[已解决]更改dataGridView中现有comboBox列的所选项目时如何进行更改 [英] [Solved] How to make a change when changing selected item of an existing comboBox column in a dataGridView

问题描述

大家好，
我遇到了一个问题 [ ^ ]更改dataGridView中comboBox列的选定项时如何更改textBox单元格的内容.

Nuri先生给了我一个例子，但是我无法在我的代码中对其进行模拟，请问我想知道如何使用一个已经存在的comboBox 列而不创建一个新列.

这是努里先生给出的例子:

Hi all,
I was having a problem[^] how to change a content of textBox cell when changing the selected Item of a comboBox column in dataGridView.

Mr. Nuri gives me an example but I am not able to simulate it in my code please I want to know how to do it using an already existing comboBox column not creating a new one.

This is the example given by Mr. Nuri :

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        ComboBox cbm;
        DataGridViewCell currentCell;
        // This DataTable will become a data source for the DataGridView
        DataTable dt = new DataTable();
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            // Create and fill a DataTable as a source of our combobox column
            DataTable typedt = new DataTable();
            typedt.Columns.Add("typeid", typeof(int));
            typedt.Columns.Add("typename");
            typedt.Columns.Add("typedescription");
            typedt.Rows.Add(0, "Typed 0", "description0");
            typedt.Rows.Add(1, "Typed 1", "description1");
            typedt.Rows.Add(2, "Typed 2", "description2");
            typedt.Rows.Add(3, "Typed 3", "description3");
            typedt.Rows.Add(4, "Typed 4", "description4");
            typedt.AcceptChanges();
            // Fill the GridView source table
            dt.Columns.Add("id");
            dt.Columns.Add("name");
            dt.Columns.Add("type", typeof(int));
            dt.Columns.Add("typedescription");
            for (int i = 0; i < 50; i++)
                dt.Rows.Add(i.ToString("000"), "name" + i, i % 4);
            dt.AcceptChanges();
            // Set the data source for the grid
            dataGridView1.DataSource = dt;
            // Create new combobox column and set it''s data source
            DataGridViewComboBoxColumn cbc = new DataGridViewComboBoxColumn();
            cbc.DataPropertyName = "type";
            cbc.DisplayMember = "typename";
            cbc.ValueMember = "typeid";
            cbc.DataSource = typedt;
            cbc.HeaderText = "Type";
            // Replace the third column of the grid view with the combobox column
            dataGridView1.Columns.RemoveAt(2);
            dataGridView1.Columns.Insert(2, cbc);
            // We will handle these events of the DataGridView
            dataGridView1.CellEndEdit += new DataGridViewCellEventHandler(dataGridView1_CellEndEdit);
            dataGridView1.EditingControlShowing += new DataGridViewEditingControlShowingEventHandler(dataGridView1_EditingControlShowing);
        }
        void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            if (cbm != null)
            {
                // Here we will remove the subscription for selected index changed
                cbm.SelectedIndexChanged -= new EventHandler(cbm_SelectedIndexChanged);
            }
        }
        void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            // Here try to add subscription for selected index changed event
            if (e.Control is ComboBox)
            {
                cbm = (ComboBox)e.Control;
                if (cbm != null)
                {
                    cbm.SelectedIndexChanged += new EventHandler(cbm_SelectedIndexChanged);
                }
                currentCell = this.dataGridView1.CurrentCell;
            }
        }
        void cbm_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Invoke method if the selection changed event occurs
            BeginInvoke(new MethodInvoker(EndEdit));
        }
        void EndEdit()
        {
            // Change the content of appropriate cell when selected index changes
            if (cbm != null)
            {
                DataRowView drv = cbm.SelectedItem as DataRowView;
                if (drv != null)
                {
                    this.dataGridView1[currentCell.ColumnIndex + 1, currentCell.RowIndex].Value = drv[2].ToString();
                    this.dataGridView1.EndEdit();
                }
            }
        }
    }
}

预先感谢，
:)

更新:
由OP自己解决.请他在此处发布答案.

Thanks in advance,
:)

UPDATE:
Solved by OP himself. Asked him to post the answer here.

推荐答案

简单地，

在源文件和.cs文件中手动写入下拉selectindexchanged事件并设置autopostback = true.
然后在selectedindexchanged事件中，使用sender对象检索组合框selectedindex和text，并使用dropdownlist clientid获取所选行，如

DropDownList ddl =(DropDownList)sender;

字符串s = ddl.ClientID;//使用子字符串检索行索引
如果(ddl.SelectedItem.Text ==您选择的文本")
{
GridView1.Rows [0] .Cells [1] .Text =";
}
:cool:

simply,

manually write dropdown selectindexchanged event in sourcefile and .cs file and set autopostback=true.
then in selectedindexchanged event use sender object to retreive combobox selectedindex and text and use dropdownlist clientid to get selected row like

DropDownList ddl = (DropDownList)sender;

string s = ddl.ClientID;//use substring to retreive rowindex
if (ddl.SelectedItem.Text == "Your selected text")
{
GridView1.Rows[0].Cells[1].Text = "";
}
:cool:

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