Question

我知道在SOF中已经多次询问了此问题，但是我向您保证，我尝试了诸如.refresh，.update，在插入后调用该方法之类的所有操作，但是仍然没有任何反应，我只需要再次刷新我的用户控件即可datagridview中的新数据更改。我正在使用存储过程在datagridview上显示数据，也可以进行插入，更新等操作。我希望有人能够帮助我指出我做错了什么或错过了什么。谢谢

这是我的课程，用于在datagridview上显示数据

public static class Display 
{
    public static void Display_Customer(DataTable dt, DataGridView dgv)
    {     
        using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["SalesInventoryManagement.Properties.Settings.Setting"].ConnectionString))
        {
            using (var cmd = new SqlCommand("usp_GetCustomers", con))
            {               
                con.Open();
                cmd.CommandType = CommandType.StoredProcedure;
                using (var sda = new SqlDataAdapter(cmd))
                {
                    sda.Fill(dt);
                    var bsource = new BindingSource();
                    bsource.DataSource = dt;
                    dgv.DataSource = bsource;
                    sda.Update(dt);
                }
                con.Close();    
            }
        }
    } 
}

这是我的用户控件，其中有诸如datagridview，button等之类的控件

 public partial class ManageCustomer : UserControl
{
    public ManageCustomer()
    {
        InitializeComponent();
    }
    public DataTable dt = new DataTable();
    private void ManageCustomer_Load(object sender, EventArgs e)
    {
        Display.Display_Customer(dt, CustomersList);   
        Customization._DGVWidth(CustomersList);
    }
    private void CustomersList_SelectionChanged(object sender, EventArgs e)
    {
        Register.CustomerSelection(CustomersList, lbl_id, lbl_name, lbl_gender, 
        lbl_contact,lbl_email, lbl_address, PreviewImage);      
    }
    private void Btn_Update_Click(object sender, EventArgs e)
    {
        var uc = new UpdateCustomer(this).ShowDialog();
    }
    private void CustomersList_RowEnter(object sender, DataGridViewCellEventArgs e)
    {
        if (e.RowIndex >= 0)
        {
            DataGridViewRow row = CustomersList.Rows[e.RowIndex];
            Variables.ID = row.Cells["Customer ID"].Value.ToString();
        }
    }

}

这是一个表单，该表单基于ID从datagridview获取数据 PS：Btn_Update向我的用户控件显示新表单

public partial class UpdateCustomer : Form
{
    ManageCustomer _view;
    public UpdateCustomer(ManageCustomer view)
    {
        InitializeComponent();
        UpdateC.CustomerInformation(Variables.ID, lbl_path, PreviewImage, txt_name, txt_contact, txt_email, txt_address);
        this._view = view;
    }
    private void btn_update_Click(object sender, EventArgs e)
    {
        using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["SalesInventoryManagement.Properties.Settings.Setting"].ConnectionString))
        {
            UpdateC._Update(lbl_path.Text, txt_name.Text, txt_contact.Text, txt_email.Text, txt_address.Text);
            Display.Display_Customer(_view.dt, _view.CustomersList);
        }
    }
}

最后，这是我存储的过程

USE [SalesInventory]
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[usp_GetCustomers]

AS
BEGIN
SET NOCOUNT ON; 
                SELECT   CustomerID as 'Customer ID', Images, Full_Name, Gender, Contact_Number as 'Contact Number', Email, Home_Address as 'Address'
                FROM Customer_List      
END

Answer 1

我玩弄了您发布的代码，并设法使GridView刷新而不必重新加载。

请如下更改显示类别

    public static void Display_Customer3(DataGridView dgv)
    {
        using (var con = new SqlConnection(ConfigurationManager.ConnectionStrings["SalesInventoryManagement.Properties.Settings.Setting"].ConnectionString))
        {
            using (var cmd = new SqlCommand("usp_GetCustomers", con))
            {
                con.Open();
                cmd.CommandType = CommandType.StoredProcedure;
                using (var sda = new SqlDataAdapter(cmd))
                {
                    DataTable dt = new DataTable();     // Initiate the datatable here to avoid getting duplicate data during 'sda.Fill(dt)'
                    sda.Fill(dt);
                    var bsource = new BindingSource();
                    bsource.DataSource = dt;
                    dgv.DataSource = bsource;
                    //sda.Update(dt);
                }
                con.Close();
            }
        }
    }

更新其中适当引用了Display.Display_Customer的其余代码。

Display.Display_Customer(CustomersList);

或

Display.Display_Customer(_view.CustomersList);

通过上述更改，我设法在更新时刷新DataGridView。

更新以启用DataGridView搜索：

由于BindingSourse用作数据源，因此可以利用BindingSourse.Filter启用搜索。如下更新搜索文本框；

BindingSource dgBS = (BindingSource)CustomersList.DataSource;
dgBS.Filter = string.Format("FileName LIKE '%{0}%'", txtFilter_FileName.Text);

插入/更新后立即在datagridview中显示数据

1 个答案: