Question

经过大量的搜索，我来这里寻求帮助。在我的 C＃winform应用程序中，我想创建一个 dataGridview 来加载一些记录，用户在数据库中执行搜索后，一旦用户点击行，它应该显示文本框中的所有记录。

我有超过20个texbox和几个组合框和datetimepicker，但我只想在dataGridView中显示几列。

我知道如何在表单加载或搜索时将数据加载到gridview或在行上单击选择所有gridview列到文本框但我仍然坚持这一点。谢谢。

Answer 1

不确定我是否得到了你想要的东西但是，你正在使用datagridview的数据源来绑定结果，对吗？如果是这样，在您选择数据后，您可以隐藏您不想显示的列，如下所示：

DataGridView dgv = new DataGridView();
dgv.DataSource = YourDataTable;
// hide the columns you dont want on grid
dgv.Columns[0].Visible = false;
dgv.Columns[2].Visible = false;
dgv.Columns[3].Visible = false;
dgv.Columns[4].Visible = false;

这样，您的网格将只显示您想要的列，但是当点击事件触发时，您可以访问隐藏的列以在控件上显示它们。

Answer 2

根据您的评论，以下是如何在datagridview中更改行更改的数据。您需要更改它以进行实际的数据库调用。我做了一个小桌子作为例子。为此，创建一个新的winforms应用程序，在其上放置一个DataGridView和2个文本框

using System.Data;
using System.Linq;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
    DataTable PretendImADataBase;
    public Form1()
    {
        InitializeComponent();

        PretendImADataBase = CreateTestData();
        //this assigns the row enter event to this function.  Each time the row changes,
        //the function is called.  Inside this function, you load your "big data" columns.
        //That way, you only load 2 or 3 columns for all rows, and each time the row changes,
        //you go back out and load all of the details for only that 1 row.
        //Pretty basic way to load data..
        dataGridView1.RowEnter += dataGridView1_RowEnter;
        //initial loading, only 1 or 2 columns of large dataset, to keep loading time fast.
        //primary key, and enough info to identify the full record.            
        dataGridView1.DataSource = CreateDataSource1();
    }        
    private void dataGridView1_RowEnter(object sender, DataGridViewCellEventArgs e) 
    {
        //This is where you would make your database call to load big data.
        var x = sender as DataGridView;
        if (x.DataSource == null) return;
        var id = x[0, e.RowIndex].Value;

        DataRow oRow = (from DataRow row in PretendImADataBase.Rows where (int)row["FK"] == (int)id select row).FirstOrDefault();
        if (!(oRow == null))
        {
            textBox1.Text = oRow[3].ToString();
            textBox2.Text = oRow[4].ToString();
        }
    }
    private DataTable CreateTestData()
    {
        DataTable oDt = new DataTable();
        DataColumn oCol = new DataColumn("ID", typeof(int));
        oDt.Columns.Add(oCol);
        oCol = new DataColumn("FK", typeof(int));
        oDt.Columns.Add(oCol);
        oCol = new DataColumn("Data1", typeof(string));
        oDt.Columns.Add(oCol);
        oCol = new DataColumn("Data2", typeof(string));
        oDt.Columns.Add(oCol);

        DataRow oRow = oDt.NewRow();
        oRow["ID"] = 1;
        oRow["FK"] = 1;
        oRow["Data1"] = "Test Data 1";
        oRow["Data2"] = "Test Data 2";
        oDt.Rows.Add(oRow);
        oRow = oDt.NewRow();
        oRow["ID"] = 2;
        oRow["FK"] = 2;
        oRow["Data1"] = "Test Data 3";
        oRow["Data2"] = "Test Data 4";
        oDt.Rows.Add(oRow);
        return oDt;
    }
    private DataTable CreateDataSource1()
    {
        DataTable oDt = new DataTable();
        DataColumn oCol = new DataColumn("ID",typeof(int));
        oDt.Columns.Add(oCol);
        oCol = new DataColumn("Display", typeof(string));
        oDt.Columns.Add(oCol);

        DataRow oRow = oDt.NewRow();
        oRow["ID"] = 1;
        oRow["Display"] = "Test 1";
        oDt.Rows.Add(oRow);
        oRow = oDt.NewRow();
        oRow["ID"] = 2;
        oRow["Display"] = "Test 2";
        oDt.Rows.Add(oRow);
        return oDt;
    }
}
}

c＃winform一旦在文本框中单击加载记录，就会在gridview中显示少数列

2 个答案: