[英]datagridview binding source filter
我試圖從BindingSource過濾數據 - 但它不起作用。 我究竟做錯了什么? 我把我的代碼簡化為一個簡約的例子。
問題是,如果我在TextBox中輸入內容 - 沒有任何反應。
public partial class Form1 : Form
{
BindingSource bs = new BindingSource();
public Form1()
{
InitializeComponent();
List<myObj> myObjList= new List<myObj>();
myObjList.Add(new myObj("LastNameA", "Peter"));
myObjList.Add(new myObj("LastNameA", "Klaus"));
myObjList.Add(new myObj("LastNameB", "Peter"));
foreach (myObj obj in myObjList)
{
bs.Add(obj);
}
dataGridView1.DataSource = bs;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
bs.Filter = string.Format("Name LIKE '%{0}%'", textBox1.Text);
dataGridView1.Refresh();
}
}
public class myObj
{
public myObj(string LastName, String Name)
{
this.LastName = LastName;
this.Name = Name;
}
public string LastName { get; set; }
public string Name { get; set; }
}
到目前為止,這對我有用
public partial class Form1 : Form
{
BindingSource bs = new BindingSource();
BindingList<myObj> myObjList = new BindingList<myObj>();
public Form1()
{
InitializeComponent();
myObjList.Add(new myObj("LastNameA", "Peter"));
myObjList.Add(new myObj("LastNameA", "Klaus"));
myObjList.Add(new myObj("LastNameB", "Peter"));
bs.DataSource = myObjList;
dataGridView1.DataSource = myObjList;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
BindingList<myObj> filtered = new BindingList<myObj>(myObjList.Where(obj => obj.Name.Contains(textBox1.Text)).ToList());
dataGridView1.DataSource = filtered;
dataGridView1.Update();
}
}
public class myObj
{
public myObj(string LastName, String Name)
{
this.LastName = LastName;
this.Name = Name;
}
public string LastName { get; set; }
public string Name { get; set; }
}
}
MSDN文檔說:
只有實現IBindingListView接口的底層列表才支持過濾。
替換它
List<myObj> myObjList= new List<myObj>();
有了這個
BindingList<myObj> myObjList= new BindingList<myObj>();
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