Question

我在DataGridView中有信息，我正在寻找快速过滤它的方法。

我希望它对UI中的用户很好。所以我使用TableLayoutPanel来存储和过滤文本框，我希望这个相关列与DataGridView的列大小相同。

但是在下一次运行时，dataTableProjects列表中有6个元素它需要大约300毫秒...我不知道为什么......

Stopwatch stopwatch = Stopwatch.StartNew();
dataGridViewProject.DataSource = dataTableProjectsFiltered;
stopwatch.Stop();

表单代码：

using ExtentionMethods;
using PulserEditor.classes;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PulserEditor
{
    public partial class Form2 : Form
    {
        private BindingList<ProjectDataGridView> dataTableProjects;
        private BindingList<ProjectDataGridView> dataTableProjectsFiltered;

        public Form2()
        {
            InitializeComponent();
            UpdateProjectsGrid();
            tableLayoutPanelCatalogs.ColumnStyles[0].Width = dataGridViewProject.RowHeadersWidth;
            dataGridViewProject.ColumnWidthChanged += dataGridViewProject_ColumnWidthChanged;
        }
        private void UpdateProjectsGrid()
        {
            dataTableProjects = PulserEditorDataBaseManager.GetProjects();
            dataTableProjectsFiltered = new BindingList<ProjectDataGridView>(dataTableProjects.ToList());

            dataGridViewProject.DataSource = dataTableProjectsFiltered;

        }
        private void textBoxFilterCatalogByDescription_TextChanged(object sender, EventArgs e)
        {
            FilterProjects();
        }

        private void textBoxFilterCatalogByCatalogNumber_TextChanged(object sender, EventArgs e)
        {
            FilterProjects();
        }

        private void textBoxFilterCatalogByCellCode_TextChanged(object sender, EventArgs e)
        {
            FilterProjects();
        }
        private void FilterProjects()
        {
            if (dataTableProjects != null)
            {
                dataTableProjectsFiltered = new BindingList<ProjectDataGridView>(dataTableProjects.Where(
                            p => p.Teur_Project.ContainsConsts(textBoxFilterCatalogByDescription.Text) &&
                            p.Code_Project.ContainsConsts(textBoxFilterCatalogByCatalogNumber.Text) &&
                            p.Code_age_cell.ContainsConsts(textBoxFilterCatalogByCellCode.Text)).ToList());
                dataGridViewProject.ColumnWidthChanged -= dataGridViewProject_ColumnWidthChanged;
                Stopwatch stopwatch = Stopwatch.StartNew();
                dataGridViewProject.DataSource = dataTableProjectsFiltered;
                stopwatch.Stop();
                dataGridViewProject.ColumnWidthChanged += dataGridViewProject_ColumnWidthChanged;         
            }
        }

        private void dataGridViewProject_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
        {
            tableLayoutPanelCatalogs.ColumnStyles[e.Column.Index + 1].Width = e.Column.Width;
        }
    }
}

扩展方法

public static bool CompareConsts(this string str, string other)
    {
        return str.Trim().ToLower().Equals(other.Trim().ToLower());
    }

    public static bool ContainsConsts(this string str, string other)
    {
        return str.Trim().ToLower().Contains(other.Trim().ToLower());
    }

来自数据库的电话......

public static BindingList<ProjectDataGridView> GetProjects() {
    BindingList<ProjectDataGridView> projectList = new BindingList<ProjectDataGridView>();
    try
    {
        using (SqlConnection openCon = new SqlConnection(connectionString))
        {

            string saveStaff = "select [Teur_Project],[Project].[Code_Project],[Code_age_cell]," +
                "[Current],[time],[Cells_in_Parallel],[Cells_in_Series],[dADocv_min],[dAdccv_min]," +
                "[dADocv_max],[dAdccv_max],[Current_qc],[Time_QC],[dADocv_QC],[dAdccv_QC],[Department] " +
                     "from(Select[Code_Project], MAX([Change]) as maxDate " +
                     "from [Project] " +
                     "group by [Code_Project]) as MaxTbl, [Project] " +
                     "where MaxTbl.[maxDate] = [Project].[Change] and [Active]=@active";
            SqlCommand command = new SqlCommand(saveStaff, openCon);
            command.Parameters.AddWithValue("active", true);
            openCon.Open();
            SqlDataReader dr = command.ExecuteReader();

            while (dr.Read())
            {
                projectList.Add(new ProjectDataGridView(dr.GetString(0).Trim(), dr.GetString(1).Trim(), 
                    dr.GetString(2).Trim(),dr.GetInt64(3), dr.GetInt64(4), dr.GetInt32(5), dr.GetInt32(6), 
                    dr.GetDouble(7), dr.GetDouble(8),dr.GetDouble(9), dr.GetDouble(10), dr.GetInt64(11),
                    dr.GetInt64(12), dr.GetDouble(13),dr.GetDouble(14),dr.GetInt32(15)));
            }
            openCon.Close();
            return projectList;
        }
    }
    catch (Exception ex)
    {
        WriteLog(ex.StackTrace, ex.Message);
    }
    return null;
}

从DataGridView过滤文本运行速度非常慢

0 个答案: