添加BindingNavigator运行程序后，为啥它始终为灰色，我已经设置了datasourse了啊

[tianxiatwo]

BindingSource bs;

public void Bind()
{

string str = "initial catalog = StudentMS;data source = .; integrated security = true";
SqlConnection conn = new SqlConnection(str);
string sql = "select tmi_username,tmi_name,tmi_sex,tmi_department,tmi_situation from Tmoreinfo where tmi_username = '"+_username+"' ";

conn.Open();
SqlDataAdapter sda = new SqlDataAdapter(sql, conn);
DataSet ds = new DataSet();
sda.Fill(ds, "Tmoreinfo");

//定义时指定绑定到某个数据集的某个表
bs = new BindingSource(ds, "Tmoreinfo");
cm.BindingSource = bs;
//绑定时，指定绑定的属性，这里是Text，数据源，这里是bs，数据源中的数据成员，这里是tmi_username等
this.txt_id.DataBindings.Add("Text",bs,"tmi_username");
this.txt_name.DataBindings.Add("Text",bs,"tmi_name");
this.txt_sex.DataBindings.Add("Text", bs, "tmi_sex");
this.txt_department.DataBindings.Add("Text", bs, "tmi_department");
this.txt_situation.DataBindings.Add("Text", bs, "tmi_situation");





}

private void bindingNavigatorMoveFirstItem_Click(object sender, EventArgs e)
{
this.bs.MoveFirst();
}

private void bindingNavigatorMovePreviousItem_Click(object sender, EventArgs e)
{
this.bs.MovePrevious();
}

private void bindingNavigatorMoveNextItem_Click(object sender, EventArgs e)
{
this.bs.MoveNext();
}

private void bindingNavigatorMoveLastItem_Click(object sender, EventArgs e)
{
this.bs.MoveLast();
}
望各位大虾帮帮忙

[捷哥1999]

你不要去写bingdingnavigator按钮的事件，他会自动调用的，你唯一要做的是设置：

this.bindingNavigator1.BindingSource=bs;

[捷哥1999]

this.bindingNavigator1.BindingSource=bs;
设置好以后，Navigator会自动调用BindingSource的导航方法！

[sunchen891229]

路过，学习了~

[tianxiatwo]

将代码改为this.bindingNavigator1.BindingSource = bs;
但是运行时，控件仍然为灰色，无法使用？

[hym51]

无法将BindingNavigator隐式转换为BindingSource