获取不到Grid View里TextBox的值 TextBox用模板添加的 'txtScore' ( 大侠快进)

[zilong4460072]

后台代码如下: 先用DropDownList获得课程名称，在绑定Grid View数据,再Grid View里的TextBox输入成绩后点击 btnSubmit 来获取输入的成绩，但是就是显示不出来，也没提示错误,测试了btnSubmit里的语句，也没有错,不知道什么问题，大侠帮忙看看阿？
public partial class teacherSubmitScore : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (Session["userName"] == null )
{
Response.Redirect("Login.aspx");
}
if (!IsPostBack)
{
BindDDL();
}
BindGridView();
}
private void BindDDL()
{
string strconnection = ConfigurationManager.ConnectionStrings["zilong"].ConnectionString;
SqlConnection conn = new SqlConnection(strconnection);
string SqlStr = "select distinct Course.courseID,Course.courseName from Elect,Course where Elect.teaID=Course.teaID and Elect.teaID='" + Session["userName"].ToString() + "'"; //查询所教授的课程
DataSet ds = new DataSet();
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
da.Fill(ds);
conn.Close();
ddl.DataSource = ds.Tables[0].DefaultView;
ddl.DataTextField = "courseName";
ddl.DataValueField = "courseID";
ddl.DataBind();
}
private void BindGridView()
{
string strconnection = ConfigurationManager.ConnectionStrings["zilong"].ConnectionString;
SqlConnection conn = new SqlConnection(strconnection);
GridView1.Visible = true;
string Sqlstr = "select * from Student,Elect where Student.stuID=Elect.stuID and Elect.courseID='" + ddl.SelectedValue + "'";
DataSet ds = new DataSet();
try
{
if (conn.State.ToString() == "Closed")
conn.Open();
SqlDataAdapter da = new SqlDataAdapter(Sqlstr, conn);
da.Fill(ds);
GridView1.DataSource = ds.Tables[0].DefaultView;
GridView1.DataBind();
}
catch{ }
finally
{ conn.Close();}
}
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
for (int i = 0; i < GridView1.Rows.Count; i++)
{
string text = ((TextBox)GridView1.Rows[i].FindControl("txtScore")).Text.ToString;
Response.Write(text);
}
}
}

[zilong4460072]

如果觉得我表述不清 可以说一下 我解释

[zengxiongbin]

string text = "";
for (int i = 0; i < GridView1.Rows.Count; i++) 
        { 
            text += ((TextBox)GridView1.Rows[i].FindControl("txtScore")).Text.ToString; 
        } 
Response.Write(text); 

这样试试

[zengxiongbin]

还有就是把BindGridView(); 放到if (!IsPostBack) 里面

[criedshy]

把BindGridView()方法放在(!IsPostBack) 里面就可以解决了
if (!IsPostBack)
{
BindDDL();
BindGridView();
}

[zilong4460072]

找到问题了
如果这样
if (!IsPostBack)
{
BindDDL();
BindGridView();
}
可以获得，输出text的值
但是下拉列表 DropDownList 'ddl' 选择课程名称的时候 Grid View就绑定不了了
怎么解决阿？

[mengxj85]

//编辑
protected void btnSubmit_Click(object sender, EventArgs e) 
    { 
        foreach (GridViewRow gr in this.GridView1.Rows) 
        { 
            string text = ((TextBox)gr.FindControl("txtScore")).Text.ToString; 
            Response.Write(text); 
        } 
    } 

贴了很多次

[zilong4460072]

[Quote=引用 4 楼 criedshy 的回复:]
把BindGridView()方法放在(!IsPostBack) 里面就可以解决了
if (!IsPostBack)
{
BindDDL();
BindGridView();
}
[/Quote]

这样是可以输入text的值了
但是Grid View就绑定不了DropDownList所选择的值了

[wangping_li]

foreach (GridViewRow gv in this.gridView.Rows)
{
string str= ((TextBox)gv.FindControl("Text的名称")).Text;
}

[criedshy]

DropDownList 'ddl' 用事件OnSelectedIndexChanged同时设置 AutoPostBack="true"

 protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindGridView();
    }

[xiaoyuzi]

测试了一下，没有问题啊，你可以先debug看能不能进去。
protected void Button3_Click(object sender, EventArgs e)
{
string strText = "";
for (int i = 0; i < this.GridView1.Rows.Count; i++)
{
strText += ((TextBox)(this.GridView1.Rows[i].FindControl("txtScore"))).Text;
}
Response.Write(strText);
}

gridview中的
<asp:BoundField DataField="Birthday" HeaderText="Birthday" SortExpression="Birthday" />
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="txtScore" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>

[zilong4460072]

[Quote=引用 8 楼 wangping_li 的回复:]
foreach (GridViewRow gv in this.gridView.Rows)
{
string str= ((TextBox)gv.FindControl("Text的名称")).Text;
}
[/Quote]
可以解决输入成绩了
是把BindGirdView()放进
if (!IsPostBack)
{
BindDDL();
}
里边
但是可以输 出text的值了
Grid View就绑定不了DropDownList所选择的值了

[zilong4460072]

谢谢各位
成功解决问题！！
开始结贴

[ShadowInWind]

for (int i = 0; i < GridView1.Rows.Count; i++)
{
string text = ((TextBox)GridView1.Rows[i].FindControl("txtScore")).Text.ToString;
Response.Write(text);
}
toString是方法吧？这里当属性用的？

[jiang_jiajia10]

   protected void btnSubmit_Click(object sender, EventArgs e) 
    { 
        foreach (GridViewRow gr in GridView1.Rows)
        {
            TextBox text = (TextBox)gr.Cells[texbox所在列].FindControl("txtScore");
            Response.Write(text); 

        }   
    } 

[rascalwm]

因为你要查找的是在模板里 然后 你直接去findControl 是查不到模板里的控件的 你得给他一个确切的位置 例如 this.gv.Rows[0].cells[0].findControl("id")

[quincystar]

楼主的意思是根据DropDownList里的值来绑定GridView ?
把DropDownList的AutoPostBack设为True试试.