datagridview

问题 I asked a question previously concerning updating data in a datagridview with phpMyAdmin. You can refer to it by following link -->Updating data in phpmyadmin part 1 The code works quite OK, but now the problem is that when I check for the updated data in localhost all I see are empty fields. Below is the screenshot of my vb in design. I have labelled the textboxes as per my database. The textboxes in the screenshot are set to be invisible on running my winform. What exactly could be the

问题 I have added button to datagrid view but when ever the function is called more than once then new button adds I need to stop this addition void AddtoGrid() { try { table = new DataTable(); bcol = new DataGridViewButtonColumn(); bcol.HeaderText = "Action "; bcol.Text = "Delete"; bcol.Name = "deleteUserButton"; bcol.UseColumnTextForButtonValue = true; table.Columns.Add("Name"); table.Columns.Add("Type"); table.Columns.Add("Status"); table.Columns.Add("Date Created"); table.Columns.Add("Action")

问题 The following code is used for adding decimal point after 5 digits in DataGridView cell and to set cursor positions to last, but this code work only for the first DataGridView cell. Thanks in advance. Grid EditingControlShowing event code: private void grdCharges_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) { DataGridView grd = sender as DataGridView; e.Control.KeyPress -= new KeyPressEventHandler(grdCharges_row0_Column2_KeyPress); e.Control.KeyPress -=

问题 I want a button that creates a datatable to then bulk copy to a SQL database. I have been able to merge datatables starting with a datatable created from the SQL table, but I have not been able to just make a datatable from scratch. Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click Dim table As New DataTable Dim row As DataRow Dim TableName As String = "SQLLocation_" table.Columns.Add(TableName & "Number", GetType(Int64)) table.Columns

问题 I want to add an extra cell to each column created where its value is from the cells in each row. I have this code but doesn't work: i = 0; Double X1 = Convert.ToDouble(DGV_Points.Rows[i].Cells[6].Value); Double X2 = Convert.ToDouble(DGV_Points.Rows[i++].Cells[6].Value); Double LapLength = X1 - X1; this.DGV_Points.Rows.Add(); this.DGV_Points.Rows[0].Cells[1].Value = LapLength; this.DGV_Points.Rows[1].Cells[1].Value = LapLength; I have also tried this exaample: foreach (var item in _model

问题 I am trying to force DataGrid to refresh its content on a form closing event. I have tried various methods, searched this forum for answers but still I am unable to find a solution. This is how my DataGridView is being populated : string strCon = ConfigurationManager.ConnectionStrings["ST"].ConnectionString.ToString(); string strSQL = "SQL QUERY"; SqlDataAdapter dataAdapter = new SqlDataAdapter(strSQL, strCon); SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter); DataTable

问题 I want to add a new item into my datagridview. I know can achieve this using several TextBoxes and a Button. When the user clicks this button, it will add a new item into database and refresh my datagridview. I wonder if I can use the last row of my datagridview to add a new item. How can I do that? 回答1: did you use the RAD-Databind (DataSource on your winforms)? If so it might be a bit tricky. You should load the data in a seperate layer (not in the code-behind if you can help it). Then it

问题 Hi I have been banging my head against the wall all day trying to figure this out. I have a DataGridView that is displaying the results of an SQL Query The query returns 3 fields: GROUPNUM, GROUPNAME, COACHING The group fields just have strings in them and they are displaying fine, but the COACHING field is a single character field that will either have a Y or an N in it. For that column I want to have a combobox with Y or N as the items. Here is what I have so far. dtGroups is a data table

问题 I have a tab delimited file that I want to load in a DataGridView (DGV); for that, I'm using the following code: DataTable dt = new DataTable(); using (FileStream stream = File.OpenRead("logs.txt")) { using (StreamReader reader = new StreamReader(stream)) { string line = reader.ReadLine(); while (line != null) { string[] items = line.Split('\t'); line = reader.ReadLine(); if (dt.Columns.Count == 0) { for (int i = 0; i < items.Length; i++) { dt.Columns.Add("Column " + i); } } dt.Rows.Add(items

问题 I want to do search button in DataGridView. I read my data with this code: private void button1_Click_1(object sender, EventArgs e) { FileStream f1 = new FileStream("zapis.dat", FileMode.Open); BinaryReader br = new BinaryReader(f1); int а = 0; while (f1.Position < f1.Length) { string data = br.ReadString(); string sing = br.ReadString(); string avtor = br.ReadString(); string zagl = br.ReadString(); string janr = br.ReadString(); string ezik = br.ReadString(); dataGridView1.Rows.Add(++а,