insert update and delete by using gridview in ASP.NET 4.0

Question

Hi.......
This is Sharda Vishwakarma
I have a problem belong to insert update and delete by using gridview. I'm doing that but i'm geting runtime exception and I'm also trying to get help from
Your website but i'm not able to understand the source code so please help step by step with printscreen.

Thanks & Regards

Sharda Vishwakarma

Kindly Revert back
([email protected])

Satyapriya Nayak · Answer

Hi Sharda, Untitled Page DataKeyNames="VendorId" AllowPaging="True" CellPadding="3" OnPageIndexChanging="ResultGridView_PageIndexChanging" OnRowDeleting="ResultGridView_RowDeleting" OnRowEditing="ResultGridView_RowEditing" OnRowUpdating="ResultGridView_RowUpdating" OnRowCancelingEdit="ResultGridView_RowCancelingEdit" PageSize="5" BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px" CellSpacing="2" OnRowCommand="ResultGridView_RowCommand" AllowSorting="true" onsorting="ResultGridView_Sorting"> ReadOnly="True" SortExpression="VendorId" /> '> '> '> '> '> '> '> '> '> '> '> '> onclick="btn_search_Click" /> using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class _Default : System.Web.UI.Page { string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; //SqlConnection conn = new SqlConnection(connStr); SqlDataAdapter ad = new SqlDataAdapter(); SqlCommand cmd = new SqlCommand(); DataTable dataTable; SqlDataAdapter sqlda; DataSet ds; string str; protected void Page_Load(object sender, EventArgs e) { Session["sortBy"] = null; if (!IsPostBack) { FillVendorGrid(); } } private void FillVendorGrid() { SqlConnection conn = new SqlConnection(connStr); dataTable = new DataTable(); cmd.Connection = conn; cmd.CommandText = "SELECT * FROM Vendor"; ad = new SqlDataAdapter(cmd); ad.Fill(dataTable); ResultGridView.DataSource = dataTable; ResultGridView.DataBind(); } protected void ResultGridView_RowEditing(object sender, GridViewEditEventArgs e) { ResultGridView.EditIndex = e.NewEditIndex; FillVendorGrid(); } protected void ResultGridView_PageIndexChanging(object sender, GridViewPageEventArgs e) { ResultGridView.PageIndex = e.NewPageIndex; FillVendorGrid(); } protected void ResultGridView_RowDeleting(object sender, GridViewDeleteEventArgs e) { SqlConnection conn = new SqlConnection(connStr); cmd.Connection = conn; cmd.CommandText = "DELETE FROM Vendor WHERE VendorId='" + ResultGridView.DataKeys[e.RowIndex].Values[0].ToString() + "'"; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); FillVendorGrid(); } protected void ResultGridView_RowUpdating(object sender, GridViewUpdateEventArgs e) { TextBox txtFName = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtFName"); TextBox txtLName = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtLName"); TextBox txtCity = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtCity"); TextBox txtState = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtState"); TextBox txtCountry = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtCountry"); TextBox txtDescription = (TextBox)ResultGridView.Rows[e.RowIndex].FindControl("txtDescription"); SqlConnection conn = new SqlConnection(connStr); cmd.Connection = conn; cmd.CommandText = "UPDATE Vendor SET VendorFName ='" + txtFName.Text + "',VendorLName ='" + txtLName.Text + "',VendorCity ='" + txtCity.Text + "',VendorState ='" + txtState.Text + "',VendorCountry ='" + txtCountry.Text + "',VendorDescription ='" + txtDescription.Text + "' WHERE VendorId='" + ResultGridView.DataKeys[e.RowIndex].Values[0].ToString() + "'"; conn.Open(); cmd.ExecuteNonQuery(); ResultGridView.EditIndex = -1; FillVendorGrid(); conn.Close(); } protected void ResultGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { ResultGridView.EditIndex = -1; FillVendorGrid(); } protected void ResultGridView_RowCommand(object sender, GridViewCommandEventArgs e) { if (e.CommandName.Equals("AddNew")) { TextBox txtFName = (TextBox)ResultGridView.FooterRow.FindControl("txtFName1"); TextBox txtLName = (TextBox)ResultGridView.FooterRow.FindControl("txtLName1"); TextBox txtCity = (TextBox)ResultGridView.FooterRow.FindControl("txtCity1"); TextBox txtState = (TextBox)ResultGridView.FooterRow.FindControl("txtState1"); TextBox txtCountry = (TextBox)ResultGridView.FooterRow.FindControl("txtCountry1"); TextBox txtDescription = (TextBox)ResultGridView.FooterRow.FindControl("txtDescription1"); SqlConnection conn = new SqlConnection(connStr); cmd.Connection = conn; cmd.CommandText = "INSERT INTO Vendor(VendorFName, VendorLName,VendorCity,VendorState,VendorCountry,VendorDescription) Values('" + txtFName.Text + "', '" + txtLName.Text + "', '" + txtCity.Text + "', '" + txtState.Text + "', '" + txtCountry.Text + "' , '" + txtDescription.Text + "')"; conn.Open(); cmd.ExecuteNonQuery(); FillVendorGrid(); conn.Close(); } } protected void btn_search_Click(object sender, EventArgs e) { SqlConnection conn = new SqlConnection(connStr); conn.Open(); str = "select * from Vendor where VendorFName like '" + TextBox1.Text + "%'"; cmd = new SqlCommand(str, conn); sqlda = new SqlDataAdapter(cmd); ds = new DataSet(); sqlda.Fill(ds, "Vendor"); conn.Close(); ResultGridView.DataSource = ds; ResultGridView.DataMember = "Vendor"; ResultGridView.DataBind(); } protected void ResultGridView_Sorting(object sender, GridViewSortEventArgs e) { Session["sortBy"] = e.SortExpression; FillVendorGrid(); } } Thanks If this post helps you mark it as answer

insert update and delete by using gridview in ASP.NET 4.0

Answers (1)