Forms Data Controls :: To Detect The Old Values Of The Gridview On Submit?
Nov 9, 2010
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I have a two gridviews that I populate it through some tables from a database.
In the same page I have a ASP:Button with onclick event.
When click is perform I wish to write a code that compares the old values of both gridviews (that retrieved from database), with the new values, and if changes were made then create the changes in the database.
I think that the best way is to loop every gridview sepertly, and compares it with the values in the database
How do I do that? Do you have a sample code that loops on gridview and compares with the old values to detect changes?
<asp:GridView ID="GridViewRDR1_Hidden" runat="server" >
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkRDR1Hidden" runat="server" AutoPostBack="true" onclick="javascript: calculateTotal();" />
</ItemTemplate>
</asp:TemplateField>
how do i write a javascript fucntion to check whether the checkbox was checked or not?
I have a GridView where I have a ItemTemplate and where I have set 5 rows to with a buttoncontrol on each row.What I am trying to do is in the _Click event of the button, detect which rowIndex this button was clicked on but are not sure what I am missing in this code ?
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I am currently working with reading data from a USB card reader and it sends a page submit command along with the card track data.
Is there a way for me to detect a page submit command and can I programmatically disable the submit command?
if a cell background colour is dark (not just black, could be many shades of grey) and then change the cell font to a lighter colour so as to contrast the background colour and make the text easier to read?
View 4 RepliesI have three drop down lists that are all databound to a gridview. When the user selects 1. a school, 2. a house number, and 3. a street from seperate drop down lists, bus stops for that address are displayed in a gridview. Everything works fine. After the user selects a valid school/house number/street combination the gridview automatically displays. I would like to add a "Submit" button and not have the gridview display until this button is clicked.
View 6 RepliesI have a submit button on form and want to read all the values from a gridview and the embeddd dropdownlists within some of the columns of the gridview.The gridview is added programmatically and therefore I use findcontrol to find it and then use it to iterate through the rows:
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When i step throught the code the values are coming back as empty strings although they are populated on the form? Some of the columns are dropdownlists also and I am attempting to use findcontrol to get these values also but the are just not finding the ddls (i.e null reference)
I'm using objectdatasource to get my data. it works fine. Thecurrentway how it works. When the page opens it loads the gridview.but I don't want this.I would like to load the gridview after I press a submit button. so infact after postback...I tried to remove the select Method in aspx and set programmaticallyin the submit button eventhandler but then I get an error thatSelectmethod is not set.Can someone advice me how I can load the gridview usingobjectdatasource after pressing a submit button?
View 20 Repliesi take data from Sqlserver database , and my prblem is that i want to get old and new values from gridview and base on that i want to change there background colors .. i try gridview rowupdating , editing ,updated Events but when i debug no break point hit and there was no value in ViewSate that i declare ,
View 2 RepliesI have a master page with a form which has dropdown list control,text box,radio button controls.The entered and selected values get lost after I clicked on submit button.It goes back to original state when the page first loaded.Any idea why and how to retain these value?
View 9 Repliesin my asp.net+vb web with access database. i have gridview. i had added a form with submit button to add the data in gridview.
i am using accessdatasource to bind the data to gridview.
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim connectString As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:webauth.mdb"
Dim con As OleDbConnection = New OleDbConnection(connectString)
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even after the data inserted message flshes the data inserted is not viewed in the gridview . when i press F% or refresh tha page the gets displayed in gridview. how can i solve the problem
i am using a gridview in my web page,i used to bind the database records to the gridview..my columns are name,empid,company name,pl leave,sl leave,total leave taken here total leave taken is not a database fields,in the page i want to fill the records once loaded pl leave and sl leave is added and display in the total leave taken column..it working properly when all pl ans sl columns fill with numbers,if some pl and sl leave having blank values.it showing an error like input sting was not in correct format..this is my code
<Columns>
<asp:BoundField DataField="slno" HeaderText="SerialNo"
SortExpression="slno" />
<asp:BoundField DataField="ecode" HeaderText="Employee Code"
SortExpression="empcode" />
<asp:BoundField DataField="ename" HeaderText="Employee Name"
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I'm lost. I have a sub gridview in a gridview. In subGridbiview I have a button. How do I can clicking the button and get values outside the gridview? The subgridview not present the events ...
------------------------Gridview 1------------------------------------------
| cell(0) | cell(1) | Cell(2)| Cell(3 - ITEM TEMPLATE) | -
| | | | # # # SubGridview1 ######### -
! x1 | Y1 | Z1 | # Cell(0) ! Button #-
! | | | ######################-
------------------------------------------------------------------------------
| | | | # # # SubGridview1 ######### -
! x2 | Y2 | Z2 | # Cell(0) ! Button #-
! | | | ######################-
------------------------------------------------------------------------------
how do I click on the child gridview and get the values of the parent gridview? no events in the child gridview no number indexrow on the parent gridview I'm lost.
I have one filed that is encrypted using Rajindal algorithm and stored in MSSQL db.When I retrieve that column in gridview it's displayed in encrypted. I have the code that decrypts it but the problem is:How can I all loop throw this column values in the gridview and decrypt them all and display it in the gridview decrypted.See my code below:
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how to get the values text box values to gridview..
if i enter any text in text box those values should display in gridview.
after entering of 2 or 3 records, i will click on save then all the values of grid should insert in to DAta Base.
i dont want to get the values form Database to Gridview.
how to retrive the values form Database to Gridview.
i just want to display the values which are there in Textbox...
I would like to ask a question on the visual basic codes to loop the gridview to retrieve the values and based on the values, it will be provided as parameters to update to the database table using stored procedure.
Firstly, I have a gridview named grvProduct. The page (ui) will be loaded with data from the database with the use of stored procedures. And only certain values can be edited through the use of template in gridview. So based on those edited values, I'm supposed to pass these values as parameters to the stored procedure which will then update a database table.
Let say, I have 3 records retrieved from the database and displayed in the gridview. And I would like to edit a values in the 3 records, how do I do batch update and pass those parameters to the stored procedure? I went to debug and step through the visual basic codes and realised there were too many arguments specified because I actually loop the gridview.
Below is my visual basic codes:
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Below is my Stored Procedure code:
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I believe it is the error in the looping of the gridview which results that I could not batch update the data/values.
I have a databound Gridview (with a LINQ datasource). The gridview displays questions from the SQL DB to the user. I've inserted a radio button list into the gridview with 3 horizontal radio buttons with fixed values of 1,2,3 for the user to select. I have a question ID, a tempuserID, and AnswerValue columns set up in the database. It all works nicely.
After the user selects radio buttons, I would like for them to push a button to submit the QuestionID, the associated Radio Button Value (AnswerValue) and their tempUserID into the DB. How do I do this? I'm not sure what to do next and what VB/LINQ code to put in the code behind file in the button click event handler. I'm also not sure on what to use for the tempUserID, can I use the sessionID? I'm using VB and here's my code:
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I've got a problem with my onrowdatabound function. The situation is like this:
protected
void gvSQL_RowDataBound(Object sender,
GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
switch (Session["Filter"].ToString())
{
case "NonZero":
if (e.Row.Cells[9].Text == "0")
{
e.Row.Visible = false;
}
break;
}
}
}
At the end I need to kill the Session, so my plan is to detect if it reaches the last row. Then I can kill it. Does anyone know how to do this? Or is there someone that knows a better to fix this?
I have a problem that can't find a way to do it, I have a gridview with this columns:
ID | AreaName | CostCenter
with the "Enable Editing" option check and what I want to do is to get the values of areaname and costcenter and assign them to a label control so I can use the values for something else, for example:
ID AreaName CostCenter
1 Multiconector 1025
2 One Conector 2065
3 Plug & Play 1445
4 Splitter 1598
5 FNI 4298
and if I hit the edit button of the row with ID 4, assign the values to the labels lblAreaName = Splitter and lblCostCenter = 1598
Before I edit them, and so on with the rows I want to edit.
is there any simple way to detect that I'm on the last page of my ListView? I need this because I want to fill empty space below my ListView with a panel if number of rows is smaller then 15 (Rows per Page)
For example (logically): If MyListView = LastPage....Panel.Enabled=True
I want to get the values from a cell in a gridview so can I do that without selecting a row. Its something like this I have a drop downmenu and based on the value selected in the dropdown menu I have to change the presentation of gridview without going to the database.
View 3 RepliesHere is the code with the issue:
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The value of txtName, for example, contains the value prior to editing and clicking update. Here is the grid code:
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Snap shot of asp code
<Columns>
<asp:BoundField DataField="DeptarmentID" HeaderText="DeptarmentID" ReadOnly="true" />
<asp:BoundField DataField="DepartmentCode" HeaderText="DepartmentCode" />
<asp:BoundField DataField="DepartmentName" HeaderText="DepartmentName" />
<asp:BoundField DataField="Active" HeaderText="Active" />
</Columns>
snap shot of page behind
protected void GridViewDept_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow row = GridViewDept.Rows[GridViewDept.EditIndex];
string code = ((TextBox)(row.Cells[2].Controls[0])).Text;
string name = ((TextBox)(row.Cells[3].Controls[0])).Text;
bool active =((TextBox)(row.Cells[4].Controls[0])).Text=="True"?true:false;
//bool active = ((CheckBox)(row.Cells[4].Controls[0])).Checked;
int id = System.Convert.ToInt32(row.Cells[1].Controls[0]);
}
I get error on the last line stating out of index error, how do get the value which is not set editable in the gridview
I need to get values of all individual cells from the row of a grid view and assign eac one fo them to seperate variables. Should i just access the control values directly from the gridview (the controls are template fields) or is it best to run an sqlq select query for each value i want to retrieve.