Update Data Grid View ASP.NET

Question

Hi i need help in my code. Once i run the program it says Must declare the scalar variable @Police_ID. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Must declare the scalar variable @Police_ID. In my DB Police_ID is FK and Victim_ID is PK Design Code:  DeleteCommand=DELETE FROM [Victim] WHERE [Victim_ID] = @original_Victim_ID AND [Police_ID] = @original_Police_ID AND [FirstName] = @original_FirstName AND [MiddleName] = @original_MiddleName AND [LastName] = @original_LastName AND [IC_No] = @original_IC_No AND [Address] = @original_Address AND [ContactNumber] = @original_ContactNumber InsertCommand=INSERT INTO [Victim] ([Victim_ID] [Police_ID] [FirstName] [MiddleName] [LastName] [IC_No] [Address] [ContactNumber]) VALUES (@Victim_ID @Police_ID @FirstName @MiddleName @LastName @IC_No @Address @ContactNumber) OldValuesParameterFormatString=original_{0} SelectCommand=SELECT * FROM [Victim] UpdateCommand=UPDATE [Victim] SET [Police_ID] = @Police_ID [FirstName] = @FirstName [MiddleName] = @MiddleName [LastName] = @LastName [IC_No] = @IC_No [Address] = @Address [ContactNumber] = @ContactNumber WHERE [Victim_ID] = @original_Victim_ID AND [Police_ID] = @original_Police_ID AND [FirstName] = @original_FirstName AND [MiddleName] = @original_MiddleName AND [LastName] = @original_LastName AND [IC_No] = @original_IC_No AND [Address] = @original_Address AND [ContactNumber] = @original_ContactNumber> Behind Code: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; using System.Data; namespace Final_Project{ public partial class Update_Victim_Details : System.Web.UI.Page { SqlConnection con = new SqlConnection(Data Source=AZM\AZM;Initial Catalog=Police;Integrated Security=True); protected void Page_Load(object sender EventArgs e) { if (!Page.IsPostBack) // If you not place this check then you will get the old values because GridView in Bind on every postback { DataBind(); } } private void BindGrid() // function for binding gridview { DataTable dt = new DataTable(); dt.Columns.Add(Victim_ID); dt.Columns.Add(Police_ID); dt.Columns.Add(FirstName); dt.Columns.Add(MiddleName); dt.Columns.Add(LastName); dt.Columns.Add(IC_No); dt.Columns.Add(Address); dt.Columns.Add(ContactNumber); DataRow r = dt.NewRow(); r[0] = Victim_ID 1; r[1] = Police_ID 1; r[2] = FirstName 1; r[3] = MiddleName 1; r[4] = LastName 1; r[5] = IC_No 1; r[6] = Address 1; r[7] = ContactNumber 1; DataRow r1 = dt.NewRow(); r1[0] = Victim_ID 2; r1[1] = Police_ID 2; r1[2] = FirstName 2; r1[3] = MiddleName 2; r1[4] = LastName 2; r1[5] = IC_No 2; r1[6] = Address 2; r1[7] = ContactNumber 2; dt.Rows.Add(r); dt.Rows.Add(r1); GridView1.DataSource = dt; GridView1.DataBind(); } protected void GridView1_RowEditing(object sender GridViewEditEventArgs e) { GridView1.EditIndex = e.NewEditIndex; // setting new index BindGrid(); } protected void GridView1_RowUpdating(object sender GridViewUpdateEventArgs e) { GridViewRow row = GridView1.Rows[e.RowIndex]; string newvalue = ((TextBox)row.Cells[0].Controls[0]).Text; GridView1.EditIndex = -1; // Again reset } protected void GridView1_RowCancelingEdit(object sender GridViewCancelEditEventArgs e) { GridView1.EditIndex = -1; // reseting grid view BindGrid(); } } } Please Help me i am doing my final project need help please

Rajeesh Menoth · Answer

Hi Ref this : http://www.sql-server-helper.com/error-messages/msg-137.aspx

Upendra Pratap Shahi · Answer

Kindly convert your datatype of that column in int type

Raja T · Answer

Hi try to change Police_ID as int int  /> why means You have pass Police_ID as string while in grid update it is int it should be same datatype...make it int. and also check If we didnot supply the values of @ Police_ID the above mentioned error will occour More details checkout bellow urls http://forums.asp.net/t/1822391.aspx?Must+declare+the+scalar+variable+ http://stackoverflow.com/questions/9584217/asp-net-c-sharp-must-declare-the-scalar-variable

Update Data Grid View ASP.NET

Must declare the scalar variable "@Police_ID".