C# - How To Edit / Update Records From A Database Using Textbox
Mar 21, 2011
I have in my page an edit button and textboxes. I want to edit one single record from the database to these textboxes. I wrote the following code, when I click the edit button then I have the results. The results load in my textboxes. But when I try again to run the page with the same ID for second time then I have this error 'Specified cast is not valid.' What's going wrong? I used int ID=3; to get the 3rd record in this example
[code].....
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Similar Messages:
Feb 22, 2010
I am doing update query to edit my records and save to my database...I am getting the query expression exception...syntax error (missing operator) in query expression 'WebLogin=krish'.
string strUserName = Request.QueryString["UserName"].ToString();
DateTime dateTimeNow = DateTime.Now;
string ConnString = ConfigurationManager.ConnectionStrings["Data"].ConnectionString;[code]....
I am getting the exception syntax error (missing operator) in query expression 'WebLogin=krish'.
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Mar 14, 2011
I have an ASP.NET web form application that on the server side I need to know the user's identity. I do not need to impersonate the user. I just need their username so I can update some records in a database correctly.When the request is processed I have the following line of code:
string userName = Request.LogonUserIdentity.Name;
if(true == string.IsNullOrEmpty(userName))
{
logger.logwarning("missing username");
}
else
{
logger.loginfo("update by {0}", userName);
}
In my development & QA environment this works perfectly - I see the userName in the log file and all of the database records have the lastModifiedBy field filled in correctly. However, when we go to production - userName is an empty string.
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Feb 3, 2011
I have a datatable with some records.
i want that if record id is exists in database then update the record otherwise insert the record.
But i don't want to hit database again and again, i want to accomplish the task on a single hit.
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Aug 6, 2010
I am trying to update a textbox with the current days date when a checkbox field is checked during Edit of detailsview
The current script I have is which gives me a : Object reference not set to an instance of an object on line 3
[Code]....
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Jul 30, 2010
When a user enters a value I want to check against the other values in the database before allowing the record to be inserted.
It is a nvarchar type column.
Is it best to use a unique constraint (if so, how) or what would be the way to programatically check to make sure this name does not exist. It is not a username, just a name value that will be used in routing.
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Aug 16, 2010
My gridview was working just fine until I converted the Officer Report collum to a templatefield so I could have a multiline text box. Now when I go into edit mode and press update, it doesn't update. I don't know what I am missing here?
[Code]....
Here is the datasource information.
[Code]....
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May 7, 2015
How to add data to grid with on click of button, without save to database, and on again click to button data will append to grid in new row.
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May 7, 2015
how to insert,update,delete row in gridview without saving in database ?suppose 1 textbox,1 button and 1 gridview .textbox and button outside of gridview.
what is the coding of this project ?
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Mar 10, 2013
[URL]
but i wanted know,how to update the country of any customer by just choosing it from the dropdownlist and updating it in the databse.
i wanted to add a common update below that updated the country of customers.
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May 7, 2015
I have made a DetailsView which in DetailsView there is action to add the data, change data and delete the data ..how to save, change, delete data, which is in the DetailsView without saving it in the database?so far I use viewstate, but I do not know how to apply it in DetailsView ..
how to create insert , update , delete . in detailsview without saving in database ..
private void Bindemptydt() {
//Declare a datatable for the gridview
DataTable dt = new DataTable();
//Add Columns to the datatable
dt.Columns.Add("report_id");
dt.Columns.Add("param_field");
dt.Columns.Add("param_label");
[code]....
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May 7, 2015
Insert Edit Update Delete (CRUD) in GridView using MySQL Database?
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Jan 25, 2011
I have a user requirement to hav the ability to directly edit the gridview without having to click the edit link. I was thinking of showing dropdown lists for each column-to-row so that the user can select the values for each record. Then the table will be updated accordingly (no update link).
Is this possible or do I still need the edit template and specify the item template with the dropdown list?
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Oct 22, 2010
i am trying to update my database via a textbox on my web page.
so that when a number is entered into this textbox and the button is clicked, it goes and changes the previous value to the one u have just entered.
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
Try
' cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsAshMyDocumentsplatypus_holidays.mdb;") 'Connection String
cn.Open()
str = "update holidays set holidays_left=" & CInt(TextBox3.Text)
cmd = New OleDbCommand(str, cn)
icount = cmd.ExecuteNonQuery
TextBox4.Text = "The value was change to " & icount
Catch
TextBox4.Text = "The value was not Updated"
End Try
update_holiday_values()
cn.Close()
End Sub
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May 11, 2010
There is an asp.net Page in which i have to entered the quantity in the textbox txtRQ..Now if i select yes in the dropdownlist named ddlMR,this qty of the textbox should get added to the qty field of an oracle table GOODSMASTERand if i select NO in the dropdownlist ddlMR, this qty should be added to the qty field of another table called SALESRETURNDETAILS.
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Jan 21, 2010
my database does not update when i pass edited values from textboxes, which is kind of weird. I even try using vb class file to receive the values. but it just never do so.
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Mar 31, 2010
The website is over half way done and the functionality for the blog is (except for adding posts) is already implemented and working correctlyI have a SQLExpress 2008 backendBlog posts are rendered on the page with full HTML markup within a label control.
All of the above is done and working. Though I am essentially new to creating websites with ASP.NET, CSS and SQL, I am sure that I could simply carry on and make a login page with some controls that would allow me to add records (blog posts) directly to the database on the host server. However, I am fearful of doing this because I know that malicious code can be passed in this way. Also, because of my lack of knowledge, the only way that I know of to pass the code from a control to the database is to disable validation for the page the control is on. Without a doubt I do not want to do that.
So what are my options for getting blog posts into the database? Is it safest for me to fully create the post in html and update a copy of the database that resides on my local machine? If I do it this way, how can I merge the records from the database on the local machine with the records on the remote server?
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Jan 20, 2010
I've been searching for a tutorial or example on how to update my database when I change the text in the textbox that is in a DataList?
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May 5, 2012
Here is my .aspx page
<asp:Repeater ID="Repeater1" runat="server"> <HeaderTemplate> <tr bgcolor="maroon"> <th>
Subject Id </th> <th>
Subject Name </th> <th>
Obtained Marks </th> </tr>
</HeaderTemplate> <ItemTemplate>
[Code] .....
c# - code behind
protected void Page_Load(object sender, EventArgs e) {
if (!IsPostBack) {
this.PopulateRepeater();
} } private void PopulateRepeater() {
[Code] .....
Current repeater looks as...
Subject_Id Subject_Name Marks
s1(lable) subject1(lable) 56(textbox)
> Now, I want to make Updation with repeater (in same application).
I want to update Marks(into textboxes only, sub_id and name fatched from database dynamically) in each row of repeater.... how is it possible ??
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Mar 23, 2011
[Code]....
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Apr 8, 2010
i am facing some problem in update, edit and even create new data into my access database using data detail view. i am using microsoft visual web developer 2008, i can do the same when sql server database were to tore the data. but when i try to do the same using access database, an application error. may i know whats going wrong? and how to solve this problem?
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Jul 16, 2010
I am buliding the shopping cart appliCation in C#.I want to edit the quantity field in grid view in shopping cart for a product.How do I?
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Dec 10, 2010
How to Edit/Delete multiple records in MVC3 either by using JQuery or Razor syntax
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Feb 24, 2010
I've been developing a database system that stores test results from two different machines. (It's a foundry, each machine tests for the amounts of a collection of elements in a piece of metal. One machine does the tests on iron, the second on aluminium. Both produce the same list, but each machine will have much more of some elements than others.)
I used folder security to limit who has access to what folders, so there is a general page for anyone to view results from any machine in the root, one folder has a page to allow people in a particular group to edit/correct the iron results, and a second folder has a page to allow another group of people to edit/correct the aluminium results. Now, we've picked up a third machine which tests aluminium samples too, and it belongs to a third group of people. What is the best or recommended method to allow this third group to edit samples from the third machine only?
1) Should I have a third folder, and copy in the page from the other aluminium folder, and tweak it so it only shows and allows edits to results from this new machine? This seems like the quickest, easiest method, but a waste of effort as it's mostly duplication of existing work.
2) The other option I see is to keep one aluminium editing page, but to limit the results that are shown to the ones that the current user should be allowed to see. (One page which shows one group of people one half of the results, and shows a second group of people the other half of the results). Is there a way to achieve this that is almost as easy as using folder-based permissions?
3) Is there another way that I'm missing?
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Feb 26, 2011
i have edit problem...still i giving u a code of index that showing a records or multiple table how can i edit that record?
TaskManagerDataContext _Context = new TaskManagerDataContext();
[Authorize]
public ActionResult Index()
{
var userId = Guid.Parse(Membership.GetUser().ProviderUserKey.ToString());
TaskRepository getTask = new TaskRepository();
var taskInfo = getTask.GetByUser(userId).ToList();
return View(taskInfo);
}
// Class TaskRepositor
public List<TaskDetailModel> GetByUser(Guid userId)
{
var getTask = from taskData in _Context.Tasks
join projectData in _Context.Projects on taskData.ProjectId equals projectData.ProjectId
join typeData in _Context.TaskTypes on taskData.TaskTypeId equals typeData.TaskTypeId
join statusData in _Context.Status on taskData.StatusId equals statusData.StatusId
where taskData.UserId == userId
select TaskDetailModel.CreateModel(taskData.TaskId, projectData.ProjectName, taskData.TaskName, typeData.TaskType1, statusData.Status1);
return getTask.ToList();
}
//Class TaskDetail Model
public class TaskDetailModel
{
public static TaskDetailModel CreateModel(int id,string project, string desc, string taskType, string status)
{
return new TaskDetailModel
{
Id = id,
Description = desc,
Project = project,
Type = taskType,
Status = status,
Date = System.DateTime.Now.ToString()
};
}
public int Id { set; get; }
public string Description { set; get; }
public string Project { set; get; }
public string Type { set; get; }
public string Status { set; get; }
public string Date { set; get; }
}
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