我得到复选框的错误值 [英] i get false value of checkboxes
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问题描述
public CheckBox[] cb = null;
int z=0;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
cb = new CheckBox[count - k];
//Database code.........
while (dr.Read())//read data from access database
{
cb[z] = new CheckBox();
cb[z].Text = dr["Member_Name"].ToString();
Panel2.Controls.Add(cb[z]);
Panel2.Controls.Add(new LiteralControl("</br>"));
z = z + 1;
}
}
}
protected void Button6_Click(object sender, EventArgs e)
{
for (int x = 0; x < cb.Length; x++)//ERROR IS HERE:Object reference not set to an instance of an object.
{
if (cb[x].Checked == true)//EVERY TIME I GOT FALSE VALUE RATHER I CHECKED BOXES
{
//processing check boxes
}
}
}
[edit]将标签更改为C#
[/edit]
[edit] Changed tag to C#
[/edit]
推荐答案
您正在动态创建复选框.这些控件必须在访问之前重新创建每个回发.
阅读此 [
You are creating the checkboxes dynamically. These controls has to recreated each and every postback before accessing.
Read this[^] article for more details.
删除if(!IsPostBack)条件
Remove if(!IsPostBack) condition
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