C# 尝试在GridView编辑中填充下拉列表
当我在网格视图上单击“编辑”时,有以下代码试图填充下拉列表,它给出了以下错误:C# 尝试在GridView编辑中填充下拉列表,c#,asp.net,gridview,C#,Asp.net,Gridview,当我在网格视图上单击“编辑”时,有以下代码试图填充下拉列表,它给出了以下错误: " 'ddlgvRoom' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value" 你知道我为什么需要在行编辑事件中添加代码吗?如果是,你能帮我吗?我的gridview正在从objectdatasource获取其值 protected void Gr
" 'ddlgvRoom' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value"
你知道我为什么需要在行编辑事件中添加代码吗?如果是,你能帮我吗?我的gridview正在从objectdatasource获取其值
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow &&
(e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
{
DropDownList dl = (DropDownList)e.Row.FindControl("ddlgvRoom");
}
}
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
DropDownList ddlgvRoom = (DropDownList)GridView1.Rows[e.RowIndex].FindControl("ddlgvRoom");
string strgvRoom = ddlgvRoom.SelectedItem.Text.ToString();
DropDownList ddlgvJack = (DropDownList)
GridView1.Rows[e.RowIndex].FindControl("ddlgvJack");
string strgvJack = ddlgvJack.SelectedItem.Text.ToString();
DropDownList ddlgvVlan = (DropDownList)
GridView1.Rows[e.RowIndex].FindControl("ddlgvVlan");
string strgvVlan = ddlgvVlan.SelectedItem.Text.ToString();
GridView1.DataBind();
}
}
必须去掉HTML端的selectedvalue,然后所有内容都开始工作在哪一行出现该错误?在代码周围放置一个try-catch,并捕获异常,然后向我们解释更多细节。您现在在GridView1_RowDataBound中所做的没有任何意义,因为一旦获得dl对象,您就不会对其执行任何操作。感谢您的响应,我尝试填充我的ddlgvRoom,没有错误,只是说所选值不存在,但当我调试它时,值显示得很好。我单击gridview编辑按钮后,它似乎失去了该值