C# 将不同的 DataGridView 单元格类型添加到列
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Adding Different DataGridView Cell Types to a Column
提问by Alex
Goal
目标
My datagridview has two columns ([Question], [Answer]). Depending on the known question type(Yes/NoCheckbox, TextTextbox, FileUploadButton) I want the column cell to have the respective control.
我的 datagridview 有两列（[问题]，[答案]）。根据已知的问题类型（是/否复选框、文本文本框、文件上传按钮），我希望列单元格具有相应的控件。
Example
例子
Datagridview Rows:
数据网格视图行：
- [Question] Do you smoke? [Answer] (YesNoCheckbox)
- [Question] How old are you? [Answer] (TextTextbox)
- [Question] Document upload [Answer] (FileUploadButton)
- [问题] 你抽烟吗？[答案]（是否复选框）
- [问题] 你几岁了？[答案]（文本文本框）
- [问题] 文件上传 [答案] ( FileUpload Button)
Work
工作
I programmatically create my datagridviews.
我以编程方式创建我的数据网格视图。
Private Sub FormatQuestionDgv(ByVal dgv As DataGridView)
Dim ColQ As New DataGridViewTextBoxColumn
Dim ColA As New DataGridViewColumn
'Header text
ColQ.HeaderText = "Question"
ColA.HeaderText = "Answer"
'Name
ColQ.Name = "ColQ"
ColA.Name = "ColA"
'Widths
ColQ.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
ColA.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
'Add columns
With dgv.Columns
.Add(ColQ)
.Add(ColA)
End With
End Sub
Problem
问题
As you can see in my work, the answer column is of DataGridViewColumntype. I do not know the question type at that moment. Therefore I declare it as a normal column instead of DataGridViewCheckBoxColumn, DataGridViewTextBoxColumn, DataGridViewButtonColumn...
正如你在我的作品中看到的，答案栏是DataGridViewColumn类型的。我当时不知道问题类型。因此，我将其声明为普通列而不是DataGridViewCheckBoxColumn, DataGridViewTextBoxColumn, DataGridViewButtonColumn...
Since those are not the same type as DataGridViewColumn, I get the following error:
由于这些类型与 不同DataGridViewColumn，我收到以下错误：
How do I go about adding different control types in 1 DataGridViewColumn? Is it even possible?
如何在 1 个 DataGridViewColumn 中添加不同的控件类型？甚至有可能吗？
采纳答案by puneet
Have you looked at these:
你看过这些：
Mixing cell types in a DataGridViewColumn
DataGridview cells of one column can't have different type
Following from the MSDN article...
遵循 MSDN 文章...
There are two ways to do this:
有两种方法可以做到这一点：
- Cast a
DataGridViewCellto a certain cell type that exists. For example, convert aDataGridViewTextBoxCelltoDataGridViewComboBoxCelltype. - Create a control and add it into the controls collection of
DataGridView, set its location and size to fit the cell that to be host.
- 将 a
DataGridViewCell转换为存在的某个单元格类型。例如，将 a 转换DataGridViewTextBoxCell为DataGridViewComboBoxCell类型。 - 创建一个控件并将其添加到 的控件集合中
DataGridView，设置其位置和大小以适合要托管的单元格。
Here's some sample code which illustrates these tricks:
下面是一些说明这些技巧的示例代码：
private void Form5_Load(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt.Columns.Add("name");
for (int j = 0; j < 10; j++)
{
dt.Rows.Add("");
}
this.dataGridView1.DataSource = dt;
this.dataGridView1.Columns[0].Width = 200;
/*
* First method : Convert to an existed cell type such ComboBox cell,etc
*/
DataGridViewComboBoxCell ComboBoxCell = new DataGridViewComboBoxCell();
ComboBoxCell.Items.AddRange(new string[] { "aaa","bbb","ccc" });
this.dataGridView1[0, 0] = ComboBoxCell;
this.dataGridView1[0, 0].Value = "bbb";
DataGridViewTextBoxCell TextBoxCell = new DataGridViewTextBoxCell();
this.dataGridView1[0, 1] = TextBoxCell;
this.dataGridView1[0, 1].Value = "some text";
DataGridViewCheckBoxCell CheckBoxCell = new DataGridViewCheckBoxCell();
CheckBoxCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
this.dataGridView1[0, 2] = CheckBoxCell;
this.dataGridView1[0, 2].Value = true;
/*
* Second method : Add control to the host in the cell
*/
DateTimePicker dtp = new DateTimePicker();
dtp.Value = DateTime.Now.AddDays(-10);
//add DateTimePicker into the control collection of the DataGridView
this.dataGridView1.Controls.Add(dtp);
//set its location and size to fit the cell
dtp.Location = this.dataGridView1.GetCellDisplayRectangle(0, 3,true).Location;
dtp.Size = this.dataGridView1.GetCellDisplayRectangle(0, 3,true).Size;
}
回答by sina
DataGridViewCellStyle styl_Column = new DataGridViewCellStyle();
if (_myColumnCollection[i].TypeColumn == TypColumn.CheckBox)
{
dtv_information.Columns.Add(chk_clmn);
styl_Column.NullValue = false;
}
styl_Column.NullValue = false;
回答by Harald Coppoolse
The other answers are way to difficult and error prone. Why not just add the desired row programmatically?
其他答案是困难和容易出错的方式。为什么不以编程方式添加所需的行？
Example:
例子：
Using the designer, create a form with a DataGridView, and two columns: one for the question and one for the answer.
使用设计器创建一个带有 DataGridView 和两列的表单：一列用于问题，另一列用于答案。
private DataGridView dataGridView3;
private DataGridViewTextBoxColumn columnQuestion;
private DataGridViewTextBoxColumn columnAnswer;
In my class, I created the enum for the answer type
在我的课堂上，我为答案类型创建了枚举
public enum AnswerType
{
Text,
YesNo,
LoadFile,
Combo,
};
The method to create a question cell is simple
创建问题单元格的方法很简单
private DataGridViewCell CreateQuestionCell(string question)
{
return new DataGridViewTextBoxCell()
{
ValueType = typeof(string),
Value = question,
};
}
The method to create an answer cell has a parameter indicating the desired answer type:
创建答案单元格的方法具有指示所需答案类型的参数：
private DataGridViewCell CreateAnswerCell(AnswerType answerType)
{
// type of column depends on rowIndex
DataGridViewCell cell;
switch (answerType)
{
case AnswerType.YesNo: // Create a checkbox cell
cell = new DataGridViewCheckBoxCell()
{
ValueType = typeof(bool),
Value = false,
};
break;
case AnswerType.LoadFile: // Create a Button cell
cell = new DataGridViewButtonCell()
{
ValueType = typeof(string),
Value = "Load!",
};
break;
case AnswerType.Combo: // Create a Combo Cell
var selectableValues = Enumerable.Range(0, 4);
var comboItems = Enumerable.Range(0, 100);
cell = new DataGridViewComboBoxCell()
{
DataSource = new BindingList<int>(comboItems.ToList()),
};
break;
default: // Create a Text cell
cell = new DataGridViewTextBoxCell()
{
ValueType = typeof(string),
Value = "<please enter name>",
};
break;
}
return cell;
}
Upon request add a Row, containing a question cell and an answer cell:
根据请求添加一行，其中包含一个问题单元格和一个答案单元格：
private void AddRow(string question, AnswerType answerType)
{
DataGridViewRow row = new DataGridViewRow();
row.Cells.Add(this.CreateQuestionCell(question));
row.Cells.Add(this.CreateAnswerCell(answerType));
row.Cells[columnQuestion.Index].ReadOnly = true;
this.dataGridView3.Rows.Add(row);
}
To test I created four buttons and handlers to add rows:
为了测试，我创建了四个按钮和处理程序来添加行：
private Button buttonCheckbox;
private Button buttonAction;
private Button buttonCombo;
private Button buttonText;
private void OnButtonCheckbox(object sender, EventArgs e)
{
this.AddRow("Do you smoke", AnswerType.YesNo);
}
private void OnButtonText(object sender, EventArgs e)
{
this.AddRow("Name", AnswerType.Text);
}
private void OnButtonCombo(object sender, EventArgs e)
{
this.AddRow("Age?", AnswerType.Combo);
}
private void OnButtonAction(object sender, EventArgs e)
{
this.AddRow("Document upload", AnswerType.LoadFile);
}
Et voilà, ?a marche! Simple comme bonjour!
Et voilà, ? a Marche！简单的来吧！
