如何捕获在gridview中选择的行并将用户名值传递给下一页的文本框？

Question

I would like to select the gridview and redirect to the next page where username in gridview passed to the text box in the next page when the row is being clicked. How do i do that?

My code behind (on the first page):

protected void GridView1_OnRowSelected(object sender, GridViewSelectEventArgs e)
{
    var username = Convert.ToString(GridView1.DataKeys[e.NewSelectedIndex].Value);
    Response.Redirect("ViewUploads.aspx?USERNAME=" +username);
}

My code on the second page:

protected void TextBoxUsername_TextChanged(object sender, EventArgs e)
{
    var username = Request.QueryString["USERNAME"];
}

Answer 1

I assume that you're looking for the SelectedIndexChanged event of the GridView .

protected void GridView_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e)
{
    var username = GridView1.DataKeys[e.NewSelectedIndex].Value.ToString();
    Response.Redirect("ViewUploads.aspx?USERNAME=" +username);
}

In the next page( ViewUploads.aspx ) you need to assign it to the TextBox' Text :

protected void Page_Load(object sender, EventArgs e)
{
    if(!IsPostBack && Request.QueryString["USERNAME"] != null)
        this.txtUserName.Text = Request.QueryString["USERNAME"];
}

I'm not sure if you have already done that, if you want to use the DataKeys -collection in the first page, you have to set the DataKeyNames property accordingly. For example:

<asp:gridview id="GridView1" 
    datakeynames="UserName"
    onselectedindexchanged="GridView_SelectedIndexChanging"
    runat="server">
     ...
</asp:gridview>