数据网格视图未以win表单c#显示更新的数据？

Question

好的，所以我有这个通过数据源连接到数据库的datagridview，这很好，但是当我从表单在表中添加另一行时，当我返回到具有datagridview的表单时它只有显示以前的值，而不是新添加的值。

即使在我重新启动/重新运行应用程序之后。它继续发生。

顺便说一句，我通过此链接使用自动筛选功能 AutoFilter in DataGridView

这是 .cs 文件：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using DataGridViewAutoFilter;

namespace Call_Logger
{
public partial class AutoFilter : Form
{
    public AutoFilter()
    {
        InitializeComponent();

    }

    private void AutoFilter_Load(object sender, EventArgs e)
    {
        // TODO: This line of code loads data into the    'datasetFilter.LogCall' table. You can move, or remove it, as needed.

       this.logCallTableAdapter.Fill(this.datasetFilter.LogCall);

    }

    private void showAllLabel_Click(object sender, EventArgs e)
    {
        DataGridViewAutoFilterTextBoxColumn.RemoveFilter(dataGridView1);
    }

    private void dataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
    {

        String filterStatus = DataGridViewAutoFilterColumnHeaderCell.GetFilterStatus(dataGridView1);
        if (String.IsNullOrEmpty(filterStatus))
        {
            showAllLabel.Visible = false;
            filterStatusLabel.Visible = false;
        }
        else
        {
            showAllLabel.Visible = true;
            filterStatusLabel.Visible = true;
            filterStatusLabel.Text = filterStatus;
        }

    }

    private void button1_Click(object sender, EventArgs e)
    {
         dataGridView1.DataSource = null;
        dataGridView1.DataSource = logCallBindingSource; 
    }


}
}

这是执行添加功能的表单

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Call_Logger
{
public partial class AddingFunctionality : Form
{
    private OleDbConnection con = new OleDbConnection();
    public AddingFunctionality()
    {
        InitializeComponent();
        con.ConnectionString = ConfigurationManager.ConnectionStrings["Connection"].ToString();
    }

    private void btn_Save_Click(object sender, EventArgs e)
    {



        if (comboCallLogBy.Text == "")
        {
            comboCallLogBy.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the person who is logging the call is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboCallLogBy.Focus();
            return;
        }

        if (comboCallType.Text == "")
        {
            comboCallType.BackColor = Color.LightSalmon;
            MessageBox.Show("Specification of the type of call is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboCallType.Focus();
            return;
        }

        if (comboCallLocation.Text == "")
        {
            comboCallLocation.BackColor = Color.LightSalmon;
            MessageBox.Show("Location of the call is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboCallLocation.Focus();
            return;
        }

        if (txtIncidentNumber.Text == "")
        {
            txtIncidentNumber.BackColor = Color.LightSalmon;
            MessageBox.Show("Please enter the incident number", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            txtIncidentNumber.Focus();
            return;
        }
        else {
            decimal OutNumber;
            if (!decimal.TryParse(txtIncidentNumber.Text, out OutNumber))
            {
                txtIncidentNumber.BackColor = Color.LightSalmon;
                MessageBox.Show("Value for Incident number should be numerical", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
                txtIncidentNumber.Focus();
                return;

            }

        }

        if (comboCaller.Text == "")
        {
            comboCaller.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the caller is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboCaller.Focus();
            return;
        }

        if (comboCallFor.Text == "")
        {
            comboCallFor.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of person the call is made for is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboCallFor.Focus();
            return;
        }

        if (comboAssignedBy.Text == "")
        {
            comboAssignedBy.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the person assigning call is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboAssignedBy.Focus();
            return;
        }

        if (comboForwardTo.Text == "")
        {
            comboForwardTo.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the person call is forwarded to is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboForwardTo.Focus();
            return;
        }

        if (comboContactPerson.Text == "")
        {
            comboContactPerson.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the person contacting is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboContactPerson.Focus();
            return;
        }

        if (comboClosedBy.Text == "")
        {
            comboClosedBy.BackColor = Color.LightSalmon;
            MessageBox.Show("Name of the person call closed by is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboClosedBy.Focus();
            return;
        }

        if (comboStatus.Text == "")
        {
            comboStatus.BackColor = Color.LightSalmon;
            MessageBox.Show("Status of the call is required", "Validation Error", MessageBoxButtons.OK, MessageBoxIcon.Information);
            comboStatus.Focus();
            return;
        }
        try
        {

            con.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = con;
            command.CommandText = ("insert into LogCall (CallLogBy, CallLogDate, CallLogTime, CallType, CallLocation, ProblemDescription1, ProblemDescription2, IncidentNo, Caller, CallFor, AssignedBy, AssignedDate, AssignedTime, ForwardTo, ContactPerson, ForwardDate, ForwardTime, ActionTaken1, ActionTaken2, NextStep1, NextStep2, ClosedBy, CloseDate, CloseTime, Remarks1, Remarks2, Status) values ('" + comboCallLogBy.Text + "','" + dateTimePicker1.Text + "','" + dateTimePicker2.Text + "','" + comboCallType.Text + "','" + comboCallLocation.Text + "','"+ textBox1.Text + "','" + textBox2.Text + "','" + txtIncidentNumber.Text + "','" + comboCaller.Text + "','" + comboCallFor.Text + "','" + comboAssignedBy.Text + "','" + dateTimePicker3.Text + "','" + dateTimePicker4.Text + "','" + comboForwardTo.Text + "','" + comboContactPerson.Text + "','" + dateTimePicker5.Text + "','" + dateTimePicker6.Text + "','" + textBox4.Text + "','" + textBox5.Text + "','" + textBox6.Text + "','" + textBox7.Text + "','" + comboClosedBy.Text + "','" + dateTimePicker7.Text + "','" + dateTimePicker8.Text + "','" + textBox8.Text + "','" + textBox9.Text + "','" + comboStatus.Text + "')");
            command.ExecuteNonQuery();

            MessageBox.Show("Data saved successfully", "Record Added", MessageBoxButtons.OK, MessageBoxIcon.Information);
            con.Dispose();
            this.Hide();
            Dashboard dboard = new Dashboard();
            dboard.ShowDialog();
            con.Close();
        }

        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex);
            con.Close();
        }




    }

    private void AddingFunctionality_Load(object sender, EventArgs e)
    {
        try
        {
            con.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = con;
            string query = "select * from MiscData";
            //string query1 = "select * from Try";
            command.CommandText = query;
            //command.CommandText = query1;

            OleDbDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {
                comboCallLogBy.Items.Add(reader["CallLoggedBy"].ToString());
                //comboCallType.Items.Add(reader["CallType"].ToString());
                //comboCallLocation.Items.Add(reader["CallLocation"].ToString());
                comboCaller.Items.Add(reader["Employees"].ToString());
                comboCallFor.Items.Add(reader["Employees"].ToString());
                comboAssignedBy.Items.Add(reader["Employees"].ToString());
                comboForwardTo.Items.Add(reader["Employees"].ToString());
                comboContactPerson.Items.Add(reader["Employees"].ToString());
                comboClosedBy.Items.Add(reader["Employees"].ToString());
                //comboStatus.Items.Add(reader["Status"].ToString());

            }
            con.Close();

        }

        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex);

        }

        try
        {
            con.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = con;
            string query = "select * from CallType";

            command.CommandText = query;


            OleDbDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {

                comboCallType.Items.Add(reader["CallingType"].ToString()+ " " + reader["CallDesc"].ToString());

            }
            con.Close();

        }

        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex);

        }

        try
        {
            con.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = con;
            string query = "select * from Location";

            command.CommandText = query;


            OleDbDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {

                comboCallLocation.Items.Add(reader["LocationType"].ToString() + " " + reader["Description"].ToString());

            }
            con.Close();

        }

        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex);

        }


        try
        {
            con.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = con;
            string query = "select * from Status";

            command.CommandText = query;


            OleDbDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {

                comboStatus.Items.Add(reader["StatusType"].ToString() + " " + reader["Description"].ToString());

            }
            con.Close();

        }

        catch (Exception ex)
        {
            MessageBox.Show("Error " + ex);

        }



    }

    private void button1_Click(object sender, EventArgs e)
    {
        this.Hide();
        Dashboard Add = new Dashboard();
        Add.ShowDialog();
    }








}
}

Answer 1

DataGridView.Refresh 和 DataGridView.Update 是从 Control 继承的方法。所以有工作与重绘控件有关，这就是为什么不出现新行的原因。

您需要将数据重新绑定到DataGridView，如下所示：

private void button1_Click(object sender, EventArgs e)
{
    dataGridView1.DataSource = null;
    dataGridView1.DataSource = dtData; //add you data here
}