C# 我想在每次单击重置按钮时将Dropdownlist值设置为默认值(例如:选择)
嗨,我的应用程序中有一个下拉列表。 我想要的是每次单击重置按钮时,它都应设置为默认值(选择) 这是我的重置代码C# 我想在每次单击重置按钮时将Dropdownlist值设置为默认值(例如:选择),c#,C#,嗨,我的应用程序中有一个下拉列表。 我想要的是每次单击重置按钮时,它都应设置为默认值(选择) 这是我的重置代码 public void ResetControl() { DDLContainer.SelectedIndex = 0; DDLCountryLoading.SelectedIndex = 0; DDLCountryDestination.SelectedIndex = 0;
public void ResetControl()
{
DDLContainer.SelectedIndex = 0;
DDLCountryLoading.SelectedIndex = 0;
DDLCountryDestination.SelectedIndex = 0;
//DDLContainer.Items.Insert(0, new ListItem(" --SELECT--", "0"));
ImageMode.ImageUrl = "~/ShowImageMode.ashx?Mode=A";
}
这是我的下拉列表代码:
void ddlCountry()
{
con.Open();
cmd = new SqlCommand("select Distinct(mCRY_VCName) from TB_TransCountry", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
DDLCountryLoading.DataSource = ds;
DDLCountryLoading.DataSourceID = String.Empty;
DDLCountryLoading.DataTextField = "mCRY_VCName";
DDLCountryLoading.DataValueField = "mCRY_VCName";
DDLCountryLoading.DataBind();
DDLCountryLoading.Items.Insert(0, new ListItem(" --SELECT--", "0"));
DDLCountryDestination.DataSource = ds;
DDLCountryDestination.DataSourceID = String.Empty;
DDLCountryDestination.DataTextField = "mCRY_VCName";
DDLCountryDestination.DataValueField = "mCRY_VCName";
DDLCountryDestination.DataBind();
DDLCountryDestination.Items.Insert(0, new ListItem(" --SELECT--", "0"));
con.Close();
}
void ddlContainer()
{
con.Open();
cmd = new SqlCommand("select Distinct(mCNT_VCTypeName) from TB_TransContainerType", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
DDLContainer.DataSource = ds;
DDLContainer.DataSourceID = String.Empty;
DDLContainer.DataTextField = "mCNT_VCTypeName";
DDLContainer.DataValueField = "mCNT_VCTypeName";
DDLContainer.DataBind();
DDLContainer.Items.Insert(0, new ListItem(" --SELECT--", "0"));
con.Close();
}
有谁能帮我做到这一点吗 试试这个
DDLContainer.Items[0]。所选内容=true 您有重置方法,因此可以通过设置从-1开始的SelectedIndex来设置索引,也可以使用selectedValue属性并设置该值