大家帮我看,为什么会有这个问题:The name 'dd1' does not exist in the current context
Label[] myLabel8=new Label[5];
myLabel8[0]=label1;
myLabel8[1]=label2;
myLabel8[2]=label3;
myLabel8[3]=label4;
myLabel8[4]=label5;
TextBox[] td0=new TextBox[5];
td0[0]=textbox1;
td0[1]=textbox2;
td0[2]=textbox3;
td0[3]=textbox4;
td0[4]=textbox5;for(int i=0;i<5;i++){
if (myLabel8[i].Text.IndexOf("申请人")>-1){
String a="dropdownlist";
String b=(i+1).ToString();
DropDownList ddl=this.FindControl(a+b) as DropDownList; td0[i].Text=dd1.SelectedItem.ToString().Trim();
}
}
Label[] myLabel8=new Label[5];
myLabel8[0]=label1;
myLabel8[1]=label2;
myLabel8[2]=label3;
myLabel8[3]=label4;
myLabel8[4]=label5;
TextBox[] td0=new TextBox[5];
td0[0]=textbox1;
td0[1]=textbox2;
td0[2]=textbox3;
td0[3]=textbox4;
td0[4]=textbox5;for(int i=0;i<5;i++){
if (myLabel8[i].Text.IndexOf("申请人")>-1){
String a="dropdownlist";
String b=(i+1).ToString();
DropDownList ddl=this.FindControl(a+b) as DropDownList; td0[i].Text=dd1.SelectedItem.ToString().Trim();
}
}
具体添加在哪个控件下你自己决定
dropdownlist2
dropdownlist3
dropdownlist4
dropdownlist5
在页面中没找到,所以
FindControl('dropdownlist1')返回结果为NULL。
而你又把NULL转换成DropDownList,所以会抛异常。建议把DropDownList ddl=this.FindControl(a+b) as DropDownList;
拆成如下几句:Control ctrl = this.FindControl(a+b);
if(ctrl!=null && ctrl.GetType()==Typeof(DropDownList))
{
DropDownList ddl = ctrl as DropDownList;
//TODO: Something
}