Refer this link
CREATE TABLE [dbo].[SampleTable2](
[University] [varchar](50) NULL,
[YearCompleted] [varchar](50) NULL
) ON [PRIMARY]
GO
HTML:
<form id="form1" runat="server">
<div>
<asp:GridView ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false"
OnRowCreated="Gridview1_RowCreated">
<Columns>
<asp:TemplateField HeaderText="University">
<ItemTemplate>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Year Completed">
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Remove</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="Button1" runat="server" Text="Save" OnClick="Button1_Click" />
</div>
</form>
C#:
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("University", typeof(string)));
dt.Columns.Add(new DataColumn("YearCompleted", typeof(string)));
dr = dt.NewRow();
dr["University"] = 1;
dr["YearCompleted"] = string.Empty;
dt.Rows.Add(dr);
//dr = dt.NewRow();
//Store the DataTable in ViewState
ViewState["CurrentTable"] = dt;
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["University"] = box1.Text;
drCurrentRow["YearCompleted"] = box2.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 1; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
box1.Text = dt.Rows[i]["University"].ToString();
box2.Text = dt.Rows[i]["YearCompleted"].ToString();
rowIndex++;
}
}
// ViewState["CurrentTable"] = dt;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SetInitialRow();
}
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
protected void Button1_Click(object sender, EventArgs e)
{
int rowIndex = 0;
StringCollection sc = new StringCollection();
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
//get the values from the TextBoxes
//then add it to the collections with a comma "," as the delimited values
sc.Add(box1.Text + "," + box2.Text);
rowIndex++;
}
//Call the method for executing inserts
InsertRecords(sc);
}
}
}
//A method that returns a string which calls the connection string from the web.config
private string GetConnectionString()
{
//"DBConnection" is the name of the Connection String
//that was set up from the web.config file
return System.Configuration.ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
}
//A method that Inserts the records to the database
private void InsertRecords(StringCollection sc)
{
SqlConnection conn = new SqlConnection(GetConnectionString());
StringBuilder sb = new StringBuilder(string.Empty);
string[] splitItems = null;
foreach (string item in sc)
{
const string sqlStatement = "INSERT INTO SampleTable (Column1,Column2) VALUES";
if (item.Contains(","))
{
splitItems = item.Split(",".ToCharArray());
sb.AppendFormat("{0}('{1}','{2}'); ", sqlStatement, splitItems[0], splitItems[1]);
}
}
try
{
conn.Open();
SqlCommand cmd = new SqlCommand(sb.ToString(), conn);
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Script", "alert('Records Successfuly Saved!');", true);
}
catch (System.Data.SqlClient.SqlException ex)
{
string msg = "Insert Error:";
msg += ex.Message;
throw new Exception(msg);
}
finally
{
conn.Close();
}
}
// Hide the Remove Button at the last row of the GridView
protected void Gridview1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
LinkButton lb = (LinkButton)e.Row.FindControl("LinkButton1");
if (lb != null)
{
if (dt.Rows.Count > 1)
{
if (e.Row.RowIndex == dt.Rows.Count - 1)
{
lb.Visible = false;
}
}
else
{
lb.Visible = false;
}
}
}
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
LinkButton lb = (LinkButton)sender;
GridViewRow gvRow = (GridViewRow)lb.NamingContainer;
int rowID = gvRow.RowIndex + 1;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 1)
{
if (gvRow.RowIndex < dt.Rows.Count - 1)
{
//Remove the Selected Row data
dt.Rows.Remove(dt.Rows[rowID]);
}
}
//Store the current data in ViewState for future reference
ViewState["CurrentTable"] = dt;
//Re bind the GridView for the updated data
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
//Set Previous Data on Postbacks
SetPreviousData();
}
Thank You
