How to read a row ID in gridview?

奇奇怪怪

I use gridview to display a table, and now I want to update the data in the table, I define the update function myself. .
<asp: BoundField HeaderText = "No" DataField = "DateId" ReadOnly = "True" />
<asp: TemplateField HeaderText = "Date">
   <ItemTemplate>
      <% # Eval ("WDate")%>
   </ ItemTemplate>
   <EditItemTemplate>
       <asp: TextBox ID = "WDate" Text = '<% # Eval ("WDate")%>' runat = "server" Width = "140px" />
   </ EditItemTemplate>
        <ItemStyle Width = "150px" />
</ asp: TemplateField>
Then i updated the place
protected void GridView1_RowUpdating (object sender, GridViewUpdateEventArgs e)
    {
        int id = (int) GridView1.DataKeys [e.RowIndex] .Values ​​[0];
        string date = ((TextBox) GridView1.Rows [e.RowIndex] .FindControl ("WDate")). Text;
        string wdescription = ((TextBox) GridView1.Rows [e.RowIndex] .FindControl ("WDescription")). Text;
        string status = ((TextBox) GridView1.Rows [e.RowIndex] .FindControl ("Status")). Text;
       
        UpdateRecords (); // This is the update function.
        GridView1.EditIndex = -1;
        BindGrid ();

    }
Say me when running
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
The problem is the first line: int id = (int) GridView1.DataKeys [e.RowIndex] .Values ​​[0];

What should I do? Please enlighten master. .

wwtshaw

CheckBox cb = (CheckBox)GridView1.Rows[0].FindControl("CheckBox1");

wwtshaw

If there are multiple lines
for (int i = 0; i <GridView1.Rows.Count; i++)
        {
            CheckBox cb = (CheckBox)GridView1.Rows[i].FindControl("CheckBox1");
            if (cb.Checked)
            {
            }
        }

奇奇怪怪

Thank you, brother. . .
With the addition of CheckBox, the layout of the page is changed. . My current situation is that after the modification is completed, the update button is clicked, but the result is not updated, and the error mentioned above is reported. The cause of this error is, I think it is a problem when selecting the ID. . So I want to know how to choose this ID.

bjpapaya

int id = (int)GridView1.DataKeys[e.RowIndex].Value; Try it like this

wwtshaw

int id = (int)GridView1.DataKeys[i][0].ToString()

奇奇怪怪

Thank you two upstairs. I tested it and it still doesn't work,
The same error after the compilation every day. . .

云逝风轻

int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value.toString());

xuwei29088

Bangding!

34rere

Agree with ls
almost
int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0]);