[英]i can´t convert ToolStripComboBox SelectedValue to Int32 C#
我有一个绑定到数据表的 C# ToolStripComboBox,当我更改选择(事件)时,我尝试获取 SelectedValue,错误消息说该属性是 DataRowView,当我将其转换为 DataRowView 时,错误消息说我无法从 Int32 转换为 DataRowView。 我能怎么做? 谢谢
这对我来说很好用
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
DataTable dt = new DataTable();
DataColumn dc1 = new DataColumn("id", typeof(System.Int32));
DataColumn dc2 = new DataColumn("desc", typeof(System.String));
dt.Columns.Add(dc1);
dt.Columns.Add(dc2);
for (int i = 0; i < 5; i++)
{
DataRow dr = dt.NewRow();
dr["id"] = i;
dr["desc"] = i.ToString() + " desc";
dt.Rows.Add(dr);
}
toolStripComboBox1.ComboBox.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
toolStripComboBox1.ComboBox.SelectionChangeCommitted += ComboBox_SelectionChangeCommitted;
toolStripComboBox1.ComboBox.ValueMember = "id";
toolStripComboBox1.ComboBox.DisplayMember = "desc";
toolStripComboBox1.ComboBox.DataSource = dt;
}
private void ComboBox_SelectionChangeCommitted(object sender, EventArgs e)
{
//throw new NotImplementedException();
int v = Int32.Parse(((DataRowView)toolStripComboBox1.ComboBox.SelectedItem)["id"].ToString());
MessageBox.Show("User Selected " + v.ToString());
}
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
//this line will give you the
}
private void toolStripComboBox1_Click(object sender, EventArgs e)
{
}
}
}
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