I have a program in C#.net. There is a datagridview which shows all the details of the student. Then I add a column to update another column using the value I entered. Means I want to add roll no to student details table while running. I want the code to update it. Is it possible?
I am receiving error: "unable to open database file" using sqlite3_open function. I am using sqlite3.c (included amalgamation files). It happens only during ARM compiling/run. If I do the same at x86 compile/run everything works fine...
is there a way to tell WPF that I'm going to do a lengthy update on a control (TextBlock), and that it shouldn't redraw it until I tell it I'm done? I'm adding a large number of items to the Inlines property, and it has to redraw the entire control every time I add an item, which takes a very long time - about 1 second for every 100 items. I know some other frameworks allow freezing of certain controls, but I haven't been able to find anything in the documentation or on google. I've tried collapsing the TextBlock, and then making it visible again after the update, but it did not improve the performance at all.
I am doing a remake of the classic game: Frogger. Currently, I have the world set up, the frog moves about in the world how I want it to, but I cannot get the cars or the logs to move simultaneously with the frog. I have posted my source code on GitHub.
I have a label on my main form. When I menu select my settings form, I make a change to the label text on the main form but the label text does not update with the new text.
So here is my code in my settings form:
MainForm frm = new MainForm(); frm.paintMainFormThemeTitle(logoText); // updates the main form label
I may not fully understand the new instantiate key word, but doesn't this create another, new copy of my main form to operate on? And isn't that why I can't see my label text change on my main form that is previously in view?
All of the examples that I have been able to find show using this new key word to be able to access a component on another form. But to my understanding, I'm creating another, new form.
I am currently just trying to update a record in a SQL database.I can add a record and delete a record just fine but when I go to update I get no errors but it just doesn't update.
Here is what I have and done coding for hours trial and error
private void btnAddProd_Click(object sender, RoutedEventArgs e) {//validate method // product = new Product(txtProductName.Text, Convert.ToDecimal(txtProductCost.Text), txtProductType.Text); product = new Product(); MakeProduct(product); if(modify) { Product theOneAndOnly = new Product();
Ive got a football league program that I made to handle 10 teams. Ive got the 10 teams and it displays the league with 0 for played, won, drawn, lost and points but im having trouble actually adding matches to this? How do i add matches and update the team struct?
i have given a project for currency conversion program with add,delete,search,display option. but i was thinking if it can update the currency rate from internet at beginning.
Im trying to make a Tic Tac Toe board for an assignment. Right now it compiles fine but when I enter an x or o it does not update the board it just prints out the '.'s that the board is initialized to. Also, when I get to player 2 the board will printout twice so its 6 rows or 3 columns. The project uses a main to ask who starts then goes to a play function that asks for inputs and calls the makeMove function to place the x's and o's and the print function to display the updated board.
bool Board::makeMove(int rowIn, int columnIn, char currentPlayer) { if (playBoard[rowIn][columnIn] == '.') { playBoard[rowIn][columnIn] = currentPlayer; return true;
I have the following code. I am able to call data from my database and print the result onto datagridview. However, if I happen to edit some data through datagridview, I would like it to save the changes by clicking a save button. I do not know how to connect callDBButton_Click and saveButton_Click...I know how to update the changes if I just put adapter.Update(dataTable); at the end of the callDBButton_Click method...but I want to it only save changes when I CLICK the "Save" Button.
In my project i need to update the attn_dateTimeOut in database.After i updated it will automatic delete the specific row record that had been updated. I had two question:
1) in my database there are a few table is assign not null."attn_dateTimeOut" is a table that haven insert any record. When i update it using below code,it work and can update but it comes out error.Error show "record cannot be null".
2) I want t make it when i updated the "attn_dateTimeOut",it will auto delete the row of updated record.I do usign back code "DeleteRecord" but it nothing change!How should i do?
Here my code:
private void txt_proximity_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == (char)13) { TMPB_attn row_TMPN_attn = BusinessLogicLayer.TMS_GET_PROXIMITY_VALID_TO_USE(txt_proximity.Text); if (!String.IsNullOrEmpty(txt_proximity.Text)) {
a user can edit quantity ie productID 1 has quantity 10, and ProductID 2 has quantity 3, it should update once clicked update button. however i must highlight both rows to do it so if i leave the selected cell on product id 3 it will upate only that row. is there a way to update the rows that have been changed when not highlighted.
for (int i = 0; i < dataGridView1.SelectedCells.Count; i++) { int selectedrowindex = dataGridView1.SelectedCells[i].RowIndex; DataGridViewRow selectedRow = dataGridView1.Rows[selectedrowindex]; string a = Convert.ToString(selectedRow.Cells["Quantity"].Value); string b = Convert.ToString(selectedRow.Cells["ProductID"].Value); //update to database..... }
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data;
[Code]....
I have driver table this is my fields as following DriverID INT DriverName nvarchar50 Nationality nvarchar50 Address nvarchar50 I have form driver have 4 texbox textbox1 DriverID textbox2 DriverName textbox3 Nationality textbox4 address this table have two records
when i press buton next (NextBtn_Click)to go third record it not accept I need next button increase by 1 if record not exist and update this in table How i do this example if i have two records
1 aln american newyork 2 adam british british
when i press next button it ok work in records exist but when i press next button to third record it not accept why what i need is when press next after 2 it come 3 in text box driver id and update this number in table
I am trying to create an application interface serial data reception using c #. I send the data from the serial adc microcontroller adc atmega 16 ... the data is 0 to 1023. In the textbox that I use as a data reception, data updates to the bottom if I use ReadLine coding.
examples: 1023 1023 1023 256 669
If I use ReadExisting, the data displayed by the textbox moves to the side. examples 102310231023256669
When the data changes from 0-1023 of serial communication, and clear the data will store in otomatiis in the textbox.
When there is reception of data with a value of 1023 and immediately there is a change to the value of 555 textbox value will not store the value of 1023, I want the value in 1023 immediately deleted automatically and change the value to 555 when a change in the value of the data ...
The following is the complete source code:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace serial { public partial class Form1 : Form {
It's my understanding that there are three ways to go about updating a control on a form from a class.
A) Instance the form, eg: Form1 Frm = new Form1(); The problems I have run into with this is that while writing text to a richtextbox using the instance Frm, the richtextbox never updates on the form.
B) Passing the object to the class. This method seems less used and can be very problematic. Haven't looked into it thoroughly.
C) Exposing the objects using classes within the Form. While making methods public they still do now show as available for use when calling from classes, unless I instance them but then I run into problem A. I've considered making the methods static so no instancing is required but when doing so the object(in this case richtextbox) becomes invalid due to itself being instanced by the automatically generated code when adding the object.
I know there is another way to pass values then force the object to update but that won't necessarily work with a richtextbox as you have the option to deal with color and font variations.
I imagine I'm missing something pretty simple here but I can't find any resources online about how to handle objects with more complex data than just straight text.
Example of problem A
//called from a class Form1 Chat = new Form1(); Chat.BeginChat(); Chat.AddChat(Color.Lime, "Testing"); Chat.EndChat();
I retrieve all the row values from database into text box.But I could not Update it.It shows error message is : The variable name '@value' has already been declared. Variable names must be unique within a query batch or stored procedure. Must declare the scalar variable "@keyValue".
my code is here:
public partial class ECB_ECBConfiguration : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { DataTable dt = ECBDal.GetECBConfiguration(); foreach(DataColumn col in dt.Columns)
