帮小弟看下这段代码：gridview模板列绑定dropdownlist出问题了~~~
[code=C#][/code] protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
//绑定所属区域；
SqlConnection myconnection = new SqlConnection(sqlconn);
SqlCommand mycommand = new SqlCommand("iDCIDConvert", myconnection);
mycommand .CommandType =CommandType .StoredProcedure ;
mycommand.Parameters.Add(new SqlParameter("@iDCID", SqlDbType.Int, 4));
if (e.Row.RowType == DataControlRowType.DataRow)
{
HiddenField hfd1 = (HiddenField)e.Row.FindControl("HiddenField1");
int iDCIDTemp =Convert.ToInt32 ( hfd1.Value);
mycommand.Parameters["@iDCID"].Value = iDCIDTemp;
myconnection.Open();
SqlDataAdapter da = new SqlDataAdapter(mycommand);
DataSet ds = new DataSet();
DropDownList ddl1 = (DropDownList)e.Row.FindControl("DropDownList1");
da.Fill(ds, "basic_DistrictClass");
ddl1.DataSource = ds.Tables["basic_DistrictClass"].DefaultView;
ddl1.DataTextField = "cDCName";
ddl1.DataValueField = "iDCID";
ddl1.DataBind();
myconnection.Close();
}

}

-----------------------------------------
错误：int iDCIDTemp =Convert.ToInt32 ( hfd1.Value); “输入字符串的格式不正确。”


[解决办法]
错误：int iDCIDTemp =Convert.ToInt32 ( hfd1.Value); “输入字符串的格式不正确。”
//////////
在那里设个断点，看看读到的hfd1.Value的值是什么.
[解决办法]
有可能hfd1.Value没有办法转化为int
[解决办法]
hfd1.Value 不全部是数字，所以无法强制转换