WinForm自定义RadionButtonList控件
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// 控件源码 //
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Data;
using System.Reflection;
using System.ComponentModel;
namespace SlowX.DevExPressEkRadionButtonList.Controls
{
/// <summary>
/// RadionButtonList
/// </summary>
public class EkRadionButtonList
:
Panel
{
/// <summary>
///
/// </summary>
public EkRadionButtonList()
{
this.Height = 20;
}
/// <summary>
/// Fires when Slider position has changed
/// </summary>
[Description("Event fires when the Value property changes")]
[Category("Action")]
public event EventHandler EkRadioSelectedIndexChanged;
#region 属性
#region DataTextField ~ 获取或设置为列表项提供文本内容的数据源字段
/// <summary>
/// DataTextField ~ 获取或设置为列表项提供文本内容的数据源字段
/// </summary>
protected string m_DataTextField = null;
/// <summary>
/// DataTextField ~ 获取或设置为列表项提供文本内容的数据源字段
/// </summary>
public string DataTextField
{
get
{
if (m_DataTextField == null || m_DataTextField.Length == 0)
return "TheName";
return m_DataTextField;
}
set
{
m_DataTextField = value;
}
}
#endregion DataTextField ~ 获取或设置为列表项提供文本内容的数据源字段
#region DataValueField ~ 获取或设置为各列表项提供值的数据源字段
/// <summary>
/// DataValueField ~ 获取或设置为各列表项提供值的数据源字段
/// </summary>
protected string m_DataValueField = null;
/// <summary>
/// DataValueField ~ 获取或设置为各列表项提供值的数据源字段
/// </summary>
public string DataValueField
{
get
{
if (m_DataValueField == null || m_DataValueField.Length == 0)
return "ID";
return m_DataValueField;
}
set
{
m_DataValueField = value;
}
}
#endregion DataValueField ~ 获取或设置为各列表项提供值的数据源字段
/// <summary>
/// 位置中的Y
/// </summary>
protected int m_LocY = 2;
/// <summary>
/// 位置中的Y
/// </summary>
public int LocY
{
get
{
return m_LocY;
}
set
{
m_LocY = value;
}
}
/// <summary>
/// 位置中的StartX
/// </summary>
protected int m_LocStartX = 0;
/// <summary>
/// 位置中的StartX
/// </summary>
public int LocStartX
{
get
{
return m_LocStartX;
}
set
{
m_LocStartX = value;
}
}
/// <summary>
/// 位置中的Space
/// </summary>
protected int m_LocSpace = 5;
/// <summary>
/// 位置中的Space
/// </summary>
public int LocSpace
{
get
{
return m_LocSpace;
}
set
{
m_LocSpace = value;
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public bool IsCheck()
{
RadioButton rdb = SelectedItemGet();
if (rdb == null)
return false;
return true;
}
/// <summary>
///
/// </summary>
/// <param name="dt"></param>
public void DataBindCtrl(DataTable dt)
{
RadioButton rdb = null;
int x = LocStartX;
int y = LocY;
int iCount = dt.Rows.Count;
DataRow dr = null;
string strDataTextField = DataTextField;
if (strDataTextField == null || strDataTextField.Length == 0)
strDataTextField = "TheName";
for (int i = 0; i < iCount; ++i)
{
dr = dt.Rows[i];
rdb = new RadioButton();
rdb.Name = this.Name + "_" + i.ToString();
rdb.Text = dr[strDataTextField].ToString();
rdb.Tag = dr;
rdb.CheckedChanged+=new EventHandler(rdb_CheckedChanged);
rdb.Location = new System.Drawing.Point(x, y);
rdb.AutoSize = true;
rdb.Cursor = System.Windows.Forms.Cursors.Hand;
this.Controls.Add(rdb);
x = rdb.Size.Width + x + LocSpace;
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void rdb_CheckedChanged(object sender, EventArgs e)
{
if (EkRadioSelectedIndexChanged != null)
{
RadioButton rdb = sender as RadioButton;
if (rdb == null)
return;
if(rdb.Checked)
EkRadioSelectedIndexChanged(this, new EventArgs());
}
}
#endregion 属性
/// <summary>
/// 计算控件的长度
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
protected int GetCtrlSizeLen(string str)
{
int iLen = GetLength(str);
return iLen * 5 + 20;
}
/// <SUMMARY>
/// 获得字符串长度[中文长度]
/// </SUMMARY>
/// <PARAM name="str"></PARAM>
/// <RETURNS></RETURNS>
private int GetLength(string str)
{
if (str == null || str.Length == 0)
return 0;
ASCIIEncoding ascii = new ASCIIEncoding();
int tempLen = 0;
byte[] s = ascii.GetBytes(str);
int iLen = s.Length;
for (int i = 0; i < iLen; i++)
{
if ((int)s[i] == 63)
{
tempLen += 2;
}
else
{
tempLen += 1;
}
}
return tempLen;
}
/// <summary>
/// 获得选中的元素
/// </summary>
public virtual object SelectedTagGet()
{
RadioButton rdb = SelectedItemGet();
if (rdb == null)
return null;
return rdb.Tag;
}
/// <summary>
///
/// </summary>
public virtual int SelectedIndexGet()
{
RadioButton rdb = SelectedItemGet();
if (rdb == null)
return -1;
return int.Parse(rdb.Name.Substring(this.Name.Length + 1));
}
/// <summary>
///
/// </summary>
/// <param name="theValue"></param>
public virtual void SelectedIndexSet(int theValue)
{
if (theValue == -1)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常：theValue == -1"
);
}
string findName = this.Name + "_" + theValue.ToString();
foreach (Control c in this.Controls)
{
if (c == null)
continue;
if (!(c is RadioButton))
continue;
if (c.Name == findName)
{
(c as RadioButton).Checked = true;
return;
}
}
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常：索引int theValue[" + theValue.ToString() + "]越界"
);
}
/// <summary>
/// 获得选中的项
/// </summary>
/// <returns></returns>
public virtual RadioButton SelectedItemGet()
{
RadioButton theResult = null;
string preName = this.Name + "_";
foreach (Control c in this.Controls)
{
if (c == null)
continue;
if (!(c is RadioButton))
continue;
if (c.Name == null || c.Name.Length == 0)
continue;
if (!c.Name.StartsWith(preName))
continue;
theResult= c as RadioButton;
if (theResult.Checked)
return theResult;
}
return null;
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public virtual int SelectedIntValueGet()
{
string str = SelectedValueGet();
if (str == null)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常：没有获得选中记录"
);
}
return int.Parse(str);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public virtual long SelectedLongValueGet()
{
string str = SelectedValueGet();
if (str == null)
{
throw new Exception
(
"方法："
+ MethodBase.GetCurrentMethod().ReflectedType.FullName
+ " "
+ MethodBase.GetCurrentMethod().ToString()
+ " 发生异常：没有获得选中记录"
);
}
return long.Parse(str);
}
/// <summary>
/// 获得选中
/// </summary>
/// <returns></returns>
public virtual string SelectedValueGet()
{
RadioButton rdb = SelectedItemGet();
if (rdb == null)
return null;
string strDataValueField = DataValueField;
if (strDataValueField == null || strDataValueField.Length == 0)
strDataValueField = "ID";
return (rdb.Tag as DataRow)[strDataValueField].ToString();
}
/// <summary>
/// 获得选中
/// </summary>
/// <returns></returns>
public virtual string SelectedTextGet()
{
RadioButton rdb = SelectedItemGet();
if (rdb == null)
return null;
return rdb.Text;
}
/// <summary>
/// 设置选中
/// </summary>
/// <param name="theValue"></param>
public virtual void SelectedIntValueSet(int theValue)
{
SelectedValueSet(theValue.ToString());
}
/// <summary>
/// 设置选中
/// </summary>
/// <param name="theValue"></param>
public virtual void SelectedValueSet(string theValue)
{
string strDataValueField = DataValueField;
if (strDataValueField == null || strDataValueField.Length == 0)
strDataValueField = "ID";
RadioButton theResult = null;
string preName = this.Name + "_";
foreach (Control c in this.Controls)
{
if (c == null)
continue;
if (!(c is RadioButton))
continue;
if (c.Name == null || c.Name.Length == 0)
continue;
if (!c.Name.StartsWith(preName))
continue;
theResult = c as RadioButton;
if ((theResult.Tag as DataRow)[strDataValueField].ToString() == theValue)
{
theResult.Checked = true;
return;
}
}
}
/// <summary>
/// 设置选中
/// </summary>
/// <param name="theValue"></param>
public virtual void SelectedTextSet(string theValue)
{
RadioButton theResult = null;
string preName = this.Name + "_";
foreach (Control c in this.Controls)
{
if (c == null)
continue;
if (!(c is RadioButton))
continue;
if (c.Name == null || c.Name.Length == 0)
continue;
if (!c.Name.StartsWith(preName))
continue;
theResult = c as RadioButton;
if(theResult.Text == theValue)
{
theResult.Checked = true;
return;
}
}
}
}
}
-
// 调用源码 //
/// <summary>
/// 构建缺省的DataSet数据源
/// </summary>
/// <returns></returns>
protected DataSet DataSetBuild()
{
DataSet theResult = new DataSet();
DataTable dt = new DataTable();
dt.Columns.Add("ID");
dt.Columns.Add("TheName");
int idx = 1;
DataRow dr = null;
dr = dt.NewRow();
dr["ID"] = idx++;
dr["TheName"] = "北京";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["ID"] = idx++;
dr["TheName"] = "天津";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["ID"] = idx++;
dr["TheName"] = "上海";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["ID"] = idx++;
dr["TheName"] = "重庆";
dt.Rows.Add(dr);
theResult.Tables.Add(dt);
return theResult;
}
private void toolStripButton_绑定_Click(object sender, EventArgs e)
{
try
{
DataSet ds =DataSetBuild();
ekRadionButtonList_City.DataTextField = "TheName";
ekRadionButtonList_City.DataValueField = "ID";
ekRadionButtonList_City.DataBindCtrl(ds.Tables[0]);
}
catch (Exception err)
{
MessageBox.Show(err.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ekRadionButtonList_City_EkRadioSelectedIndexChanged(object sender, EventArgs e)
{
try
{
RadioButton rdb = ekRadionButtonList_City.SelectedItemGet();
if (rdb == null)
{
MessageBox.Show("没有选中记录。");
return;
}
label_选中城市.Text = rdb.Text;
}
catch (Exception err)
{
MessageBox.Show(err.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void toolStripButton_取值_Click(object sender, EventArgs e)
{
try
{
string strValue = ekRadionButtonList_City.SelectedValueGet();
MessageBox.Show(strValue);
}
catch (Exception err)
{
MessageBox.Show(err.Message);
}
}
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WinForm自定义RadionButtonList控件 
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