource. This all works fine. Here is the code snip:
<asp:GridView ID="GridView1" runat="server" AllowSorting="True" AutoGenerateEditButton="True"
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May 11, 2010
I have a gridview that I'm trying to update the Date something is corrected in the database. When I am putting a new value in, it is updating, but it isn't updating the new value, just the old one that is already there. I cannot figure out why this is happening.
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Jan 28, 2010
Here is the situation I have, I have a repeater inside a Usercontrol. The datasource is a IEnumerable<Investor> Exposed through a UserControl's Property. I have overridden the UserControl's databind event to set the Repeater Datasource before databinding the repeater. When it's not a postback, it databinds find and the events on the repeater item's controls fires up fine. But there is one event on repeater items (Delete Investor) which call back the DataBind of the UserControl after removing the Investor from de datasource. When this Event is called, it does all the work (deleting the investor and so on...) calls back the usercontrol's databind but when (within the usercontrol databind) the repeater is databinded again, the repeater items doesn't update (repeater items for investor not on the DataSource anymore still appears). My ItemDataBind doesn't even fire by then.
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and code bedind
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I Tried with both the Repeater Item Command and each LinkButton Event to see if it would make any difference, but none worked
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Jun 10, 2010
I am trying to use a datasource with a dropdownlist. Eventually, my data source method to call a stored procedure and load the datatable is returns, but for now, I am just creating the datatable manually. I need each item to have two attributes, the text, whixh the user will see in the DDL, and the value that the program will retrieve from and store back to the file.
It is partly working in that the DDL has 3 items, however the text for each item reads "System.Data.DataRowView"
I have to be close, but I can't figure out what I am doing wrong.
[Code]....
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Jan 22, 2010
Can we convert the Repeater items back to a datasource?
At post back, I want to convert the repeater items into a datatable which is a datasource was given to the repeater.
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Dec 14, 2010
I have a parent gridview which has a child gridview in the itemsTemplate. Both are binded to different SqlDataSources. I can successfully update and delete rows in the child gridview. After updating in the child gridview, some related data in the parent gridview are not updated automatically. So i have placed ParentGridview.Databind() in the rowupdated event of child gridview. But it doesnt look working.
How can i accomplish this?
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Jan 27, 2010
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Feb 20, 2011
I have a GridView with 5 fields. Only two of the fields are edittable (the others are READONLY).
I have an UpdateCommand as follows
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:NHLPOOL %>"
SelectCommand="SELECT [PlayerID], [Firstname], [lastname], [Goals], [Assists], [Goals]+[Assists] as Points, [AsOfDate] FROM [PlayerStats], [Player] where [PlayerStats].[PlayerID] =[Player].[ID] ORDER BY Points DESC"
UpdateCommand="UPDATE PlayerStats SET Goals =@GOALS, Assists =@ASSISTS, AsofDate=GETDATE() WHERE PLAYERID = @PLAYERID">
</asp:SqlDataSource>
The issue is I want the PLAYERID GV column to be READONLY but I get a runtime error when updating if the PLAYERID is READONLY.
I get the error "
Must declare the scalar variable "@PLAYERID"."
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Sep 17, 2010
I have a delimted file , like a csv file but the delimters are # and not ,
I assume I would use SqlConnection and SqlDataAdapter
So for a csv file what is the sequence to read in for example c:datademo.csv
What would the connection string be.
Also can you specifiy a different delimiter.
The code below is what I assume it would possibly look likea although its only a frst guess.
[Code]....
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Nov 1, 2010
I am trying to populate a gridview using two tables. I also have a strongly typed dataset and used the method on this page: [URL] the problem is that, when i try to use two table the gridview does show up (I checked through debugging that the datatable comes back as empty).
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Jan 28, 2010
I am using LINQ to SQL and on my DetailsView it updates fine but with my gridview it is not. Both I used template fields so I am not sure what the issue is?
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I have been doing a lot of reading and searching and I cannot figure out why this is not working for me.
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Feb 23, 2010
I was used TextBox in the GridView Then I Replace this textBox with Dropdownlist
and i fetched all the data from the database using DataSource in Editing Mode
But The problem is when i choose item from the dropdownlist to update it,it returns to Empty
(with No values) in the DropDownList??whats the problem?
[code]....
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Sep 7, 2010
I have a gridview and I want to update a cell with a session variable username. In the Gridview1_RowEditing event I have this code :
GridView1.Rows(e.NewEditIndex).Cells(5).Text = Session("username")
It does not give me any errors and seems to work but the grid view cell do not take this session. When I'm clicking on the edit hyperlink this event is triggered.
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Jun 6, 2010
I am trying to update gridview record, i am not getting any error but its not updating the record either.
[Code]....
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Jul 30, 2010
Having a bit of difficulty working this gridview update problem out - I have managed to get edit/update function working but instead of only updating the current gridview row it is updating the whole table I believe this is due to a missing where statement on my Update statement - to single out the row index of my grid row.When I configure my sql datasource I am using custom statements Here is my update statement
UPDATE SimpData SET store_nbr = @store_nbr, date = @date, data_type = @data_type, acct_1 = @acct_1, amt_1 = @amt_1, acct_2 = @acct_2, amt_2 = @amt_2, acct_3 = @acct_3, amt_3 = @amt_3, cheque_nbr = @cheque_nbr, cheque_amt = @cheque_amt, gst_hst = @gst_hst, qst = @qst, comments = @comments, uploaded = @uploaded
Here is my gridview
<asp:GridView
ID="GridView1"
runat="server"
CellPadding="4"
Font-Names="Arial"
ForeColor="#333333"
GridLines="None"
Font-Size="Smaller"
Width="100%"
AllowPaging="True"
OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
OnRowCommand="GridView1_RowCommand"
OnRowEditing="GridView1_RowEditing"
OnRowUpdating="GridView1_RowUpdating"
AutoGenerateColumns="False"
DataSourceID="SqlDataSource1"
OnRowDataBound="GridView1_RowDataBound">
<RowStyle
BackColor="#EFF3FB"
/>
<FooterStyle
BackColor="#507CD1"
Font-Bold="True"
ForeColor="White"
/>
<PagerStyle
BackColor="#2461BF"
ForeColor="White"
HorizontalAlign="Center"
/>
<SelectedRowStyle
BackColor="#D1DDF1"
Font-Bold="True"
ForeColor="#333333"
/>
<HeaderStyle
BackColor="#507CD1"
Font-Bold="True"
ForeColor="White"
Font-Size="Smaller"
/>
<EditRowStyle
BackColor="#2461BF"
/>
<AlternatingRowStyle
BackColor="White"
/>
<Columns>
<asp:ButtonField
ButtonType="Button"
CommandName="Select"
HeaderText="Select item to delete"
ShowHeader="True"
Text="Delete">
<ControlStyle
Font-Size="Smaller"
/>
</asp:ButtonField>
<asp:CommandField
ShowEditButton="True"
/>
<asp:ButtonField
ButtonType="Button"
CommandName="Select"
HeaderText="Select item to upload"
ShowHeader="True"
Text="Upload">
<ControlStyle
Font-Size="Smaller"
/>
</asp:ButtonField>
<asp:BoundField
DataField="store_nbr"
HeaderText="Store Number"
SortExpression="store_nbr"
/>...............
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