遍历List<T>包含字典Dictionary和其他字段dataGridView绑定数据

解决WinForm中字典类型在dataGridView中显示问题

最新推荐文章于 2023-01-10 15:24:18 发布

原创最新推荐文章于 2023-01-10 15:24:18 发布 · 1.6k 阅读

2 ·

CC 4.0 BY-SA版权

文章标签：

#dictionary #list #string #winform #null #class

本文详细介绍了在使用WinForm时，如何处理并展示字典类型数据到dataGridView中，解决了单元格仅显示集合而不显示具体数据的问题。通过动态创建列名并正确绑定数据，实现了字典的Key和Value在dataGridView中的有效展示。

以前做WinForm接触的不多字典类型而且返回在List<T>中，在dataGridView绑定的时候遇到问题，单元格显示集合并不显示数据，在窗体上放一个dataGridView，

下面是类：

public class Certification
{
Dictionary<String, String> Descrribed;
public Dictionary<String, String> Descrribed1
{
get { return Descrribed; }
set { Descrribed = value; }
}

String CertificationStatus;
public String CertificationStatus1
{
get { return CertificationStatus; }
set { CertificationStatus = value; }
}

public Certification(Dictionary<String, String> _dic, String _status)
{
this.Descrribed1 = _dic;
this.CertificationStatus1 = _status;
}
}

在窗体Load事件中加上

动态创建列名：

DataGridViewTextBoxColumn txtKey = new DataGridViewTextBoxColumn();

txtKey.Name = "txtKey";

txtKey.HeaderText = "txtKey";

this.dataGridView2.Columns.Add(txtKey);

DataGridViewTextBoxColumn txtValue = new DataGridViewTextBoxColumn();
txtValue.Name = "txtValue";
txtValue.HeaderText = "txtValue";
this.dataGridView2.Columns.Add(txtValue);

DataGridViewTextBoxColumn txtStatus = new DataGridViewTextBoxColumn();
txtStatus.Name = "txtStatus";
txtStatus.HeaderText = "txtStatus";
this.dataGridView2.Columns.Add(txtStatus);

泛型：
List<Certification> l_Test = new List<Certification>();

Certification cer = new Certification();
cer.Descrribed1 = new Dictionary<String, String>();
cer.Descrribed1.Add("123", "aaa");
cer.Descrribed1.Add("456", "bbb");
cer.Descrribed1.Add("789", "ccc");

cer.CertificationStatus1 = "离开";
cer.CertificationStatus1 = "在线";
cer.CertificationStatus1 = "忙碌";
l_Test.Add(cer);

绑定数据：

this.dataGridView2.Columns["txtKey"].DataPropertyName = "Descrribed1";
this.dataGridView2.Columns["txtStatus"].DataPropertyName = "CertificationStatus1";

this.dataGridView2.DataSource = l_Test;

显示效果：

不能显示dictionary的Key和Value

最后用循环处理，但是数据量大不好处理：

泛型添加数据：

Dictionary<String, String> dicDescribe = new Dictionary<String, String>();
dicDescribe.Add("标题", "描述");
Dictionary<String, String> dicName = new Dictionary<String, String>();
dicName.Add("名称", "内容");

l_Test.Add(new Certification(dicDescribe, "离开"));
l_Test.Add(new Certification(dicName, "忙碌"));
l_Test.Add(new Certification(null, "在线"));

循环写入数据：

String sKey = String.Empty;
String sValue = String.Empty;
int nRow = 0;

foreach (Certification l_cer in l_Test)
{

//添加行
DataGridViewRow dbRow = new DataGridViewRow();
this.dataGridView2.Rows.Add(dbRow);
String sStatus = l_cer.CertificationStatus1.ToString();
if (l_cer.Descrribed1 != null)
{
foreach (KeyValuePair<String, String> item in l_cer.Descrribed1)
{
sKey = item.Key.ToString();
sValue = item.Value.ToString();
}
}
else
{
sKey = "";
sValue = "";
}
this.dataGridView2.Rows[nRow].Cells[0].Value = sKey;
this.dataGridView2.Rows[nRow].Cells[1].Value = sValue;
this.dataGridView2.Rows[nRow].Cells[2].Value = sStatus;
nRow++;
}