Tag: gridview

C#’s DataGridView data control (direct access to SQL vs access to SQL through EF entity model)

Table of Contents 1. Display data in the DataGridView control 1. Direct programmatic access to SQL (1) Source code (2) Generate effect 2. Access SQL through EF entity model (1) Source code (2) Generate effect 2. Get the current cell in the DataGridView control 1. Direct programmatic access to SQL (1) Source code (2) Generating […]

[Transfer] [C#] Hosting controls in Windows Forms DataGridView cells

using System; using System.Windows.Forms; public class CalendarColumn : DataGridViewColumn { public CalendarColumn() : base(new CalendarCell()) { } public override DataGridViewCell CellTemplate { get { return base.CellTemplate; } set { // Ensure that the cell used for the template is a CalendarCell. if (value != null & amp; & amp; !value.GetType().IsAssignableFrom(typeof(CalendarCell))) { throw new InvalidCastException(“Must be […]

C# implements saving data in DataGridView to CSV and Excel

1. Save to CSV public static bool dataGridViewToCSV(DataGridView dataGridView) { if (dataGridView.Rows.Count == 0) { MessageBox.Show(“No data to export!”, “Prompt”, MessageBoxButtons.OK, MessageBoxIcon.Information); return false; } SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.Filter = “CSV files (*.csv)|*.csv”; saveFileDialog.FilterIndex = 0; saveFileDialog.RestoreDirectory = true; saveFileDialog.CreatePrompt = true; saveFileDialog.FileName = null; saveFileDialog.Title = “save”; if (saveFileDialog.ShowDialog() == DialogResult.OK) { […]

DataGridView bound data update

1. Create data class using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DataGridViewTest {<!– –> internal class UserData {<!– –> public string Name {<!– –> get; set; } public int Weight {<!– –> get; set; } public int Height {<!– –> get; set; } } } 2. DataGridView data operations using System; […]

C# – DataGridView control for table development

1. Summary Using the DataGridView control, you can display and edit tabular data from many different types of data sources. The DataGridView control provides a customizable table for displaying data. The DataGridView class allows customization of cells, rows, columns, and borders by using properties such as DefaultCellStyle, ColumnHeadersDefaultCellStyle, CellBorderStyle, and GridColor. With or without data […]

c# import excel data into gridview and continue to add rows when there is data

Runtime: Import data and bind the data source. A new row is added, and the previously maintained data will not be refreshed. When the imported excel format is different from the gridview format, a column will be automatically added: gridview.AutoGenerateColumns = true; Does not automatically add a column: gridview.AutoGenerateColumns = false; Code private void btnmuban_Click(object […]

GridView usage in Android studio

Directory Rendering: ![Insert picture description here](https://img-blog.csdnimg.cn/86e4a48a71164dec82613d58b1fbaa1c.jpeg) Code: Rendering: Code: UserGridviewAdapter package com.example.gridviewpro.Adapter; import android.content.Context; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import com.example.gridviewpro.R; import com.example.gridviewpro.bean.UserGridviewBean; import java.util.List; public class UserGridviewAdapter extends BaseAdapter {<!– –> private Context mContext; private List<UserGridviewBean> mUserGridviewBeanList; public UserGridviewAdapter(Context context, List<UserGridviewBean> userGridviewBeanList) {<!– –> mContext = context; mUserGridviewBeanList = […]

VerticalGridView developed by Android TV

Android TV application development is the same as mobile application development, except for the addition of focus control, that is, the color changes when selected. androidx.leanback.widget.VerticalGridView inherits BaseGridView, and BaseGridView inherits RecyclerView. So VerticalGridView is RecyclerView, and its usage is the same as RecyclerView. Since it’s the same, wouldn’t it be enough to just use […]