自定义 Datagridview 分页答案

【问题标题】：Custom Datagridview Paging自定义 Datagridview 分页
【发布时间】：2021-02-23 13:41:50
【问题描述】：

我正在尝试进行 Datagridview 分页，我已经执行了分页并且工作正常，问题是当我尝试从数据库中搜索记录时，问题是 Datagridview 没有更改并且从数据库未显示，每次搜索的页数不断增加。

请观看此视频： https://www.youtube.com/watch?v=Ina0OlZagSo&ab_channel=RabeeQabaha

这是我的自定义 Datagridview 类：

class GV_Paging : Guna.UI2.WinForms.Guna2DataGridView
{
    public int PageSize
    {
        get
        {
            return _pageSize;
        }
        set
        {
            _pageSize = value;
        }
    }

    public int _pageSize = 10;
    BindingSource bs = new BindingSource();
    BindingList<DataTable> tables = new BindingList<DataTable>();
    public void SetPagedDataSource(DataTable dataTable, BindingNavigator bnav)
    {
        DataTable dt = null;
        int counter = 1;
        foreach (DataRow dr in dataTable.Rows)
        {
            if (counter == 1)
            {
                dt = dataTable.Clone();
                tables.Add(dt);
            }
            dt.Rows.Add(dr.ItemArray);
            if (PageSize < ++counter)
            {
                counter = 1;
            }
        }
        bnav.BindingSource = bs;
        bs.DataSource = tables;
        bs.PositionChanged += Bs_PositionChanged;
        Bs_PositionChanged(bs, EventArgs.Empty);
    }
    void Bs_PositionChanged(object sender, EventArgs e)
    {
        this.DataSource = tables[bs.Position];
    }
}

这就是我将数据填充到 Datagridview 的方式：

 GV.PageSize = Convert.ToInt32(Math.Floor(Convert.ToDecimal(GV.Height / GV.RowTemplate.Height))) - 1;
 DT = DBConn.ExecuteDataTable("select_all_materials", CommandType.StoredProcedure);
 GV.SetPagedDataSource(DT, bindingNavigator1);

这是从数据库中搜索数据的代码（处理文本框文本更改）：

 GV.PageSize = Convert.ToInt32(Math.Floor(Convert.ToDecimal(GV.Height / GV.RowTemplate.Height))) - 1;
 DT = DBConn.ExecuteDataTable("search_materials_by_name", CommandType.StoredProcedure, new 
 SqlParameter[] { new SqlParameter("@name", Material_name_txt.Text.Trim()) });
 GV.SetPagedDataSource(DT, bindingNavigator1);

【问题讨论】：

标签： c# winforms datagridview paging

【解决方案1】：

在处理之后我能够解决问题，这里是工人阶级：

public int PageSize
{
    get
    {
        return _pageSize;
    }
    set
    {
        _pageSize = value;
    }
}
public int _pageSize = 10;
BindingSource bs;//= new BindingSource();
BindingList<DataTable> tables;// = new BindingList<DataTable>();
public void SetPagedDataSource(DataTable dataTable, BindingNavigator bnav)
{
    if (dataTable == null || bnav == null)
    {
        return;
    }

    DataTable dt = null;
    bs = new BindingSource();
    tables = new BindingList<DataTable>();
    int counter = 1;

    foreach (DataRow dr in dataTable.Rows)
    {
        if (counter == 1)
        {
            dt = dataTable.Clone();
            tables.Add(dt);
        }

        dt.Rows.Add(dr.ItemArray);
        if (PageSize < ++counter)
        {
            counter = 1;
        }
    }
    bnav.BindingSource = bs;
    bs.DataSource = tables;
    bs.PositionChanged += Bs_PositionChanged;
    Bs_PositionChanged(bs, EventArgs.Empty);
}
void Bs_PositionChanged(object sender, EventArgs e)
{
    try
    {
        this.DataSource = tables[bs.Position];
    }
    catch (Exception ex)
    {

        MessageBox.Show(ex.Message);
    }
}

【讨论】：