DataGridViewComboBoxCell在选择后显示值成员而不显示成员
DataGridViewComboBoxCell在选择后显示值成员而不显示成员
提问于 2018-05-31 03:12:36
因此，我一直在开发一个DataGridView，其中用户可以更改一行中一个单元格的值，然后将同一行中另一个单元格的类型更改为DataGridViewComboBoxCell或DataGridViewTextBoxCell。我可以让这个组合框像这样显示。
Dictionary<long, string> InspectionTools = new Dictionary<long, string>();
private void DynamicControlsDGV_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (DynamicControlsDGV.Columns[e.ColumnIndex].Name == "typeDataGridViewTextBoxColumn")
{
var type = int.Parse(DynamicControlsDGV[1, e.RowIndex].Value.ToString());
if (type == 8)
{
var CBCell = new DataGridViewComboBoxCell();
CBCell.DataSource = InspectionTools.ToList();
CBCell.ValueMember = "Key";
CBCell.DisplayMember = "Value";
CBCell.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;
DynamicControlsDGV[7, e.RowIndex] = CBCell;
}
else
{
var CBCell = new DataGridViewTextBoxCell();
DynamicControlsDGV[7, e.RowIndex] = CBCell;
}
}
}然而，即使当我单击组合框单元格时看到所有的值，当我选择我想要的单元格时，该单元格会显示值成员(Key/ID)而不是显示成员( Value /Name)。如下图所示：
有没有一种方法可以覆盖单元格格式，这样它就不会将显示文本改回ID？
最小、完整和可验证的示例
在创建MCVE之后，我发现问题出在我的代码中的其他地方。下面是我制作的MSVE (它工作得很好)以供参考：
代码隐藏：
public partial class Form1 : Form
{
public List<KeyValuePair<long, string>> options2 = new List<KeyValuePair<long, string>>();
public Form1()
{
InitializeComponent();
var options = new List<KeyValuePair<long, string>>();
options.Add(new KeyValuePair<long, string>(1, "text"));
options.Add(new KeyValuePair<long, string>(2, "combo"));
options2 = new List<KeyValuePair<long, string>>();
options2.Add(new KeyValuePair<long, string>(1, "option 1"));
options2.Add(new KeyValuePair<long, string>(2, "option 2"));
((DataGridViewComboBoxColumn)dataGridView1.Columns[0]).DataSource = options;
((DataGridViewComboBoxColumn)dataGridView1.Columns[0]).ValueMember = "Key";
((DataGridViewComboBoxColumn)dataGridView1.Columns[0]).DisplayMember = "Value";
for (int i = 0; i < 5; i++)
{
DataGridViewRow row = (DataGridViewRow)dataGridView1.Rows[0].Clone();
dataGridView1.Rows.Add(row);
}
}
private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex==0)
{
try
{
if (int.Parse(dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString()) == 2)
{
var CBCell = new DataGridViewComboBoxCell();
CBCell.DataSource = options2;
CBCell.ValueMember = "Key";
CBCell.DisplayMember = "Value";
CBCell.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox;
dataGridView1[1, e.RowIndex] = CBCell;
}
else
{
var CBCell = new DataGridViewTextBoxCell();
dataGridView1[1, e.RowIndex] = CBCell;
}
}
catch
{
}
}
}
}设计者：
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.dataGridView1 = new System.Windows.Forms.DataGridView();
this.Column2 = new System.Windows.Forms.DataGridViewComboBoxColumn();
this.Column3 = new System.Windows.Forms.DataGridViewTextBoxColumn();
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
this.SuspendLayout();
//
// dataGridView1
//
this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
this.Column2,
this.Column3});
this.dataGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
this.dataGridView1.Location = new System.Drawing.Point(0, 0);
this.dataGridView1.Name = "dataGridView1";
this.dataGridView1.Size = new System.Drawing.Size(879, 564);
this.dataGridView1.TabIndex = 0;
this.dataGridView1.CellValueChanged += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellValueChanged);
//
// Column2
//
this.Column2.HeaderText = "2";
this.Column2.Name = "Column2";
//
// Column3
//
this.Column3.HeaderText = "3";
this.Column3.Name = "Column3";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(879, 564);
this.Controls.Add(this.dataGridView1);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.DataGridView dataGridView1;
private System.Windows.Forms.DataGridViewComboBoxColumn Column2;
private System.Windows.Forms.DataGridViewTextBoxColumn Column3;
}另一个更新
我将字典从字典更改为字典，这是因为我的原始示例将长整型改为字符串，因为它所基于的类将string作为InstrumentName (我正在编辑的列)的类型。因此，在单元格中设置的字符串值不能与它们在字典中的长键值匹配。
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-05-31 06:06:58
数据网格视图基于通过LINQ to SQL创建的类。因此，列类型被设置为string，而不是默认的Object。将组合框的数据源更改为字符串对、字符串后，单元格的格式正确。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50611927
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