Forms Data Controls :: Update Gridview Command With Customized Parameters?
Mar 22, 2011
I have a asp.net gridview control on my page with several fields and a couple of command fields. However, the update command is giving me problems.
Here is what works. The update command works provided I put straight text into the textboxes that appear. I even have one field that contains a dropdown list which works fine.
Here's the problem. I have two fields that need to access their value programmatically. These fields will reflect the current datetime and the current loggedin user from active directory. I have already created public strings in the C# code.
When I run the edit command on the asp form the grid uses one "DataKeyNames" element. With this the grid can update the selectedrow. However, I haven't been able to access it programmatically in the C# code. I can access the selectedrow in the "selectedindexchanged" event but then I am not able to update my fields in the gridview itself. So, part one of my question is how to I access the "DataKeyNames" properties of a gridview control.
if I can't access the "DataKeyName" property perhaps I could set the label nested within the gridview to the "myCurrentUser()" public string. I am inserting my code to hopefully make this clearer.
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Apr 26, 2010
how would i do my Gridview delete command like a update command?
im using a datasource... and my delete command is like my update command... so i can change the status into "INACTIVE"...
DeleteCommand="UPDATE ACCOUNT_MAINTENANCE SET am_status = 'INACTIVE' WHERE (accmain_no = @accmain_no)"
UpdateCommand="UPDATE [ACCOUNT_MAINTENANCE] SET [account_type] = UPPER(@account_type), [min_deposit] = @min_deposit, [min_capital] = @min_capital WHERE [accmain_no] = @accmain_no"
when i press my delete command at gridview... the status changed into "INACTIVE" but when i refresh or press f5... it automatically update the status into "INACTIVE" also...
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Sep 26, 2010
I am trying to use an Update Command within my GridView. I need to find the "FindControl" for the Edit Command textboxes.
Ie. When the user clicks the Edit button, the row is populated with dropdown boxes, textboxes, etc for editting. Then when the user clicks on Update (button) and the GridView1_RowCommand function is activated with 'if (e.CommandName == "Update")' statement with my FindControl. etc. and my sql UPDATE command statements are used. How do I convert my FooterRow info to my Edit FINDCONTROL info?
This is what I have:
[Code]....
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Aug 6, 2010
i am using edit,update,cancel command in gridview, i need to update value in bound field how to retreive that value.
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Apr 3, 2010
I have 3 gridviews in one of my web page, each of which will display different data based on the typeid. I have simplified the system structure in the image below(further description will be stated below the image):
As shown in the image above, the web site(presentation layer) will work closely with the Business Logic layer(BLL) and Data Access Layer(DLL). ObjectDataSource control will be the middle man to select, update, insert and delete the data in the gridviews.
During Select, returned data from the database at DAL will be stored in a datatable and return to BLL and then the website itself.
[code]....
However, the Update(command button) and Delete(template field) doesn't work,the RowUpdating and RowDeleting event wasn't trigger when I click on the button, but it works if I set the gridviews' datasourceid to the objectdatasource.
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Mar 12, 2011
I have a gridview and sqldatasource in a form. My sqldatasource has select,delete and update command. The delete command is working but the update doest not work when I click the update command field.
Here is my code [Code]....
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Feb 17, 2010
Bug: UPDATE command Does NOT Work as Expected on a DataBound GridView This was tested in VS2005 and VS2008
Took a while to figure this out - A simple recurse thru Page Controls Makes UPDATE Not Work as expected.
To Recreate this bug:
A simple Gridview bound to an Objectdatasource on a page with ALLOWEDIT ALLOWDELETE
If one inserts some code (a function call in my example) that just recurses the PAGE controls in either the PAGE_PREINIT, PAGE_INIT, PAGE_INITCOMPLETE events,
Then the UPDATE does not FIRE! and After Pressing UPDATE the GRID does not BIND! You Get A Blank Page - Funny thing tought it's only the UPDATE Functionality that gets affected by this - Everything else works fine including EDIT & DELETE.
If the same function call (recurse thru page controls) is added in the PAGE_PRELOAD, PAGE_LOAD -- Then the UPDATE starts working again as expected.
BELOW Is SAMPLE Code using the NORTHWIND DB Products Table and a Typed DATASET.XSD - You can use your own datasource for the ObjectDatasource - (Note I took out the Foreingkey constraint in products table from Nortwind for delete to work)
NOTE: One should be able to just cut and paste the function PAGECONTROLS_RECURSETEST on any working form that has a bound Gridview with Update functionality and you should be able recreate the bug that way by calling the function from the different page_events
[Code]....
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Aug 11, 2010
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[Code]....
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Mar 27, 2011
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May 10, 2010
I searched a lot of threads but still couldn't get my problem fixed. I have to update the "regform" table with two fields: session_ and session2. These two fields are inside the detailview edititem template which bounded to dropdown list drpsession1, drpsession2 separately. I wanted to pass the update parameters to the update sql UPDATE dbo.regform SET session_=@session_, session2=@session2 where id=@id
the @session_ is bounded to a drpsession1 and @session2 is bounded to drpsession2. I used
ControlID="ctl00$ContentPlaceHolder1$DetailsView1$drpsession1" to access the dropdown list within the detailview, but still couldn't do the updates. What's wrong with my code? Do I have to use the code behind to specify the update parameters? and How to do it? TIA.
<
"
asp:DetailsView
ID="DetailsView1"
runat="server"
AutoGenerateRows="False"
DataSourceID="SqlDataSource2"
Height="50px"
Width="544px"
DataKeyNames="id"
ondatabound="DetailsView1_DataBound">
<Fields>
<
asp:TemplateField
HeaderText="Session -Part I"
SortExpression="session_">
<
EditItemTemplate>
<asp:DropDownList
ID="drpsession1"
runat="server"
DataSourceID="SqlDataSource3"
DataTextField="session_time"
DataValueField="session_id"
SelectedValue='<%# Bind("session_") %>'
AppendDataBoundItems="True"
Width="229px">
<asp:ListItem
Text="Please select"
Value="-1"
/>
</asp:DropDownList>
<asp:SqlDataSource
ID="SqlDataSource3"
runat="server"
ConnectionString="<%$ ConnectionStrings:Connstr %>"
SelectCommand="SELECT dbo.sessions.* FROM dbo.sessions"></asp:SqlDataSource>
</EditItemTemplate>
<
asp:TemplateField
HeaderText="Session - Part II"
SortExpression="session2">
<EditItemTemplate>
<asp:DropDownList
ID="drpsession2"
runat="server"
DataSourceID="SqlDataSource4"
DataTextField="session_time"
DataValueField="session_id"
SelectedValue='<%# Bind("session2") %>'
AppendDataBoundItems="True"
Width="234px">
<asp:ListItem
Text="Please select"
Value="-1"
/>
</asp:DropDownList>
<asp:SqlDataSource
ID="SqlDataSource4"
runat="server"
ConnectionString="<%$ ConnectionStrings:Connstr %>"
SelectCommand="SELECT dbo.sessions2.* FROM dbo.sessions2">
</asp:SqlDataSource>
</EditItemTemplate>
</Fields>
</asp:DetailsView>
<
asp:SqlDataSource
ID="SqlDataSource2"
runat="server"
ConnectionString="<%$ ConnectionStrings:Connstr %>"
UpdateCommand
where regform.id=@id">
="UPDATE dbo.regform SET session_=@session_, session2=@session2 where id=@id">
<UpdateParameters>
<asp:ControlParameter
ControlID="ctl00$ContentPlaceHolder1$DetailsView1$drpsession1"
Name="session_"
PropertyName="SelectedValue"
Type="String"
/>
<asp:ControlParameter
ControlID="ctl00$ContentPlaceHolder1$DetailsView1$drpsession2"
Name="session2"
PropertyName="SelectedValue"
Type="String"
/>
<asp:ControlParameter
ControlID="DetailsView1"
Name="id"
PropertyName="SelectedValue"
/>
</UpdateParameters>
</asp:SqlDataSource>
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Jul 31, 2010
I'm gonna outline the application roughly: it's a tool, where people can upload a CSV-file, which contains their data for some crazy water-plant-biology-stuff. ;) The job of the application is (besides others) to validate their entered species. So far no problem, I've got my string-array with the correct species abbrevations, and i can parse the species names from the user-edited CSV-file.Whenever a species is found, that is not part of the reference-array its being sent to a GridView as a new row. All of the above works fine - if anything isn't explained well, just ask.
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Which might be a solution for the updating-problem: I keep storing the wrong names in the rows, and just add another column next to the species name, where this drop-down-list should appear. Then i add a button, which, when clicked, gets the old value & the new selected value for each row, and updates the data. Should work? So the problem remains: how do I add a template-field with many (<500) items in the .cs-file to a GridView-Column?
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Apr 8, 2010
I'm trying to create a ShoutBox for my site, and for those of you who are not familiar with shoutboxes, they are chat boxes on websites that users can post live messages on, and the other uses will see their message and be able to respond. I didn't find any good ones online, so I started to write my own. I'm doing it with an XML, but I want the user to be able to post messages using a textbox I added (txtMessage) and the button (cmdPostMessage), which should add a new item to the XML file, and all the other uses will receive that message (their xmlDataSource and the DataList will PostBack every second or something like that). It is able to read messages, but not send.I am however facing three problems:
1- I need to find a way for the user's input to be added to the XML.
2- I need to find a way for the current logged-in username to be found, and added to the XML, and also detect if no user is logged in, in which case the user wil receive an alert saying "Please log in to post messages to the ShoutBox" and redirect them to the login page.
Here is the text in the XML
[Code]....
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Jul 12, 2010
I am using asp.net(C#) as platform for building my application. I want to update the values in the database for the particular user & using the following code:
[Code]....
when I run this code, it works perfectly fine & there's no error, but when I check into the database, the values do not change & remains same. The default value in the database is NULL.
Kindly check into the matter & revert ASAP.
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Mar 31, 2010
I use the following with datagrid to call itemcommand or update command etc, and i do this:
If e.CommandName = "doAdd" Then
End If What is the equivalent check in gridview?
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Mar 9, 2010
I have a ListView where I am trying to implement Updating. My update parameters are not sent to update command correctly. The value sent is the original value and ignores what I type into the EditItemTemplate. Running a trace on my SQL Server verifies this. In this example, I am only trying to modify [dedamt]. What is wrong?
[Code]....
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Jun 14, 2010
I have a SQL datasource, hooked to a gridview. When i submit my updated row, the update parameters fills with the original values, instead of the new values. Am i doing something wrong? I have tried to handle everything in the html, and not code any parameter settings. All my update parameters are called the same as the field in my gridview, and i use a prefix infront of the parameter names in my updatecommand, in my case : (instead of @) since i use oracle.
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Aug 13, 2010
I am trying to pass the value of a dropdownlist to the Update section of a listview. The dropdownlist is bound to one datasource which needs to then pass its selected value to the UpdateCommand sql for another datasource. Here is my code:
[code]....
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Apr 3, 2010
I have 3 gridviews in one of my web page. I have simplified the system structure in the image below(further description will be stated below the image): As shown in the image above, the web site(presentation layer) will work closely with the Business Logic layer(BLL) and Data Access Layer(DLL). ObjectDataSource control will be the middle man to select, update, insert and delete the data in the gridviews. During Select, returned data from the database at DAL will be stored in a datatable and return to BLL and then the website itself.
The data in the returned datatable will be filetered by type using RowFilter method and stored into the 3 dataviews. Each dataview will act as the datasource for the 3 GridViews respectively, and therefore I specified the datasource programatically instead of setting the datasourceid for each gridview.
dataview1 = New DataView(dtSelectedTable)
dataview1.RowFilter = "Type='1'"
GridView1.DataSource = dataview1
GridView1.DataBind()
dataview2 = New DataView(dtSelectedTable)
dataview2.RowFilter = "Type='2'"
GridView2.DataSource = dataview2
GridView2.DataBind()
dataview3 = New DataView(dtSelectedTable)
dataview3.RowFilter = "Type='3'"
GridView2.DataSource = dataview3
GridView2.DataBind()
However, the Update(command button) and Delete(template field) doesn't work, the RowUpdating and RowDeleting event wasn't trigger when I click on the button, but it works if I set the gridviews' datasourceid to the objectdatasource. I couldn't figure out why, hope that someone who have come across the same problem couldn't provide some guidance.
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Apr 9, 2010
i'm trying to issue a select command in my app soi could execute the command and retrive the data into a string variable.the problem is that this command is overloaded with DataSourceSelectArgument and i can't figure out what it is.i'm using sql server express and when issue a n insert command for example sq.Insert(); i have no problems.this the command that's holding me:
SqlDataSource sq = new SqlDataSource();
sq.ConnectionString = ConfigurationManager.ConnectionStrings["CustomerDatabaseConnectionString1"].ToString();
sq.SelectCommandType = SqlDataSourceCommandType.Text;
sq.SelectCommand = "SELECT * FROM CustomerTable where customerID = 1";
string result = sq.Select(some overload that's stopping me);
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Feb 3, 2010
How do I view my parameters items ?
I tried this but got this error
[code]....
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Feb 14, 2011
how i can perform Update Row in Gridview using Template Feild's
[Code]....
[Code]....
what will be next step as i know how to write update statement in databasejust want to know how i can catch the template feilds value and update on click of edit
[Code]....
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Feb 12, 2010
I would like to use a command parameter to concatonate two fields
protected void Notes0_Inserting(object sender, SqlDataSourceCommandEventArgs e)
{
e.Command.Parameters["Comments"].Value = Eval("LeadID")&" "&Eval("TextBox1");
}
Where the leadID is based on a query string and comments are entered in textbox1
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Jan 28, 2010
I am using this command to get the value of a particular cell in the GridView: Question: Do you know why I do not get a value in strValue ?
There is definitely value in the grid.
protected void grid_RowCommand(object sender, GridViewCommandEventArgs e)
{
//proceed only if the Details button is clicked...
if (e.CommandName.ToLower() == "details")
{
//Get the row index selected...
int index = Convert.ToInt32(e.CommandArgument);
GridViewRow row = grid.Rows[index];
string strValue = grid.Rows[index].Cells[1].Text;
}
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