How can I make a check all in a gridView with more than one page?

Jonathan 66 Reputation points
2022-01-26T03:24:08.48+00:00

Hello, I'm having problems doing a checkAll function in a gridView because each page of it has 50 rows, but sometimes it loads more than that, creating more than one page. I already have a check all that mark all other check's, but just on one page, if I have more than one page, the check all don't work on the second page, what can I do?

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Accepted answer
  1. Lan Huang-MSFT 25,471 Reputation points Microsoft Vendor
    2022-01-26T08:20:53.93+00:00

    Hi @Jonathan ,
    Did you set the AutoPostBack property to true.
    You can refer to the example below:
    .aspx
    168640-test.txt
    code behind

    ArrayList CheckBoxArray = new ArrayList();  
                    protected void Page_Load(object sender, EventArgs e)  
                    {  
                        if (!IsPostBack)  
                        {  
                            this.GetData();  
                        }  
                    }  
          
                private void GetData()  
                {  
                    using (SqlConnection con = new SqlConnection(@"****"))  
                    {  
                        using (SqlCommand cmd = new SqlCommand("SELECT CustomerID,CompanyName,ContactName,ContactTitle,City,Country FROM Customers", con))  
                        {  
                            SqlDataAdapter sda = new SqlDataAdapter(cmd);  
                            DataTable dt = new DataTable();  
                            sda.Fill(dt);  
                            gvCustomers.DataSource = dt;  
                            gvCustomers.DataBind();  
                        }  
                    }  
                }  
          
                private void PopulateGridByIndex(int index)  
                {  
                    this.gvCustomers.PageIndex = index;  
                    this.GetData();  
                    CheckData();  
                }  
          
                protected void check_CheckedChanged(object sender, EventArgs e)  
                {  
                    int tempIndex = -1;  
                    CheckBox headerCheckbox = (sender as CheckBox);  
                    bool checkedvalue = headerCheckbox.Checked;  
                    ViewState["Uncheck"] = checkedvalue;  
                    tempIndex = gvCustomers.PageIndex;  
                    int pageindex = tempIndex;  
                    for (int i = 0; i <= gvCustomers.PageCount; i++)  
                    {  
                        if (i == gvCustomers.PageCount)  
                        {  
                            PopulateGridByIndex(0);  
                        }  
                        else  
                        {  
                            PopulateGridByIndex(i);  
                        }  
                        string checkAllIndex = "chkAll-" + gvCustomers.PageIndex;  
                        if (checkedvalue)  
                        {  
                            CheckBoxArray.Add(checkAllIndex);  
                        }  
                        foreach (GridViewRow row in gvCustomers.Rows)  
                        {  
                            (row.FindControl("checkbox") as CheckBox).Checked = checkedvalue;  
                        }  
          
                        ((CheckBox)gvCustomers.HeaderRow.Cells[0].FindControl("checkAll")).Checked = checkedvalue;  
                    }  
          
                    ViewState["CheckBoxArray"] = CheckBoxArray;  
                }  
          
                protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)  
                {  
                    PopulateGridByIndex(e.NewPageIndex);  
                    CheckData();  
                }  
          
                private void CheckData()  
                {  
                    if (ViewState["CheckBoxArray"] != null)  
                    {  
                        ArrayList CheckBoxArray = (ArrayList)ViewState["CheckBoxArray"];  
                        string checkAllIndex = "chkAll-" + gvCustomers.PageIndex;  
                        if (CheckBoxArray.IndexOf(checkAllIndex) != -1)  
                        {  
                            foreach (GridViewRow row in gvCustomers.Rows)  
                            {  
                                (row.FindControl("checkbox") as CheckBox).Checked = true;  
                            }  
                            CheckBox chkAll = (CheckBox)gvCustomers.HeaderRow.Cells[0].FindControl("checkAll");  
                            chkAll.Checked = true;  
                        }  
                    }  
                }  
    

    168600-1.gif

    Best regards,
    Lan Huang


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